ha_tokudb.cc 313 KB
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#ifdef USE_PRAGMA_IMPLEMENTATION
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#pragma implementation          // gcc: Class implementation
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#endif

#define MYSQL_SERVER 1
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#include "toku_mysql_priv.h"
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#include "hatoku_cmp.h"
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extern "C" {
#include "stdint.h"
#if defined(_WIN32)
#include "misc.h"
#endif
}
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#include "hatoku_assert.h"
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static inline void *thd_data_get(THD *thd, int slot) {
    return thd->ha_data[slot].ha_ptr;
}

static inline void thd_data_set(THD *thd, int slot, void *data) {
    thd->ha_data[slot].ha_ptr = data;
}

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#undef PACKAGE
#undef VERSION
#undef HAVE_DTRACE
#undef _DTRACE_VERSION

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//#include "tokudb_config.h"
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/* We define DTRACE after mysql_priv.h in case it disabled dtrace in the main server */
#ifdef HAVE_DTRACE
#define _DTRACE_VERSION 1
#else
#endif

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#include "hatoku_defines.h"
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#include "ha_tokudb.h"
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#include "hatoku_hton.h"
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#include <mysql/plugin.h>

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static const char *ha_tokudb_exts[] = {
    ha_tokudb_ext,
    NullS
};
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// XXX 4530 get read or write locks on the key file array,
// so that functions not synchronized by mysql table locks
// don't race. 
//
// ha_tokudb::info() does not take any table locks
// so it needs to grab a read lock. any other function writing
// to the key file array needs to grab a write lock.
static void share_key_file_rdlock(TOKUDB_SHARE * share)
{
    rw_rdlock(&share->key_file_lock);
}

static void share_key_file_wrlock(TOKUDB_SHARE * share)
{
    rw_wrlock(&share->key_file_lock);
}

static void share_key_file_unlock(TOKUDB_SHARE * share)
{
    rw_unlock(&share->key_file_lock);
}

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//
// This offset is calculated starting from AFTER the NULL bytes
//
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inline u_int32_t get_fixed_field_size(KEY_AND_COL_INFO* kc_info, TABLE_SHARE* table_share, uint keynr) {
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    uint offset = 0;
    for (uint i = 0; i < table_share->fields; i++) {
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        if (kc_info->field_lengths[i] && !bitmap_is_set(&kc_info->key_filters[keynr],i)) {
            offset += kc_info->field_lengths[i];
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        }
    }
    return offset;
}


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inline u_int32_t get_len_of_offsets(KEY_AND_COL_INFO* kc_info, TABLE_SHARE* table_share, uint keynr) {
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    uint len = 0;
    for (uint i = 0; i < table_share->fields; i++) {
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        if (kc_info->length_bytes[i] && !bitmap_is_set(&kc_info->key_filters[keynr],i)) {
            len += kc_info->num_offset_bytes;
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        }
    }
    return len;
}


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static int allocate_key_and_col_info ( TABLE_SHARE* table_share, KEY_AND_COL_INFO* kc_info) {
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    int error;
    //
    // initialize all of the bitmaps
    //
    for (uint i = 0; i < MAX_KEY + 1; i++) {
        error = bitmap_init(
            &kc_info->key_filters[i],
            NULL,
            table_share->fields,
            false
            );
        if (error) {
            goto exit;
        }
    }
    
    //
    // create the field lengths
    //
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    kc_info->field_lengths = (u_int16_t *)my_malloc(table_share->fields*sizeof(u_int16_t), MYF(MY_WME | MY_ZEROFILL));
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    kc_info->length_bytes= (uchar *)my_malloc(table_share->fields, MYF(MY_WME | MY_ZEROFILL));
    kc_info->blob_fields= (u_int32_t *)my_malloc(table_share->fields*sizeof(u_int32_t), MYF(MY_WME | MY_ZEROFILL));
    
    if (kc_info->field_lengths == NULL || 
        kc_info->length_bytes == NULL || 
        kc_info->blob_fields == NULL ) {
        error = ENOMEM;
        goto exit;
    }
exit:
    if (error) {
        for (uint i = 0; MAX_KEY + 1; i++) {
            bitmap_free(&kc_info->key_filters[i]);
        }
        my_free(kc_info->field_lengths, MYF(MY_ALLOW_ZERO_PTR));
        my_free(kc_info->length_bytes, MYF(MY_ALLOW_ZERO_PTR));
        my_free(kc_info->blob_fields, MYF(MY_ALLOW_ZERO_PTR));
    }
    return error;
}

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/** @brief
    Simple lock controls. The "share" it creates is a structure we will
    pass to each tokudb handler. Do you have to have one of these? Well, you have
    pieces that are used for locking, and they are needed to function.
*/
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static TOKUDB_SHARE *get_share(const char *table_name, TABLE_SHARE* table_share) {
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    TOKUDB_SHARE *share = NULL;
    int error = 0;
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    uint length;
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    pthread_mutex_lock(&tokudb_mutex);
    length = (uint) strlen(table_name);

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    if (!(share = (TOKUDB_SHARE *) my_hash_search(&tokudb_open_tables, (uchar *) table_name, length))) {
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        char *tmp_name;

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        //
        // create share and fill it with all zeroes
        // hence, all pointers are initialized to NULL
        //
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        if (!(share = (TOKUDB_SHARE *) 
            my_multi_malloc(MYF(MY_WME | MY_ZEROFILL), 
                            &share, sizeof(*share),
                            &tmp_name, length + 1, 
                            NullS))) {
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            pthread_mutex_unlock(&tokudb_mutex);
            return NULL;
        }
        share->use_count = 0;
        share->table_name_length = length;
        share->table_name = tmp_name;
        strmov(share->table_name, table_name);
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        error = allocate_key_and_col_info(table_share, &share->kc_info);
        if (error) {
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            goto exit;
        }

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        bzero((void *) share->key_file, sizeof(share->key_file));
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        error = my_hash_insert(&tokudb_open_tables, (uchar *) share);
        if (error) {
            goto exit;
        }
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        thr_lock_init(&share->lock);
        pthread_mutex_init(&share->mutex, MY_MUTEX_INIT_FAST);
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        // XXX 4530 initialize the key file lock
        my_rwlock_init(&share->key_file_lock, 0);
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        my_rwlock_init(&share->num_DBs_lock, 0);
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    }

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exit:
    if (error) {
        pthread_mutex_destroy(&share->mutex);
        my_free((uchar *) share, MYF(0));
        share = NULL;
    }
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    pthread_mutex_unlock(&tokudb_mutex);
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    return share;
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}

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void free_key_and_col_info (KEY_AND_COL_INFO* kc_info) {
    for (uint i = 0; i < MAX_KEY+1; i++) {
        bitmap_free(&kc_info->key_filters[i]);
    }
    
    for (uint i = 0; i < MAX_KEY+1; i++) {
        my_free(kc_info->cp_info[i], MYF(MY_ALLOW_ZERO_PTR));
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        kc_info->cp_info[i] = NULL; // 3144
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    }
    
    my_free(kc_info->field_lengths, MYF(MY_ALLOW_ZERO_PTR));
    my_free(kc_info->length_bytes, MYF(MY_ALLOW_ZERO_PTR));
    my_free(kc_info->blob_fields, MYF(MY_ALLOW_ZERO_PTR));
}

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static int free_share(TOKUDB_SHARE * share, bool mutex_is_locked) {
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    int error, result = 0;

    pthread_mutex_lock(&tokudb_mutex);

    if (mutex_is_locked)
        pthread_mutex_unlock(&share->mutex);
    if (!--share->use_count) {
        DBUG_PRINT("info", ("share->use_count %u", share->use_count));

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        //
        // number of open DB's may not be equal to number of keys we have because add_index
        // may have added some. So, we loop through entire array and close any non-NULL value
        // It is imperative that we reset a DB to NULL once we are done with it.
        //
        for (uint i = 0; i < sizeof(share->key_file)/sizeof(share->key_file[0]); i++) {
            if (tokudb_debug & TOKUDB_DEBUG_OPEN) {
                TOKUDB_TRACE("dbclose:%p\n", share->key_file[i]);
            }
            if (share->key_file[i]) { 
                error = share->key_file[i]->close(share->key_file[i], 0);
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                assert(error == 0);
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                if (error) {
                    result = error;
                }
                share->key_file[i] = NULL;
            }
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        }
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        free_key_and_col_info(&share->kc_info);
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        if (share->status_block && (error = share->status_block->close(share->status_block, 0))) {
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            assert(error == 0);
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            result = error;
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        }
        
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        my_hash_delete(&tokudb_open_tables, (uchar *) share);
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        thr_lock_delete(&share->lock);
        pthread_mutex_destroy(&share->mutex);
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        rwlock_destroy(&share->num_DBs_lock);
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        my_free((uchar *) share, MYF(0));
    }
    pthread_mutex_unlock(&tokudb_mutex);

    return result;
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}

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#define HANDLE_INVALID_CURSOR() \
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    if (cursor == NULL) { \
        error = last_cursor_error; \
        goto cleanup; \
    }

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const char *ha_tokudb::table_type() const {
    extern const char * const tokudb_hton_name;
    return tokudb_hton_name;
} 
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const char *ha_tokudb::index_type(uint inx) {
    return "BTREE";
}
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/* 
 *  returns NULL terminated file extension string
 */
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const char **ha_tokudb::bas_ext() const {
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    TOKUDB_DBUG_ENTER("ha_tokudb::bas_ext");
    DBUG_RETURN(ha_tokudb_exts);
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}

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static inline bool is_insert_ignore (THD* thd) {
    //
    // from http://lists.mysql.com/internals/37735
    //
    return thd->lex->ignore && thd->lex->duplicates == DUP_ERROR;
}

static inline bool is_replace_into(THD* thd) {
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    return thd->lex->duplicates == DUP_REPLACE;
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}

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static inline bool do_ignore_flag_optimization(THD* thd, TABLE* table, bool opt_eligible) {
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    uint pk_insert_mode = get_pk_insert_mode(thd);
    return ( 
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        opt_eligible && 
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        (is_replace_into(thd) || is_insert_ignore(thd)) && 
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        ((!table->triggers && pk_insert_mode < 2) || pk_insert_mode == 0)
        );
}

ulonglong ha_tokudb::table_flags() const {
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    return (table && do_ignore_flag_optimization(ha_thd(), table, share->replace_into_fast) ? 
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        int_table_flags | HA_BINLOG_STMT_CAPABLE : 
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#if defined(HA_GENERAL_ONLINE)
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        int_table_flags | HA_BINLOG_ROW_CAPABLE | HA_BINLOG_STMT_CAPABLE | HA_ONLINE_ALTER);
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#else
        int_table_flags | HA_BINLOG_ROW_CAPABLE | HA_BINLOG_STMT_CAPABLE);
#endif
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}

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//
// Returns a bit mask of capabilities of the key or its part specified by 
// the arguments. The capabilities are defined in sql/handler.h.
//
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ulong ha_tokudb::index_flags(uint idx, uint part, bool all_parts) const {
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    TOKUDB_DBUG_ENTER("ha_tokudb::index_flags");
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    assert(table_share);
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    ulong flags = (HA_READ_NEXT | HA_READ_PREV | HA_READ_ORDER | HA_KEYREAD_ONLY | HA_READ_RANGE);
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    if (table_share->key_info[idx].flags & HA_CLUSTERING) {
        flags |= HA_CLUSTERED_INDEX;
    }
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    DBUG_RETURN(flags);
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}

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//
// struct that will be used as a context for smart DBT callbacks
// contains parameters needed to complete the smart DBT cursor call
//
typedef struct smart_dbt_info {
    ha_tokudb* ha; //instance to ha_tokudb needed for reading the row
    uchar* buf; // output buffer where row will be written
    uint keynr; // index into share->key_file that represents DB we are currently operating on
} *SMART_DBT_INFO;

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typedef struct smart_dbt_bf_info {
    ha_tokudb* ha;
    bool need_val;
    int direction;
    THD* thd;
} *SMART_DBT_BF_INFO;

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typedef struct index_read_info {
    struct smart_dbt_info smart_dbt_info;
    int cmp;
    DBT* orig_key;
} *INDEX_READ_INFO;

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int ai_poll_fun(void *extra, float progress) {
    LOADER_CONTEXT context = (LOADER_CONTEXT)extra;
    if (context->thd->killed) {
        sprintf(context->write_status_msg, "The process has been killed, aborting add index.");
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        return ER_ABORTING_CONNECTION;
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    }
    sprintf(context->write_status_msg, "Adding of indexes about %.1f%% done", progress*100);
    thd_proc_info(context->thd, context->write_status_msg);
    return 0;
}

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int poll_fun(void *extra, float progress) {
    LOADER_CONTEXT context = (LOADER_CONTEXT)extra;
    if (context->thd->killed) {
        sprintf(context->write_status_msg, "The process has been killed, aborting bulk load.");
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        return ER_ABORTING_CONNECTION;
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    }
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    sprintf(context->write_status_msg, "Loading of data about %.1f%% done", progress*100);
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    thd_proc_info(context->thd, context->write_status_msg);
    return 0;
}

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struct hot_poll_fun_extra {
    uint current_table;
    uint num_tables;
};

int hot_poll_fun(void *extra, float progress) {
    HOT_OPTIMIZE_CONTEXT context = (HOT_OPTIMIZE_CONTEXT)extra;
    if (context->thd->killed) {
        sprintf(context->write_status_msg, "The process has been killed, aborting hot optimize.");
        return ER_ABORTING_CONNECTION;
    }
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    sprintf(context->write_status_msg, "Optimization of index %u of %u about %.lf%% done", context->current_table + 1, context->num_tables, progress*100);
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    thd_proc_info(context->thd, context->write_status_msg);
    return 0;
}

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void loader_ai_err_fun(DB *db, int i, int err, DBT *key, DBT *val, void *error_extra) {
    LOADER_CONTEXT context = (LOADER_CONTEXT)error_extra;
    assert(context->ha);
    context->ha->set_loader_error(err);
}

void loader_dup_fun(DB *db, int i, int err, DBT *key, DBT *val, void *error_extra) {
    LOADER_CONTEXT context = (LOADER_CONTEXT)error_extra;
    assert(context->ha);
    context->ha->set_loader_error(err);
    if (err == DB_KEYEXIST) {
        context->ha->set_dup_value_for_pk(key);
    }
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}

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//
// smart DBT callback function for optimize
// in optimize, we want to flatten DB by doing
// a full table scan. Therefore, we don't
// want to actually do anything with the data, hence
// callback does nothing
//
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static int smart_dbt_do_nothing (DBT const *key, DBT  const *row, void *context) {
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  return 0;
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}

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static int smart_dbt_metacallback (DBT const *key, DBT  const *row, void *context) {
    DBT* val = (DBT *)context;
    val->data = my_malloc(row->size, MYF(MY_WME|MY_ZEROFILL));
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    if (val->data == NULL) return ENOMEM;
    memcpy(val->data, row->data, row->size);
    val->size = row->size;
    return 0;
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}

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static int
smart_dbt_callback_rowread_ptquery (DBT const *key, DBT  const *row, void *context) {
    SMART_DBT_INFO info = (SMART_DBT_INFO)context;
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    info->ha->extract_hidden_primary_key(info->keynr, key);
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    return info->ha->read_row_callback(info->buf,info->keynr,row,key);
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}

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//
// Smart DBT callback function in case where we have a covering index
//
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static int
smart_dbt_callback_keyread(DBT const *key, DBT  const *row, void *context) {
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    SMART_DBT_INFO info = (SMART_DBT_INFO)context;
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    info->ha->extract_hidden_primary_key(info->keynr, key);
    info->ha->read_key_only(info->buf,info->keynr,key);
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    return 0;
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}

//
// Smart DBT callback function in case where we do NOT have a covering index
//
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static int
smart_dbt_callback_rowread(DBT const *key, DBT  const *row, void *context) {
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    int error = 0;
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    SMART_DBT_INFO info = (SMART_DBT_INFO)context;
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    info->ha->extract_hidden_primary_key(info->keynr, key);
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    error = info->ha->read_primary_key(info->buf,info->keynr,row,key);
    return error;
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}

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//
// Smart DBT callback function in case where we have a covering index
//
static int
smart_dbt_callback_ir_keyread(DBT const *key, DBT  const *row, void *context) {
    INDEX_READ_INFO ir_info = (INDEX_READ_INFO)context;
    ir_info->cmp = ir_info->smart_dbt_info.ha->prefix_cmp_dbts(ir_info->smart_dbt_info.keynr, ir_info->orig_key, key);
    if (ir_info->cmp) {
        return 0;
    }
    return smart_dbt_callback_keyread(key, row, &ir_info->smart_dbt_info);
}

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static int
smart_dbt_callback_lookup(DBT const *key, DBT  const *row, void *context) {
    INDEX_READ_INFO ir_info = (INDEX_READ_INFO)context;
    ir_info->cmp = ir_info->smart_dbt_info.ha->prefix_cmp_dbts(ir_info->smart_dbt_info.keynr, ir_info->orig_key, key);
    return 0;
}


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//
// Smart DBT callback function in case where we do NOT have a covering index
//
static int
smart_dbt_callback_ir_rowread(DBT const *key, DBT  const *row, void *context) {
    INDEX_READ_INFO ir_info = (INDEX_READ_INFO)context;
    ir_info->cmp = ir_info->smart_dbt_info.ha->prefix_cmp_dbts(ir_info->smart_dbt_info.keynr, ir_info->orig_key, key);
    if (ir_info->cmp) {
        return 0;
    }
    return smart_dbt_callback_rowread(key, row, &ir_info->smart_dbt_info);
}

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//
// macro for Smart DBT callback function, 
// so we do not need to put this long line of code in multiple places
//
#define SMART_DBT_CALLBACK ( this->key_read ? smart_dbt_callback_keyread : smart_dbt_callback_rowread ) 
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#define SMART_DBT_IR_CALLBACK ( this->key_read ? smart_dbt_callback_ir_keyread : smart_dbt_callback_ir_rowread ) 
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//
// macro that modifies read flag for cursor operations depending on whether
// we have preacquired lock or not
//
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#define SET_PRELOCK_FLAG(flg) ((flg) | (range_lock_grabbed ? (use_write_locks ? DB_PRELOCKED_WRITE : DB_PRELOCKED) : 0))
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//
// This method retrieves the value of the auto increment column of a record in MySQL format
// This was basically taken from MyISAM
// Parameters:
//              type - the type of the auto increment column (e.g. int, float, double...)
//              offset - offset into the record where the auto increment column is stored
//      [in]    record - MySQL row whose auto increment value we want to extract
// Returns:
//      The value of the auto increment column in record
//
ulonglong retrieve_auto_increment(uint16 type, uint32 offset,const uchar *record)
{
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    const uchar *key;     /* Key */
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    ulonglong   unsigned_autoinc = 0;  /* Unsigned auto-increment */
    longlong      signed_autoinc = 0;  /* Signed auto-increment */
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    enum { unsigned_type, signed_type } autoinc_type;
    float float_tmp;   /* Temporary variable */
    double double_tmp; /* Temporary variable */

    key = ((uchar *) record) + offset;

    /* Set default autoincrement type */
    autoinc_type = unsigned_type;

    switch (type) {
    case HA_KEYTYPE_INT8:
        signed_autoinc   = (longlong) *(char*)key;
        autoinc_type     = signed_type;
        break;

    case HA_KEYTYPE_BINARY:
        unsigned_autoinc = (ulonglong) *(uchar*) key;
        break;

    case HA_KEYTYPE_SHORT_INT:
        signed_autoinc   = (longlong) sint2korr(key);
        autoinc_type     = signed_type;
        break;

    case HA_KEYTYPE_USHORT_INT:
        unsigned_autoinc = (ulonglong) uint2korr(key);
        break;

    case HA_KEYTYPE_LONG_INT:
        signed_autoinc   = (longlong) sint4korr(key);
        autoinc_type     = signed_type;
        break;

    case HA_KEYTYPE_ULONG_INT:
        unsigned_autoinc = (ulonglong) uint4korr(key);
        break;

    case HA_KEYTYPE_INT24:
        signed_autoinc   = (longlong) sint3korr(key);
        autoinc_type     = signed_type;
        break;

    case HA_KEYTYPE_UINT24:
        unsigned_autoinc = (ulonglong) uint3korr(key);
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    break;
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    case HA_KEYTYPE_LONGLONG:
        signed_autoinc   = sint8korr(key);
        autoinc_type     = signed_type;
        break;

    case HA_KEYTYPE_ULONGLONG:
        unsigned_autoinc = uint8korr(key);
        break;

    /* The remaining two cases should not be used but are included for 
       compatibility */
    case HA_KEYTYPE_FLOAT:                      
        float4get(float_tmp, key);  /* Note: float4get is a macro */
        signed_autoinc   = (longlong) float_tmp;
        autoinc_type     = signed_type;
        break;

    case HA_KEYTYPE_DOUBLE:
        float8get(double_tmp, key); /* Note: float8get is a macro */
        signed_autoinc   = (longlong) double_tmp;
        autoinc_type     = signed_type;
        break;

    default:
        DBUG_ASSERT(0);
        unsigned_autoinc = 0;
    }

    if (signed_autoinc < 0) {
        signed_autoinc = 0;
    }

    return autoinc_type == unsigned_type ?  
           unsigned_autoinc : (ulonglong) signed_autoinc;
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}


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inline bool
is_null_field( TABLE* table, Field* field, const uchar* record) {
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    uint null_offset;
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    bool ret_val;
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    if (!field->null_ptr) {
        ret_val = false;
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        goto exitpt;
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    }
    null_offset = get_null_offset(table,field);
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    ret_val = (record[null_offset] & field->null_bit) ? true: false;

exitpt:
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    return ret_val;
}

inline ulong field_offset(Field* field, TABLE* table) {
    return((ulong) (field->ptr - table->record[0]));
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}

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inline HA_TOKU_ISO_LEVEL tx_to_toku_iso(ulong tx_isolation) {
    if (tx_isolation == ISO_READ_UNCOMMITTED) {
        return hatoku_iso_read_uncommitted;
    }
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    else if (tx_isolation == ISO_READ_COMMITTED) {
        return hatoku_iso_read_committed;
    }
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    else if (tx_isolation == ISO_REPEATABLE_READ) {
        return hatoku_iso_repeatable_read;
    }
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    else {
        return hatoku_iso_serializable;
    }
}

inline u_int32_t toku_iso_to_txn_flag (HA_TOKU_ISO_LEVEL lvl) {
    if (lvl == hatoku_iso_read_uncommitted) {
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        return DB_READ_UNCOMMITTED;
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    }
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    else if (lvl == hatoku_iso_read_committed) {
        return DB_READ_COMMITTED;
    }
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    else if (lvl == hatoku_iso_repeatable_read) {
        return DB_TXN_SNAPSHOT;
    }
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    else {
        return 0;
    }
}

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int filter_key_part_compare (const void* left, const void* right) {
    FILTER_KEY_PART_INFO* left_part= (FILTER_KEY_PART_INFO *)left;
    FILTER_KEY_PART_INFO* right_part = (FILTER_KEY_PART_INFO *)right;
    return left_part->offset - right_part->offset;
}


//
// Be very careful with parameters passed to this function. Who knows
// if key, table have proper info set. I had to verify by checking
// in the debugger.
//
void set_key_filter(MY_BITMAP* key_filter, KEY* key, TABLE* table, bool get_offset_from_keypart) {
    FILTER_KEY_PART_INFO parts[MAX_REF_PARTS];
    uint curr_skip_index = 0;

    for (uint i = 0; i < key->key_parts; i++) {
        //
        // horrendous hack due to bugs in mysql, basically
        // we cannot always reliably get the offset from the same source
        //
        parts[i].offset = get_offset_from_keypart ? key->key_part[i].offset : field_offset(key->key_part[i].field, table);
        parts[i].part_index = i;
    }
    qsort(
        parts, // start of array
        key->key_parts, //num elements
        sizeof(*parts), //size of each element
        filter_key_part_compare
        );

    for (uint i = 0; i < table->s->fields; i++) {
        Field* field = table->field[i];
        uint curr_field_offset = field_offset(field, table);
        if (curr_skip_index < key->key_parts) {
            uint curr_skip_offset = 0;
            curr_skip_offset = parts[curr_skip_index].offset;
            if (curr_skip_offset == curr_field_offset) {
                //
                // we have hit a field that is a portion of the primary key
                //
                uint curr_key_index = parts[curr_skip_index].part_index;
                curr_skip_index++;
                //
                // only choose to continue over the key if the key's length matches the field's length
                // otherwise, we may have a situation where the column is a varchar(10), the
                // key is only the first 3 characters, and we end up losing the last 7 bytes of the
                // column
                //
                TOKU_TYPE toku_type;
                toku_type = mysql_to_toku_type(field);
                switch(toku_type) {
                case(toku_type_blob):
                    break;
                case(toku_type_varbinary):
                case(toku_type_varstring):
                case(toku_type_fixbinary):
                case(toku_type_fixstring):
                    if (key->key_part[curr_key_index].length == field->field_length) {
                        bitmap_set_bit(key_filter,i);
                    }
                    break;
                default:
                    bitmap_set_bit(key_filter,i);
                    break;
                }
            }
        }
    }
}


inline uchar* pack_fixed_field(
    uchar* to_tokudb,
    const uchar* from_mysql,
    u_int32_t num_bytes
    )
{
    switch (num_bytes) {
    case (1):
        memcpy(to_tokudb, from_mysql, 1);
        break;
    case (2):
        memcpy(to_tokudb, from_mysql, 2);
        break;
    case (3):
        memcpy(to_tokudb, from_mysql, 3);
        break;
    case (4):
        memcpy(to_tokudb, from_mysql, 4);
        break;
    case (8):
        memcpy(to_tokudb, from_mysql, 8);
        break;
    default:
        memcpy(to_tokudb, from_mysql, num_bytes);
        break;
    }
    return to_tokudb+num_bytes;
}

inline const uchar* unpack_fixed_field(
    uchar* to_mysql,
    const uchar* from_tokudb,
    u_int32_t num_bytes
    )
{
    switch (num_bytes) {
    case (1):
        memcpy(to_mysql, from_tokudb, 1);
        break;
    case (2):
        memcpy(to_mysql, from_tokudb, 2);
        break;
    case (3):
        memcpy(to_mysql, from_tokudb, 3);
        break;
    case (4):
        memcpy(to_mysql, from_tokudb, 4);
        break;
    case (8):
        memcpy(to_mysql, from_tokudb, 8);
        break;
    default:
        memcpy(to_mysql, from_tokudb, num_bytes);
        break;
    }
    return from_tokudb+num_bytes;
}


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inline uchar* write_var_field(
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    uchar* to_tokudb_offset_ptr, //location where offset data is going to be written
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    uchar* to_tokudb_data, // location where data is going to be written
    uchar* to_tokudb_offset_start, //location where offset starts, IS THIS A BAD NAME????
    const uchar * data, // the data to write
    u_int32_t data_length, // length of data to write
    u_int32_t offset_bytes // number of offset bytes
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    )
{
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    memcpy(to_tokudb_data, data, data_length);
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    //
    // for offset, we pack the offset where the data ENDS!
    //
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    u_int32_t offset = to_tokudb_data + data_length - to_tokudb_offset_start;
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    switch(offset_bytes) {
    case (1):
        to_tokudb_offset_ptr[0] = (uchar)offset;
        break;
    case (2):
        int2store(to_tokudb_offset_ptr,offset);
        break;
    default:
        assert(false);
        break;
    }
    return to_tokudb_data + data_length;
}

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inline u_int32_t get_var_data_length(
    const uchar * from_mysql, 
    u_int32_t mysql_length_bytes 
    ) 
{
    u_int32_t data_length;
    switch(mysql_length_bytes) {
    case(1):
        data_length = from_mysql[0];
        break;
    case(2):
        data_length = uint2korr(from_mysql);
        break;
    default:
        assert(false);
        break;
    }
    return data_length;
}

inline uchar* pack_var_field(
    uchar* to_tokudb_offset_ptr, //location where offset data is going to be written
    uchar* to_tokudb_data, // pointer to where tokudb data should be written
    uchar* to_tokudb_offset_start, //location where data starts, IS THIS A BAD NAME????
    const uchar * from_mysql, // mysql data
    u_int32_t mysql_length_bytes, //number of bytes used to store length in from_mysql
    u_int32_t offset_bytes //number of offset_bytes used in tokudb row
    )
{
    uint data_length = get_var_data_length(from_mysql, mysql_length_bytes);    
    return write_var_field(
        to_tokudb_offset_ptr,
        to_tokudb_data,
        to_tokudb_offset_start,
        from_mysql + mysql_length_bytes,
        data_length,
        offset_bytes
        );
}

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inline void unpack_var_field(
    uchar* to_mysql,
    const uchar* from_tokudb_data,
    u_int32_t from_tokudb_data_len,
    u_int32_t mysql_length_bytes
    )
{
    //
    // store the length
    //
    switch (mysql_length_bytes) {
    case(1):
        to_mysql[0] = (uchar)from_tokudb_data_len;
        break;
    case(2):
        int2store(to_mysql, from_tokudb_data_len);
        break;
    default:
        assert(false);
        break;
    }
    //
    // store the data
    //
    memcpy(to_mysql+mysql_length_bytes, from_tokudb_data, from_tokudb_data_len);
}

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uchar* pack_toku_field_blob(
    uchar* to_tokudb,
    const uchar* from_mysql,
    Field* field
    )
{
    u_int32_t len_bytes = field->row_pack_length();
    u_int32_t length = 0;
    uchar* data_ptr = NULL;
    memcpy(to_tokudb, from_mysql, len_bytes);

    switch (len_bytes) {
    case (1):
        length = (u_int32_t)(*from_mysql);
        break;
    case (2):
        length = uint2korr(from_mysql);
        break;
    case (3):
        length = uint3korr(from_mysql);
        break;
    case (4):
        length = uint4korr(from_mysql);
        break;
    default:
        assert(false);
    }

    if (length > 0) {
        memcpy_fixed((uchar *)(&data_ptr), from_mysql + len_bytes, sizeof(uchar*));
        memcpy(to_tokudb + len_bytes, data_ptr, length);
    }
    return (to_tokudb + len_bytes + length);
}

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static int add_table_to_metadata(const char *name, TABLE* table, DB_TXN* txn) {
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    int error = 0;
    DBT key;
    DBT val;
    uchar hidden_primary_key = (table->s->primary_key >= MAX_KEY);
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    assert(txn);
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    bzero((void *)&key, sizeof(key));
    bzero((void *)&val, sizeof(val));
    key.data = (void *)name;
    key.size = strlen(name) + 1;
    val.data = &hidden_primary_key;
    val.size = sizeof(hidden_primary_key);
    error = metadata_db->put(
        metadata_db,
        txn,
        &key,
        &val,
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        0
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        );
    return error;
}

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static int drop_table_from_metadata(const char *name, DB_TXN* txn) {
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    int error = 0;
    DBT key;
    DBT data;
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    assert(txn);
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    bzero((void *)&key, sizeof(key));
    bzero((void *)&data, sizeof(data));
    key.data = (void *)name;
    key.size = strlen(name) + 1;
    error = metadata_db->del(
        metadata_db, 
        txn, 
        &key , 
        DB_DELETE_ANY
        );
    return error;
}

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static int rename_table_in_metadata(const char *from, const char *to, DB_TXN* txn) {
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    int error = 0;
    DBT from_key;
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    DBT to_key;
    DBT val;
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    assert(txn);
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    bzero((void *)&from_key, sizeof(from_key));
    bzero((void *)&to_key, sizeof(to_key));
    bzero((void *)&val, sizeof(val));
    from_key.data = (void *)from;
    from_key.size = strlen(from) + 1;
    to_key.data = (void *)to;
    to_key.size = strlen(to) + 1;
    
    error = metadata_db->getf_set(
        metadata_db, 
        txn, 
        0, 
        &from_key, 
        smart_dbt_metacallback, 
        &val
        );

    if (error) {
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        goto cleanup;
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    }

    error = metadata_db->put(
        metadata_db,
        txn,
        &to_key,
        &val,
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        0
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        );
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    if (error) {
        goto cleanup;
    }
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    error = metadata_db->del(
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        metadata_db, 
        txn, 
        &from_key, 
        DB_DELETE_ANY
        );
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    if (error) {
        goto cleanup;
    }
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    error = 0;

cleanup:
    my_free(val.data, MYF(MY_ALLOW_ZERO_PTR));

    return error;
}


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static int check_table_in_metadata(const char *name, bool* table_found, DB_TXN* txn) {
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    int error = 0;
    DBT key;
    pthread_mutex_lock(&tokudb_meta_mutex);
    bzero((void *)&key, sizeof(key));
    key.data = (void *)name;
    key.size = strlen(name) + 1;
    
    error = metadata_db->getf_set(
        metadata_db, 
        txn, 
        0, 
        &key, 
        smart_dbt_do_nothing, 
        NULL
        );

    if (error == 0) {
        *table_found = true;
    }
    else if (error == DB_NOTFOUND){
        *table_found = false;
        error = 0;
    }

    pthread_mutex_unlock(&tokudb_meta_mutex);
    return error;
}

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int create_tokudb_trx_data_instance(tokudb_trx_data** out_trx) {
    int error;
    tokudb_trx_data* trx = NULL;
    trx = (tokudb_trx_data *) my_malloc(sizeof(*trx), MYF(MY_ZEROFILL));
    if (!trx) {
        error = ENOMEM;
        goto cleanup;
    }

    *out_trx = trx;
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    error = 0;
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cleanup:
    return error;
}

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inline int tokudb_generate_row(
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    DB *dest_db, 
    DB *src_db,
    DBT *dest_key, 
    DBT *dest_val,
    const DBT *src_key, 
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    const DBT *src_val
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    ) 
{
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    int error;

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    DB* curr_db = dest_db;
    uchar* row_desc = NULL;
    u_int32_t desc_size;
    uchar* buff = NULL;
    u_int32_t max_key_len = 0;
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    row_desc = (uchar *)curr_db->descriptor->dbt.data;
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    row_desc += (*(u_int32_t *)row_desc);
    desc_size = (*(u_int32_t *)row_desc) - 4;
    row_desc += 4;
    
    if (is_key_pk(row_desc, desc_size)) {
        if (dest_key->flags == DB_DBT_REALLOC && dest_key->data != NULL) {
            free(dest_key->data);
        }
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        if (dest_val != NULL) {
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            if (dest_val->flags == DB_DBT_REALLOC && dest_val->data != NULL) {
                free(dest_val->data);
            }
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        }
        dest_key->data = src_key->data;
        dest_key->size = src_key->size;
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        dest_key->flags = 0;
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        if (dest_val != NULL) {
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            dest_val->data = src_val->data;
            dest_val->size = src_val->size;
            dest_val->flags = 0;
        }
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        error = 0;
        goto cleanup;
    }
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    // at this point, we need to create the key/val and set it
    // in the DBTs
    if (dest_key->flags == 0) {
        dest_key->ulen = 0;
        dest_key->size = 0;
        dest_key->data = NULL;
        dest_key->flags = DB_DBT_REALLOC;
    }
    if (dest_key->flags == DB_DBT_REALLOC) {
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        max_key_len = max_key_size_from_desc(row_desc, desc_size);
        max_key_len += src_key->size;
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        if (max_key_len > dest_key->ulen) {
            void* old_ptr = dest_key->data;
            void* new_ptr = NULL;
            new_ptr = realloc(old_ptr, max_key_len);
            assert(new_ptr);
            dest_key->data = new_ptr;
            dest_key->ulen = max_key_len;
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        }
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        buff = (uchar *)dest_key->data;
        assert(buff != NULL && max_key_len > 0);
    }
    else {
        assert(false);
    }

    dest_key->size = pack_key_from_desc(
        buff,
        row_desc,
        desc_size,
        src_key,
        src_val
        );
    assert(dest_key->ulen >= dest_key->size);
    if (tokudb_debug & TOKUDB_DEBUG_CHECK_KEY && !max_key_len) {
        max_key_len = max_key_size_from_desc(row_desc, desc_size);
        max_key_len += src_key->size;
    }
    if (max_key_len) {
        assert(max_key_len >= dest_key->size);
    }

    row_desc += desc_size;
    desc_size = (*(u_int32_t *)row_desc) - 4;
    row_desc += 4;
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    if (dest_val != NULL) {
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        if (!is_key_clustering(row_desc, desc_size)) {
            dest_val->size = 0;
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        }
        else {
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            uchar* buff = NULL;            
            if (dest_val->flags == 0) {
                dest_val->ulen = 0;
                dest_val->size = 0;
                dest_val->data = NULL;
                dest_val->flags = DB_DBT_REALLOC;
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            }
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            if (dest_val->flags == DB_DBT_REALLOC){
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                if (dest_val->ulen < src_val->size) {
                    void* old_ptr = dest_val->data;
                    void* new_ptr = NULL;
                    new_ptr = realloc(old_ptr, src_val->size);
                    assert(new_ptr);
                    dest_val->data = new_ptr;
                    dest_val->ulen = src_val->size;
                }
                buff = (uchar *)dest_val->data;
                assert(buff != NULL);
            }
            else {
                assert(false);
            }
            dest_val->size = pack_clustering_val_from_desc(
                buff,
                row_desc,
                desc_size,
                src_val
                );
            assert(dest_val->ulen >= dest_val->size);
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        }
    }
    error = 0;
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cleanup:
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    return error;
}

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int generate_row_for_del(
    DB *dest_db, 
    DB *src_db,
    DBT *dest_key,
    const DBT *src_key, 
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    const DBT *src_val
    )
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{
    return tokudb_generate_row(
        dest_db,
        src_db,
        dest_key,
        NULL,
        src_key,
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        src_val
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        );
}


int generate_row_for_put(
    DB *dest_db, 
    DB *src_db,
    DBT *dest_key, 
    DBT *dest_val,
    const DBT *src_key, 
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    const DBT *src_val
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    ) 
{
    return tokudb_generate_row(
        dest_db,
        src_db,
        dest_key,
        dest_val,
        src_key,
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        src_val
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        );
}

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ha_tokudb::ha_tokudb(handlerton * hton, TABLE_SHARE * table_arg):handler(hton, table_arg) 
    // flags defined in sql\handler.h
{
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    int_table_flags = HA_REC_NOT_IN_SEQ  | HA_NULL_IN_KEY | HA_CAN_INDEX_BLOBS | HA_PRIMARY_KEY_IN_READ_INDEX | 
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                    HA_FILE_BASED | HA_AUTO_PART_KEY | HA_TABLE_SCAN_ON_INDEX;
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    alloc_ptr = NULL;
    rec_buff = NULL;
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    rec_update_buff = NULL;
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    transaction = NULL;
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    is_fast_alter_running = false;
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    cursor = NULL;
    fixed_cols_for_query = NULL;
    var_cols_for_query = NULL;
    num_fixed_cols_for_query = 0;
    num_var_cols_for_query = 0;
    unpack_entire_row = true;
    read_blobs = false;
    read_key = false;
    added_rows = 0;
    deleted_rows = 0;
    last_dup_key = UINT_MAX;
    using_ignore = 0;
    last_cursor_error = 0;
    range_lock_grabbed = false;
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    blob_buff = NULL;
    num_blob_bytes = 0;
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    delay_updating_ai_metadata = false;
    ai_metadata_update_required = false;
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    bzero(mult_key_dbt, sizeof(mult_key_dbt));
    bzero(mult_rec_dbt, sizeof(mult_rec_dbt));
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    loader = NULL;
    abort_loader = false;
    bzero(&lc, sizeof(lc));
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    lock.type = TL_IGNORE;
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    for (u_int32_t i = 0; i < MAX_KEY+1; i++) {
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        mult_put_flags[i] = 0;
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        mult_del_flags[i] = DB_DELETE_ANY;
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        mult_dbt_flags[i] = DB_DBT_REALLOC;
    }
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    num_DBs_locked_in_bulk = false;
    lock_count = 0;
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    use_write_locks = false;
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    range_query_buff = NULL;
    size_range_query_buff = 0;
    bytes_used_in_range_query_buff = 0;
    curr_range_query_buff_offset = 0;
    doing_bulk_fetch = false;
    prelocked_left_range_size = 0;
    prelocked_right_range_size = 0;
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}

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ha_tokudb::~ha_tokudb() {
}

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//
// states if table has an auto increment column, if so, sets index where auto inc column is to index
// Parameters:
//      [out]   index - if auto inc exists, then this param is set to where it exists in table, if not, then unchanged
// Returns:
//      true if auto inc column exists, false otherwise
//
bool ha_tokudb::has_auto_increment_flag(uint* index) {
    //
    // check to see if we have auto increment field
    //
    bool ai_found = false;
    uint ai_index = 0;
    for (uint i = 0; i < table_share->fields; i++, ai_index++) {
        Field* field = table->field[i];
        if (field->flags & AUTO_INCREMENT_FLAG) {
            ai_found = true;
            *index = ai_index;
            break;
        }
    }
    return ai_found;
}

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int open_status_dictionary(DB** ptr, const char* name, DB_TXN* txn) {
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    int error;
    char* newname = NULL;
    uint open_mode = DB_THREAD;
    newname = (char *)my_malloc(
        get_max_dict_name_path_length(name), 
        MYF(MY_WME)
        );
    if (newname == NULL) {
        error = ENOMEM;
        goto cleanup;
    }
    make_name(newname, name, "status");
    if (tokudb_debug & TOKUDB_DEBUG_OPEN) {
        TOKUDB_TRACE("open:%s\n", newname);
    }
    error = db_create(ptr, db_env, 0);
    if (error) { goto cleanup; }
    
    error = (*ptr)->open((*ptr), txn, newname, NULL, DB_BTREE, open_mode, 0);
    if (error) { 
        goto cleanup; 
    }
cleanup:
    if (error) {
        if (*ptr) {
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            int r = (*ptr)->close(*ptr, 0);
            assert(r==0);
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            *ptr = NULL;
        }
    }
    my_free(newname, MYF(MY_ALLOW_ZERO_PTR));
    return error;
}

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int ha_tokudb::open_main_dictionary(const char* name, bool is_read_only, DB_TXN* txn) {
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    int error;    
    char* newname = NULL;
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    uint open_flags = (is_read_only ? DB_RDONLY : 0) | DB_THREAD;
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    assert(share->file == NULL);
    assert(share->key_file[primary_key] == NULL);

    newname = (char *)my_malloc(
        get_max_dict_name_path_length(name),
        MYF(MY_WME|MY_ZEROFILL)
        );
    if (newname == NULL) { 
        error = ENOMEM;
        goto exit;
    }
    make_name(newname, name, "main");

    error = db_create(&share->file, db_env, 0);
    if (error) {
        goto exit;
    }
    share->key_file[primary_key] = share->file;
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    error = share->file->open(share->file, txn, newname, NULL, DB_BTREE, open_flags, 0);
    if (error) {
        goto exit;
    }
    
    if (tokudb_debug & TOKUDB_DEBUG_OPEN) {
        TOKUDB_TRACE("open:%s:file=%p\n", newname, share->file);
    }
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    error = 0;
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exit:
    if (error) {
        if (share->file) {
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            int r = share->file->close(
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                share->file,
                0
                );
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            assert(r==0);
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            share->file = NULL;
            share->key_file[primary_key] = NULL;
        }
    }
    my_free(newname, MYF(MY_ALLOW_ZERO_PTR));
    return error;
}
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//
// Open a secondary table, the key will be a secondary index, the data will be a primary key
//
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int ha_tokudb::open_secondary_dictionary(DB** ptr, KEY* key_info, const char* name, bool is_read_only, DB_TXN* txn) {
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    int error = ENOSYS;
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    char dict_name[MAX_DICT_NAME_LEN];
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    uint open_flags = (is_read_only ? DB_RDONLY : 0) | DB_THREAD;
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    char* newname = NULL;
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    uint newname_len = 0;
    
    sprintf(dict_name, "key-%s", key_info->name);

    newname_len = get_max_dict_name_path_length(name);
    newname = (char *)my_malloc(newname_len, MYF(MY_WME|MY_ZEROFILL));
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    if (newname == NULL) {
        error = ENOMEM;
        goto cleanup;
    }
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    make_name(newname, name, dict_name);
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    if ((error = db_create(ptr, db_env, 0))) {
        my_errno = error;
        goto cleanup;
    }
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    if ((error = (*ptr)->open(*ptr, txn, newname, NULL, DB_BTREE, open_flags, 0))) {
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        my_errno = error;
        goto cleanup;
    }
    if (tokudb_debug & TOKUDB_DEBUG_OPEN) {
        TOKUDB_TRACE("open:%s:file=%p\n", newname, *ptr);
    }
cleanup:
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    if (error) {
        if (*ptr) {
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            int r = (*ptr)->close(*ptr, 0);
            assert(r==0);
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            *ptr = NULL;
        }
    }
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    my_free(newname, MYF(MY_ALLOW_ZERO_PTR));
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    return error;
}

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int initialize_col_pack_info(KEY_AND_COL_INFO* kc_info, TABLE_SHARE* table_share, uint keynr) {
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    int error = ENOSYS;
    //
    // set up the cp_info
    //
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    assert(kc_info->cp_info[keynr] == NULL);
    kc_info->cp_info[keynr] = (COL_PACK_INFO *)my_malloc(
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        table_share->fields*sizeof(COL_PACK_INFO), 
        MYF(MY_WME | MY_ZEROFILL)
        );
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    if (kc_info->cp_info[keynr] == NULL) {
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        error = ENOMEM;
        goto exit;
    }
    {
    u_int32_t curr_fixed_offset = 0;
    u_int32_t curr_var_index = 0;
    for (uint j = 0; j < table_share->fields; j++) {
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        COL_PACK_INFO* curr = &kc_info->cp_info[keynr][j];
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        //
        // need to set the offsets / indexes
        // offsets are calculated AFTER the NULL bytes
        //
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        if (!bitmap_is_set(&kc_info->key_filters[keynr],j)) {
            if (kc_info->field_lengths[j]) {
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                curr->col_pack_val = curr_fixed_offset;
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                curr_fixed_offset += kc_info->field_lengths[j];
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            }
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            else if (kc_info->length_bytes[j]) {
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                curr->col_pack_val = curr_var_index;
                curr_var_index++;
            }
        }
    }
    
    //
    // set up the mcp_info
    //
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    kc_info->mcp_info[keynr].fixed_field_size = get_fixed_field_size(
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        kc_info,
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        table_share,
        keynr
        );
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    kc_info->mcp_info[keynr].len_of_offsets = get_len_of_offsets(
        kc_info,
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        table_share,
        keynr
        );

    error = 0;
    }
exit:
    return error;
}

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// reset the kc_info state at keynr
static void reset_key_and_col_info(KEY_AND_COL_INFO *kc_info, uint keynr) {
    bitmap_clear_all(&kc_info->key_filters[keynr]);
    my_free(kc_info->cp_info[keynr], MYF(MY_ALLOW_ZERO_PTR));
    kc_info->cp_info[keynr] = NULL;
    kc_info->mcp_info[keynr] = (MULTI_COL_PACK_INFO) { 0, 0 };
}

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int initialize_key_and_col_info(TABLE_SHARE* table_share, TABLE* table, KEY_AND_COL_INFO* kc_info, uint hidden_primary_key, uint primary_key) {
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    int error = 0;
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    u_int32_t curr_blob_field_index = 0;
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    u_int32_t max_var_bytes = 0;
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    //
    // fill in the field lengths. 0 means it is a variable sized field length
    // fill in length_bytes, 0 means it is fixed or blob
    //
    for (uint i = 0; i < table_share->fields; i++) {
        Field* field = table_share->field[i];
        TOKU_TYPE toku_type = mysql_to_toku_type(field);
        uint32 pack_length = 0;
        switch (toku_type) {
        case toku_type_int:
        case toku_type_double:
        case toku_type_float:
        case toku_type_fixbinary:
        case toku_type_fixstring:
            pack_length = field->pack_length();
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            assert(pack_length < 1<<16);
            kc_info->field_lengths[i] = (u_int16_t)pack_length;
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            kc_info->length_bytes[i] = 0;
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            break;
        case toku_type_blob:
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            kc_info->field_lengths[i] = 0;
            kc_info->length_bytes[i] = 0;
            kc_info->blob_fields[curr_blob_field_index] = i;
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            curr_blob_field_index++;
            break;
        case toku_type_varstring:
        case toku_type_varbinary:
            //
            // meaning it is variable sized
            //
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            kc_info->field_lengths[i] = 0;
            kc_info->length_bytes[i] = (uchar)((Field_varstring *)field)->length_bytes;
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            max_var_bytes += field->field_length;
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            break;
        default:
            assert(false);
        }
    }
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    kc_info->num_blobs = curr_blob_field_index;
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    //
    // initialize share->num_offset_bytes
    // because MAX_REF_LENGTH is 65536, we
    // can safely set num_offset_bytes to 1 or 2
    //
    if (max_var_bytes < 256) {
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        kc_info->num_offset_bytes = 1;
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    }
    else {
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        kc_info->num_offset_bytes = 2;
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    }


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    for (uint i = 0; i < table_share->keys + test(hidden_primary_key); i++) {
        //
        // do the cluster/primary key filtering calculations
        //
        if (! (i==primary_key && hidden_primary_key) ){        
            if ( i == primary_key ) {
                set_key_filter(
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                    &kc_info->key_filters[primary_key],
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                    &table_share->key_info[primary_key],
                    table,
                    true
                    );
            }
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            else {
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                set_key_filter(
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                    &kc_info->key_filters[i],
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                    &table_share->key_info[i],
                    table,
                    true
                    );
                if (!hidden_primary_key) {
                    set_key_filter(
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                        &kc_info->key_filters[i],
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                        &table_share->key_info[primary_key],
                        table,
                        true
                        );
                }
            }
        }
        if (i == primary_key || table_share->key_info[i].flags & HA_CLUSTERING) {
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            error = initialize_col_pack_info(kc_info,table_share,i);
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            if (error) {
                goto exit;
            }
        }

    }
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exit:
    return error;
}
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bool ha_tokudb::can_replace_into_be_fast(TABLE_SHARE* table_share, KEY_AND_COL_INFO* kc_info, uint pk) {
    uint curr_num_DBs = table_share->keys + test(hidden_primary_key);
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    bool ret_val;
    if (curr_num_DBs == 1) {
        ret_val = true;
        goto exit;
    }
    ret_val = true;
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    for (uint curr_index = 0; curr_index < table_share->keys; curr_index++) {
        if (curr_index == pk) continue;
        KEY* curr_key_info = &table_share->key_info[curr_index];
        for (uint i = 0; i < curr_key_info->key_parts; i++) {
            uint16 curr_field_index = curr_key_info->key_part[i].field->field_index;
            if (!bitmap_is_set(&kc_info->key_filters[curr_index],curr_field_index)) {
                ret_val = false;
                goto exit;
            }
            if (bitmap_is_set(&kc_info->key_filters[curr_index], curr_field_index) &&
                !bitmap_is_set(&kc_info->key_filters[pk], curr_field_index)) {
                ret_val = false;
                goto exit;
            }
            
        }
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    }
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exit:
    return ret_val;
}
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int ha_tokudb::initialize_share(
    const char* name,
    int mode
    )
{
    int error = 0;
    u_int64_t num_rows = 0;
    bool table_exists;
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    DB_TXN* txn = NULL;
    bool do_commit = false;
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    THD* thd = ha_thd();
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    tokudb_trx_data *trx = NULL;
    trx = (tokudb_trx_data *) thd_data_get(ha_thd(), tokudb_hton->slot);
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    if (thd_sql_command(thd) == SQLCOM_CREATE_TABLE && trx && trx->sub_sp_level) {
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        txn = trx->sub_sp_level;
    }
    else {
        do_commit = true;
        error = db_env->txn_begin(db_env, 0, &txn, 0);
        if (error) { goto exit; }
    }

1654 1655 1656
    DBUG_PRINT("info", ("share->use_count %u", share->use_count));

    table_exists = true;
1657
    error = check_table_in_metadata(name, &table_exists, txn);
1658 1659 1660 1661 1662 1663 1664 1665 1666

    if (error) {
        goto exit;
    }
    if (!table_exists) {
        sql_print_error("table %s does not exist in metadata, was it moved from someplace else? Not opening table", name);
        error = HA_ADMIN_FAILED;
        goto exit;
    }
1667

1668
    error = get_status(txn);
1669 1670 1671
    if (error) {
        goto exit;
    }
1672
    if (share->version != HA_TOKU_VERSION) {
1673 1674 1675 1676 1677 1678 1679 1680 1681
        error = ENOSYS;
        goto exit;
    }

    //
    // verify frm file is what we expect it to be
    // only for tables that are not partitioned
    //
    if (table->part_info == NULL) {
1682
        error = verify_frm_data(table->s->path.str, txn);
1683 1684 1685 1686
        if (error) {
            goto exit;
        }
    }
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    error = initialize_key_and_col_info(
        table_share,
        table, 
        &share->kc_info,
        hidden_primary_key,
        primary_key
        );
1694
    if (error) { goto exit; }
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1695
    
1696
    error = open_main_dictionary(name, mode == O_RDONLY, txn);
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    if (error) { goto exit; }

    share->has_unique_keys = false;
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    /* Open other keys;  These are part of the share structure */
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    for (uint i = 0; i < table_share->keys + test(hidden_primary_key); i++) {
        if (table_share->key_info[i].flags & HA_NOSAME) {
            share->has_unique_keys = true;
        }
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        if (i != primary_key) {
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            error = open_secondary_dictionary(
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                &share->key_file[i],
                &table_share->key_info[i],
                name,
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                mode == O_RDONLY,
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                txn
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                );
            if (error) {
                goto exit;
            }
        }
    }
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    share->replace_into_fast = can_replace_into_be_fast(
        table_share, 
        &share->kc_info, 
        primary_key
        );
        
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    if (!hidden_primary_key) {
        //
        // We need to set the ref_length to start at 5, to account for
        // the "infinity byte" in keys, and for placing the DBT size in the first four bytes
        //
        ref_length = sizeof(u_int32_t) + sizeof(uchar);
        KEY_PART_INFO *key_part = table->key_info[primary_key].key_part;
        KEY_PART_INFO *end = key_part + table->key_info[primary_key].key_parts;
        for (; key_part != end; key_part++) {
            ref_length += key_part->field->max_packed_col_length(key_part->length);
        }
        share->status |= STATUS_PRIMARY_KEY_INIT;
    }
    share->ref_length = ref_length;

1739
    error = estimate_num_rows(share->file,&num_rows, txn);
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    //
    // estimate_num_rows should not fail under normal conditions
    //
    if (error == 0) {
        share->rows = num_rows;
    }
    else {
        goto exit;
    }
    //
    // initialize auto increment data
    //
    share->has_auto_inc = has_auto_increment_flag(&share->ai_field_index);
    if (share->has_auto_inc) {
        init_auto_increment();
    }

1757
    if (may_table_be_empty(NULL)) {
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        share->try_table_lock = true;
    }
    else {
        share->try_table_lock = false;
    }

1764 1765
    share->num_DBs = table_share->keys + test(hidden_primary_key);

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    error = 0;
exit:
1768 1769 1770
    if (do_commit && txn) {
        commit_txn(txn,0);
    }
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    return error;
}

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//
// Creates and opens a handle to a table which already exists in a tokudb
// database.
// Parameters:
//      [in]   name - table name
//             mode - seems to specify if table is read only
//             test_if_locked - unused
// Returns:
//      0 on success
//      1 on error
//
1787
int ha_tokudb::open(const char *name, int mode, uint test_if_locked) {
1788
    TOKUDB_DBUG_ENTER("ha_tokudb::open %p %s", this, name);
1789
    THD* thd = ha_thd();
1790

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    int error = 0;
    int ret_val = 0;
1793
    uint curr_num_DBs = 0;
1794

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    transaction = NULL;
    cursor = NULL;

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1799 1800 1801 1802 1803 1804
    /* Open primary key */
    hidden_primary_key = 0;
    if ((primary_key = table_share->primary_key) >= MAX_KEY) {
        // No primary key
        primary_key = table_share->keys;
        key_used_on_scan = MAX_KEY;
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        hidden_primary_key = TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH;
        ref_length = TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH + sizeof(u_int32_t);
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    } 
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    else {
1809
        key_used_on_scan = primary_key;
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    }
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    curr_num_DBs = table_share->keys + test(hidden_primary_key);
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1813
    /* Need some extra memory in case of packed keys */
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1814
    // the "+ 1" is for the first byte that states +/- infinity
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    // multiply everything by 2 to account for clustered keys having a key and primary key together
    max_key_length = 2*(table_share->max_key_length + MAX_REF_PARTS * 3 + sizeof(uchar));
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    alloc_ptr = my_multi_malloc(MYF(MY_WME),
        &key_buff, max_key_length, 
        &key_buff2, max_key_length, 
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        &key_buff3, max_key_length, 
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        &prelocked_left_range, max_key_length, 
        &prelocked_right_range, max_key_length, 
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        &primary_key_buff, (hidden_primary_key ? 0 : max_key_length),
        &fixed_cols_for_query, table_share->fields*sizeof(u_int32_t),
        &var_cols_for_query, table_share->fields*sizeof(u_int32_t),
        NullS
        );
    if (alloc_ptr == NULL) {
        ret_val = 1;
        goto exit;
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    }

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    size_range_query_buff = get_tokudb_read_buf_size(thd);
    range_query_buff = (uchar *)my_malloc(size_range_query_buff, MYF(MY_WME));
    if (range_query_buff == NULL) {
        ret_val = 1;
        goto exit;
    }

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    alloced_rec_buff_length = table_share->rec_buff_length + table_share->fields;
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    rec_buff = (uchar *) my_malloc(alloced_rec_buff_length, MYF(MY_WME));
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    if (rec_buff == NULL) {
        ret_val = 1;
        goto exit;
1845
    }
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1847 1848 1849 1850 1851 1852 1853
    alloced_update_rec_buff_length = alloced_rec_buff_length;
    rec_update_buff = (uchar *) my_malloc(alloced_update_rec_buff_length, MYF(MY_WME));
    if (rec_update_buff == NULL) {
        ret_val = 1;
        goto exit;
    }

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    for (u_int32_t i = 0; i < sizeof(mult_key_dbt)/sizeof(mult_key_dbt[0]); i++) {
        mult_key_dbt[i].flags = DB_DBT_REALLOC;
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    }

    for (u_int32_t i = 0; i < curr_num_DBs; i++) {
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        mult_rec_dbt[i].flags = DB_DBT_REALLOC;
1860 1861
    }

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    /* Init shared structure */
    share = get_share(name, table_share);
    if (share == NULL) {
        ret_val = 1;
        goto exit;
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    }

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    thr_lock_data_init(&share->lock, &lock, NULL);

    /* Fill in shared structure, if needed */
    pthread_mutex_lock(&share->mutex);
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    if (tokudb_debug & TOKUDB_DEBUG_OPEN) {
1874 1875
        TOKUDB_TRACE("tokudbopen:%p:share=%p:file=%p:table=%p:table->s=%p:%d\n", 
                     this, share, share->file, table, table->s, share->use_count);
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    }
1877
    if (!share->use_count++) {
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        ret_val = initialize_share(
            name,
            mode
            );
        if (ret_val) {
1883
            free_share(share, 1);
1884
            goto exit;
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        }
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    }
    ref_length = share->ref_length;     // If second open
    pthread_mutex_unlock(&share->mutex);

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    key_read = false;
1891
    stats.block_size = 1<<20;    // QQQ Tokudb DB block size
1892

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    init_hidden_prim_key_info();

1895 1896
    info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST);

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exit:
    if (ret_val) {
1899 1900
        my_free(range_query_buff, MYF(MY_ALLOW_ZERO_PTR));
        range_query_buff = NULL;
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        my_free(alloc_ptr, MYF(MY_ALLOW_ZERO_PTR));
        alloc_ptr = NULL;
        my_free(rec_buff, MYF(MY_ALLOW_ZERO_PTR));
        rec_buff = NULL;
1905 1906
        my_free(rec_update_buff, MYF(MY_ALLOW_ZERO_PTR));
        rec_update_buff = NULL;
1907
        
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        if (error) {
            my_errno = error;
        }
    }
    TOKUDB_DBUG_RETURN(ret_val);
1913 1914
}

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//
// estimate the number of rows in a DB
// Parameters:
//      [in]    db - DB whose number of rows will be estimated
//      [out]   num_rows - number of estimated rows in db
// Returns:
//      0 on success
//      error otherwise
//
1924
int ha_tokudb::estimate_num_rows(DB* db, u_int64_t* num_rows, DB_TXN* txn) {
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    int error = ENOSYS;
    DBC* crsr = NULL;
    bool do_commit = false;
1928
    DB_BTREE_STAT64 dict_stats;
1929
    DB_TXN* txn_to_use = NULL;
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1931 1932
    if (txn == NULL) {
        error = db_env->txn_begin(db_env, 0, &txn_to_use, DB_READ_UNCOMMITTED);
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        if (error) goto cleanup;
        do_commit = true;
    }
1936 1937 1938
    else {
        txn_to_use = txn;
    }
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1940 1941
    error = db->stat64(
        share->file, 
1942
        txn_to_use, 
1943
        &dict_stats
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        );
1945
    if (error) { goto cleanup; }
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1947
    *num_rows = dict_stats.bt_ndata;
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    error = 0;
cleanup:
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1950
    if (crsr != NULL) {
1951 1952
        int r = crsr->c_close(crsr);
        assert(r==0);
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        crsr = NULL;
    }
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    if (do_commit) {
1956 1957
        commit_txn(txn_to_use, 0);
        txn_to_use = NULL;
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    }
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    return error;
}

1962

1963
int ha_tokudb::write_to_status(DB* db, HA_METADATA_KEY curr_key_data, void* data, uint size, DB_TXN* txn ){
1964
    return write_metadata(db, &curr_key_data, sizeof curr_key_data, data, size, txn);
1965 1966
}

1967 1968 1969
int ha_tokudb::remove_from_status(DB *db, HA_METADATA_KEY curr_key_data, DB_TXN *txn) {
    return remove_metadata(db, &curr_key_data, sizeof curr_key_data, txn);
}
1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008

int ha_tokudb::remove_metadata(DB* db, void* key_data, uint key_size, DB_TXN* transaction){
    int error;
    DBT key;
    DB_TXN* txn = NULL;
    bool do_commit = false;
    //
    // transaction to be used for putting metadata into status.tokudb
    //
    if (transaction == NULL) {
        error = db_env->txn_begin(db_env, 0, &txn, 0);
        if (error) { 
            goto cleanup;
        }
        do_commit = true;
    }
    else {
        txn = transaction;
    }

    bzero(&key, sizeof(key));
    key.data = key_data;
    key.size = key_size;
    error = db->del(db, txn, &key, DB_DELETE_ANY);
    if (error) { 
        goto cleanup; 
    }
    
    error = 0;
cleanup:
    if (do_commit && txn) {
        if (!error) {
            commit_txn(txn, DB_TXN_NOSYNC);
        }
        else {
            abort_txn(txn);
        }
    }
    return error;
2009 2010
}

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//
// helper function to write a piece of metadata in to status.tokudb
//
2014
int ha_tokudb::write_metadata(DB* db, void* key_data, uint key_size, void* val_data, uint val_size, DB_TXN* transaction ){
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2015 2016 2017 2018
    int error;
    DBT key;
    DBT value;
    DB_TXN* txn = NULL;
2019
    bool do_commit = false;
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    //
    // transaction to be used for putting metadata into status.tokudb
    //
2023 2024 2025 2026 2027 2028 2029 2030 2031
    if (transaction == NULL) {
        error = db_env->txn_begin(db_env, 0, &txn, 0);
        if (error) { 
            goto cleanup;
        }
        do_commit = true;
    }
    else {
        txn = transaction;
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    }

    bzero(&key, sizeof(key));
    bzero(&value, sizeof(value));
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    key.data = key_data;
    key.size = key_size;
    value.data = val_data;
    value.size = val_size;
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    error = db->put(db, txn, &key, &value, 0);
    if (error) { 
        goto cleanup; 
    }
    
    error = 0;
cleanup:
2047
    if (do_commit && txn) {
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        if (!error) {
2049
            commit_txn(txn, DB_TXN_NOSYNC);
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        }
        else {
2052
            abort_txn(txn);
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        }
    }
    return error;
}

2058
int ha_tokudb::write_frm_data(DB* db, DB_TXN* txn, const char* frm_name) {
2059 2060
    TOKUDB_DBUG_ENTER("ha_tokudb::write_frm_data, %s", frm_name);

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    uchar* frm_data = NULL;
    size_t frm_len = 0;
    int error = 0;

    error = readfrm(frm_name,&frm_data,&frm_len);
    if (error) { goto cleanup; }
    
    error = write_to_status(db,hatoku_frm_data,frm_data,(uint)frm_len, txn);
    if (error) { goto cleanup; }

    error = 0;
cleanup:
    my_free(frm_data, MYF(MY_ALLOW_ZERO_PTR));
    TOKUDB_DBUG_RETURN(error);
}

2077 2078 2079 2080
int ha_tokudb::remove_frm_data(DB *db, DB_TXN *txn) {
    return remove_from_status(db, hatoku_frm_data, txn);
}

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static int
smart_dbt_callback_verify_frm (DBT const *key, DBT  const *row, void *context) {
    DBT* stored_frm = (DBT *)context;
    stored_frm->size = row->size;
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    stored_frm->data = (uchar *)my_malloc(row->size, MYF(MY_WME));
    assert(stored_frm->data);
    memcpy(stored_frm->data, row->data, row->size);
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    return 0;
}

2091
int ha_tokudb::verify_frm_data(const char* frm_name, DB_TXN* txn) {
2092
    TOKUDB_DBUG_ENTER("ha_tokudb::verify_frm_data %s", frm_name);
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    uchar* mysql_frm_data = NULL;
    size_t mysql_frm_len = 0;
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    DBT key, stored_frm;
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    int error = 0;
    HA_METADATA_KEY curr_key = hatoku_frm_data;

    bzero(&key, sizeof(key));
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    bzero(&stored_frm, sizeof(&stored_frm));
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    // get the frm data from MySQL
    error = readfrm(frm_name,&mysql_frm_data,&mysql_frm_len);
    if (error) { goto cleanup; }

    key.data = &curr_key;
    key.size = sizeof(curr_key);
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    error = share->status_block->getf_set(
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        share->status_block, 
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        txn,
        0,
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        &key, 
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        smart_dbt_callback_verify_frm, 
        &stored_frm
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        );
    if (error == DB_NOTFOUND) {
        // if not found, write it
        error = write_frm_data(
            share->status_block,
            txn,
            frm_name
            );
        goto cleanup;
    }
    else if (error) {
        goto cleanup;
    }

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    if (stored_frm.size != mysql_frm_len || 
        memcmp(stored_frm.data, mysql_frm_data, stored_frm.size))
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    {
        error = HA_ERR_TABLE_DEF_CHANGED;
        goto cleanup;
    }
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    error = 0;
cleanup:
    my_free(mysql_frm_data, MYF(MY_ALLOW_ZERO_PTR));
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    my_free(stored_frm.data, MYF(MY_ALLOW_ZERO_PTR));
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    TOKUDB_DBUG_RETURN(error);
}
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//
// Updates status.tokudb with a new max value used for the auto increment column
// Parameters:
//      [in]    db - this will always be status.tokudb
//              val - value to store
//  Returns:
//      0 on success, error otherwise
//
//
int ha_tokudb::update_max_auto_inc(DB* db, ulonglong val){
2152
    return write_to_status(db,hatoku_max_ai,&val,sizeof(val), NULL);
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}

//
// Writes the initial auto increment value, as specified by create table
// so if a user does "create table t1 (a int auto_increment, primary key (a)) auto_increment=100",
// then the value 100 will be stored here in val
// Parameters:
//      [in]    db - this will always be status.tokudb
//              val - value to store
//  Returns:
//      0 on success, error otherwise
//
//
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int ha_tokudb::write_auto_inc_create(DB* db, ulonglong val, DB_TXN* txn){
    return write_to_status(db,hatoku_ai_create_value,&val,sizeof(val), txn);
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}
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//
// Closes a handle to a table. 
//
2174
int ha_tokudb::close(void) {
2175
    TOKUDB_DBUG_ENTER("ha_tokudb::close %p", this);
2176
    TOKUDB_DBUG_RETURN(__close(0));
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}

int ha_tokudb::__close(int mutex_is_locked) {
2180
    TOKUDB_DBUG_ENTER("ha_tokudb::__close %p", this);
2181
    if (tokudb_debug & TOKUDB_DEBUG_OPEN) 
2182
        TOKUDB_TRACE("close:%p\n", this);
2183
    my_free(rec_buff, MYF(MY_ALLOW_ZERO_PTR));
2184
    my_free(rec_update_buff, MYF(MY_ALLOW_ZERO_PTR));
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    my_free(blob_buff, MYF(MY_ALLOW_ZERO_PTR));
2186
    my_free(alloc_ptr, MYF(MY_ALLOW_ZERO_PTR));
2187
    my_free(range_query_buff, MYF(MY_ALLOW_ZERO_PTR));
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    for (u_int32_t i = 0; i < sizeof(mult_rec_dbt)/sizeof(mult_rec_dbt[0]); i++) {
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        if (mult_rec_dbt[i].flags == DB_DBT_REALLOC &&
                mult_rec_dbt[i].data != NULL) {
            free(mult_rec_dbt[i].data);
        }
2193
    }
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    for (u_int32_t i = 0; i < sizeof(mult_key_dbt)/sizeof(mult_key_dbt[0]); i++) {
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        if (mult_key_dbt[i].flags == DB_DBT_REALLOC &&
                mult_key_dbt[i].data != NULL) {
            free(mult_key_dbt[i].data);
        }
2199
    }
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    rec_buff = NULL;
2201
    rec_update_buff = NULL;
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    alloc_ptr = NULL;
2203
    ha_tokudb::reset();
2204
    TOKUDB_DBUG_RETURN(free_share(share, mutex_is_locked));
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}

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//
// Reallocate record buffer (rec_buff) if needed
// If not needed, does nothing
// Parameters:
//          length - size of buffer required for rec_buff
//
2213
bool ha_tokudb::fix_rec_buff_for_blob(ulong length) {
2214
    if (!rec_buff || (length > alloced_rec_buff_length)) {
2215
        uchar *newptr;
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        if (!(newptr = (uchar *) my_realloc((void *) rec_buff, length, MYF(MY_ALLOW_ZERO_PTR))))
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            return 1;
        rec_buff = newptr;
        alloced_rec_buff_length = length;
    }
    return 0;
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}

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//
// Reallocate record buffer (rec_buff) if needed
// If not needed, does nothing
// Parameters:
//          length - size of buffer required for rec_buff
//
bool ha_tokudb::fix_rec_update_buff_for_blob(ulong length) {
    if (!rec_update_buff || (length > alloced_update_rec_buff_length)) {
        uchar *newptr;
        if (!(newptr = (uchar *) my_realloc((void *) rec_update_buff, length, MYF(MY_ALLOW_ZERO_PTR))))
            return 1;
        rec_update_buff= newptr;
        alloced_update_rec_buff_length = length;
    }
    return 0;
}

2241
/* Calculate max length needed for row */
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ulong ha_tokudb::max_row_length(const uchar * buf) {
    ulong length = table_share->reclength + table_share->fields * 2;
    uint *ptr, *end;
    for (ptr = table_share->blob_field, end = ptr + table_share->blob_fields; ptr != end; ptr++) {
        Field_blob *blob = ((Field_blob *) table->field[*ptr]);
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        length += blob->get_length((uchar *) (buf + field_offset(blob, table))) + 2;
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    }
    return length;
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}

/*
*/
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//
// take the row passed in as a DBT*, and convert it into a row in MySQL format in record
// Pack a row for storage.
// If the row is of fixed length, just store the  row 'as is'.
// If not, we will generate a packed row suitable for storage.
// This will only fail if we don't have enough memory to pack the row,
// which may only happen in rows with blobs, as the default row length is
// pre-allocated.
// Parameters:
//      [out]   row - row stored in DBT to be converted
2264
//      [out]   buf - buffer where row is packed
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//      [in]    record - row in MySQL format
//
2267

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int ha_tokudb::pack_row_in_buff(
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    DBT * row, 
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    const uchar* record,
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    uint index,
    uchar* row_buff
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    ) 
{
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    uchar* fixed_field_ptr = NULL;
    uchar* var_field_offset_ptr = NULL;
    uchar* start_field_data_ptr = NULL;
    uchar* var_field_data_ptr = NULL;
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    int r = ENOSYS;
2280
    bzero((void *) row, sizeof(*row));
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    my_bitmap_map *old_map = dbug_tmp_use_all_columns(table, table->write_set);
    
2284

2285
    /* Copy null bits */
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    memcpy(row_buff, record, table_share->null_bytes);
    fixed_field_ptr = row_buff + table_share->null_bytes;
2288
    var_field_offset_ptr = fixed_field_ptr + share->kc_info.mcp_info[index].fixed_field_size;
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    start_field_data_ptr = var_field_offset_ptr + share->kc_info.mcp_info[index].len_of_offsets;
    var_field_data_ptr = var_field_offset_ptr + share->kc_info.mcp_info[index].len_of_offsets;
2291

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    //
    // assert that when the hidden primary key exists, primary_key_offsets is NULL
    //
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    for (uint i = 0; i < table_share->fields; i++) {
        Field* field = table->field[i];
        uint curr_field_offset = field_offset(field, table);
2298
        if (bitmap_is_set(&share->kc_info.key_filters[index],i)) {
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            continue;
        }
2301
        if (share->kc_info.field_lengths[i]) {
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            fixed_field_ptr = pack_fixed_field(
                fixed_field_ptr,
                record + curr_field_offset, 
2305
                share->kc_info.field_lengths[i]
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                );
        }
2308
        else if (share->kc_info.length_bytes[i]) {
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            var_field_data_ptr = pack_var_field(
                var_field_offset_ptr,
                var_field_data_ptr,
                start_field_data_ptr,
                record + curr_field_offset,
2314 2315
                share->kc_info.length_bytes[i],
                share->kc_info.num_offset_bytes
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                );
2317
            var_field_offset_ptr += share->kc_info.num_offset_bytes;
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        }
    }

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    for (uint i = 0; i < share->kc_info.num_blobs; i++) {
        Field* field = table->field[share->kc_info.blob_fields[i]];
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        var_field_data_ptr = pack_toku_field_blob(
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            var_field_data_ptr,
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            record + field_offset(field, table),
            field
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            );
2328
    }
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    row->data = row_buff;
    row->size = (size_t) (var_field_data_ptr - row_buff);
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    r = 0;

    dbug_tmp_restore_column_map(table->write_set, old_map);
    return r;
2336 2337
}

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2338

2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357
int ha_tokudb::pack_row(
    DBT * row, 
    const uchar* record,
    uint index
    )
{
    return pack_row_in_buff(row,record,index,rec_buff);
}

int ha_tokudb::pack_old_row_for_update(
    DBT * row, 
    const uchar* record,
    uint index
    )
{
    return pack_row_in_buff(row,record,index,rec_update_buff);
}


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2358
int ha_tokudb::unpack_blobs(
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    uchar* record,
    const uchar* from_tokudb_blob,
2361 2362
    u_int32_t num_bytes,
    bool check_bitmap
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    )
{
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    uint error = 0;
    uchar* ptr = NULL;
    const uchar* buff = NULL;
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    //
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    // assert that num_bytes > 0 iff share->num_blobs > 0
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    //
2371
    assert( !((share->kc_info.num_blobs == 0) && (num_bytes > 0)) );
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    if (num_bytes > num_blob_bytes) {
        ptr = (uchar *)my_realloc((void *)blob_buff, num_bytes, MYF(MY_ALLOW_ZERO_PTR));
        if (ptr == NULL) {
            error = ENOMEM;
            goto exit;
        }
        blob_buff = ptr;
        num_blob_bytes = num_bytes;
    }
    
    memcpy(blob_buff, from_tokudb_blob, num_bytes);
    buff= blob_buff;
2384
    for (uint i = 0; i < share->kc_info.num_blobs; i++) {
2385 2386 2387 2388 2389 2390
        u_int32_t curr_field_index = share->kc_info.blob_fields[i]; 
        bool skip = check_bitmap ? 
            !(bitmap_is_set(table->read_set,curr_field_index) || 
                bitmap_is_set(table->write_set,curr_field_index)) : 
            false;
        Field* field = table->field[curr_field_index];
2391
        u_int32_t len_bytes = field->row_pack_length();
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2392
        buff = unpack_toku_field_blob(
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            record + field_offset(field, table),
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            buff,
2395
            len_bytes,
2396
            skip
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            );
    }

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    error = 0;
exit:
    return error;
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}

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//
// take the row passed in as a DBT*, and convert it into a row in MySQL format in record
// Parameters:
//      [out]   record - row in MySQL format
//      [in]    row - row stored in DBT to be converted
//
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2411
int ha_tokudb::unpack_row(
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    uchar* record, 
    DBT const *row, 
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    DBT const *key,
    uint index
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    ) 
{
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    //
    // two cases, fixed length row, and variable length row
    // fixed length row is first below
    //
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2422
    /* Copy null bits */
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2423
    int error = 0;
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    const uchar* fixed_field_ptr = (const uchar *) row->data;
    const uchar* var_field_offset_ptr = NULL;
    const uchar* var_field_data_ptr = NULL;
    u_int32_t data_end_offset = 0;
    memcpy(record, fixed_field_ptr, table_share->null_bytes);
    fixed_field_ptr += table_share->null_bytes;
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2431
    var_field_offset_ptr = fixed_field_ptr + share->kc_info.mcp_info[index].fixed_field_size;
2432
    var_field_data_ptr = var_field_offset_ptr + share->kc_info.mcp_info[index].len_of_offsets;
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2433

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    //
    // unpack the key, if necessary
    //
    if (!(hidden_primary_key && index == primary_key)) {
        unpack_key(record,key,index);
    }

    u_int32_t last_offset = 0;
    //
    // we have two methods of unpacking, one if we need to unpack the entire row
    // the second if we unpack a subset of the entire row
    // first method here is if we unpack the entire row
    //
    if (unpack_entire_row) {
        //
        // fill in parts of record that are not part of the key
        //
        for (uint i = 0; i < table_share->fields; i++) {
            Field* field = table->field[i];
2453
            if (bitmap_is_set(&share->kc_info.key_filters[index],i)) {
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                continue;
            }
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2456

2457
            if (share->kc_info.field_lengths[i]) {
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                fixed_field_ptr = unpack_fixed_field(
                    record + field_offset(field, table),
                    fixed_field_ptr,
2461
                    share->kc_info.field_lengths[i]
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                    );
            }
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            //
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            // here, we DO modify var_field_data_ptr or var_field_offset_ptr
            // as we unpack variable sized fields
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            //
2468 2469
            else if (share->kc_info.length_bytes[i]) {
                switch (share->kc_info.num_offset_bytes) {
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                case (1):
                    data_end_offset = var_field_offset_ptr[0];
                    break;
                case (2):
                    data_end_offset = uint2korr(var_field_offset_ptr);
                    break;
                default:
                    assert(false);
                    break;
                }
                unpack_var_field(
                    record + field_offset(field, table),
                    var_field_data_ptr,
                    data_end_offset - last_offset,
2484
                    share->kc_info.length_bytes[i]
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                    );
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                var_field_offset_ptr += share->kc_info.num_offset_bytes;
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                var_field_data_ptr += data_end_offset - last_offset;
                last_offset = data_end_offset;
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            }
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        }
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        error = unpack_blobs(
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            record,
            var_field_data_ptr,
2494 2495
            row->size - (u_int32_t)(var_field_data_ptr - (const uchar *)row->data),
            false
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            );
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        if (error) {
            goto exit;
        }
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    }
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    //
    // in this case, we unpack only what is specified 
    // in fixed_cols_for_query and var_cols_for_query
    //
2505
    else {
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        //
        // first the fixed fields
        //
        for (u_int32_t i = 0; i < num_fixed_cols_for_query; i++) {
            uint field_index = fixed_cols_for_query[i];
            Field* field = table->field[field_index];
            unpack_fixed_field(
                record + field_offset(field, table),
2514 2515
                fixed_field_ptr + share->kc_info.cp_info[index][field_index].col_pack_val,
                share->kc_info.field_lengths[field_index]
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                );
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        }

        //
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        // now the var fields
        // here, we do NOT modify var_field_data_ptr or var_field_offset_ptr
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        //
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        for (u_int32_t i = 0; i < num_var_cols_for_query; i++) {
            uint field_index = var_cols_for_query[i];
            Field* field = table->field[field_index];
2526
            u_int32_t var_field_index = share->kc_info.cp_info[index][field_index].col_pack_val;
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            u_int32_t data_start_offset;
2528
            u_int32_t field_len;
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            get_var_field_info(
                &field_len, 
                &data_start_offset, 
                var_field_index, 
                var_field_offset_ptr, 
                share->kc_info.num_offset_bytes
                );
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            unpack_var_field(
                record + field_offset(field, table),
                var_field_data_ptr + data_start_offset,
2541 2542
                field_len,
                share->kc_info.length_bytes[field_index]
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                );
        }

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        if (read_blobs) {
            //
            // now the blobs
            //
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            get_blob_field_info(
                &data_end_offset, 
                share->kc_info.mcp_info[index].len_of_offsets,
                var_field_data_ptr, 
                share->kc_info.num_offset_bytes
                );
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            var_field_data_ptr += data_end_offset;
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            error = unpack_blobs(
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                record,
                var_field_data_ptr,
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                row->size - (u_int32_t)(var_field_data_ptr - (const uchar *)row->data),
                true
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                );
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            if (error) {
                goto exit;
            }
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        }
2568
    }
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    error = 0;
exit:
    return error;
2572 2573
}

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u_int32_t ha_tokudb::place_key_into_mysql_buff(
    KEY* key_info, 
    uchar * record, 
    uchar* data
    ) 
{
2580
    KEY_PART_INFO *key_part = key_info->key_part, *end = key_part + key_info->key_parts;
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    uchar *pos = data;
2582 2583

    for (; key_part != end; key_part++) {
2584 2585
        if (key_part->field->null_bit) {
            uint null_offset = get_null_offset(table, key_part->field);
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            if (*pos++ == NULL_COL_VAL) { // Null value
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                //
                // We don't need to reset the record data as we will not access it
                // if the null data is set
                //            
2591
                record[null_offset] |= key_part->field->null_bit;
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                continue;
            }
2594
            record[null_offset] &= ~key_part->field->null_bit;
2595
        }
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        //
        // HOPEFULLY TEMPORARY
        //
        assert(table->s->db_low_byte_first);
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        pos = unpack_toku_key_field(
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            record + field_offset(key_part->field, table),
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            pos,
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            key_part->field,
            key_part->length
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            );
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    }
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    return pos-data;
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}

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//
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// Store the key and the primary key into the row
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// Parameters:
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//      [out]   record - key stored in MySQL format
//      [in]    key - key stored in DBT to be converted
//              index -index into key_file that represents the DB 
//                  unpacking a key of
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//
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void ha_tokudb::unpack_key(uchar * record, DBT const *key, uint index) {
    u_int32_t bytes_read;
    uchar *pos = (uchar *) key->data + 1;
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    bytes_read = place_key_into_mysql_buff(
        &table->key_info[index], 
        record, 
        pos
        );
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    if( (index != primary_key) && !hidden_primary_key) {
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        //
        // also unpack primary key
        //
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        place_key_into_mysql_buff(
            &table->key_info[primary_key], 
            record, 
            pos+bytes_read
            );
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    }
}
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u_int32_t ha_tokudb::place_key_into_dbt_buff(
    KEY* key_info, 
    uchar * buff, 
    const uchar * record, 
    bool* has_null, 
    int key_length
    ) 
{
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    KEY_PART_INFO *key_part = key_info->key_part;
    KEY_PART_INFO *end = key_part + key_info->key_parts;
    uchar* curr_buff = buff;
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    *has_null = false;
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    for (; key_part != end && key_length > 0; key_part++) {
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        //
        // accessing key_part->field->null_bit instead off key_part->null_bit
        // because key_part->null_bit is not set in add_index
        // filed ticket 862 to look into this
        //
        if (key_part->field->null_bit) {
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            /* Store 0 if the key part is a NULL part */
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            uint null_offset = get_null_offset(table, key_part->field);
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            if (record[null_offset] & key_part->field->null_bit) {
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                *curr_buff++ = NULL_COL_VAL;
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                *has_null = true;
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                continue;
            }
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            *curr_buff++ = NONNULL_COL_VAL;        // Store NOT NULL marker
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        }
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        //
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        // HOPEFULLY TEMPORARY
        //
        assert(table->s->db_low_byte_first);
        //
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        // accessing field_offset(key_part->field) instead off key_part->offset
        // because key_part->offset is SET INCORRECTLY in add_index
        // filed ticket 862 to look into this
        //
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        curr_buff = pack_toku_key_field(
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            curr_buff,
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            (uchar *) (record + field_offset(key_part->field, table)),
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            key_part->field,
            key_part->length
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            );
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        key_length -= key_part->length;
    }
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    return curr_buff - buff;
}



//
// Create a packed key from a row. This key will be written as such
// to the index tree.  This will never fail as the key buffer is pre-allocated.
// Parameters:
//      [out]   key - DBT that holds the key
//      [in]    key_info - holds data about the key, such as it's length and offset into record
//      [out]   buff - buffer that will hold the data for key (unless 
//                  we have a hidden primary key)
//      [in]    record - row from which to create the key
//              key_length - currently set to MAX_KEY_LENGTH, is it size of buff?
// Returns:
//      the parameter key
//

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DBT* ha_tokudb::create_dbt_key_from_key(
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    DBT * key,
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    KEY* key_info, 
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    uchar * buff,
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    const uchar * record, 
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    bool* has_null,
    bool dont_pack_pk,
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    int key_length
    ) 
{
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    u_int32_t size = 0;
    uchar* tmp_buff = buff;
    my_bitmap_map *old_map = dbug_tmp_use_all_columns(table, table->write_set);

    key->data = buff;

    //
    // first put the "infinity" byte at beginning. States if missing columns are implicitly
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    // positive infinity or negative infinity or zero. For this, because we are creating key
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    // from a row, there is no way that columns can be missing, so in practice,
    // this will be meaningless. Might as well put in a value
    //
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    *tmp_buff++ = COL_ZERO;
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    size++;
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    size += place_key_into_dbt_buff(
        key_info, 
        tmp_buff, 
        record, 
        has_null, 
        key_length
        );
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    if (!dont_pack_pk) {
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        tmp_buff = buff + size;
        if (hidden_primary_key) {
            memcpy_fixed(tmp_buff, current_ident, TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH);
            size += TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH;
        }
        else {
            bool tmp_bool = false;
            size += place_key_into_dbt_buff(
                &table->key_info[primary_key], 
                tmp_buff, 
                record, 
                &tmp_bool, 
                MAX_KEY_LENGTH //this parameter does not matter
                );
        }
    }

    key->size = size;
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    DBUG_DUMP("key", (uchar *) key->data, key->size);
    dbug_tmp_restore_column_map(table->write_set, old_map);
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    return key;
}


//
// Create a packed key from a row. This key will be written as such
// to the index tree.  This will never fail as the key buffer is pre-allocated.
// Parameters:
//      [out]   key - DBT that holds the key
//              keynr - index for which to create the key
//      [out]   buff - buffer that will hold the data for key (unless 
//                  we have a hidden primary key)
//      [in]    record - row from which to create the key
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//      [out]   has_null - says if the key has a NULL value for one of its columns
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//              key_length - currently set to MAX_KEY_LENGTH, is it size of buff?
// Returns:
//      the parameter key
//
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DBT *ha_tokudb::create_dbt_key_from_table(
    DBT * key, 
    uint keynr, 
    uchar * buff, 
    const uchar * record, 
    bool* has_null, 
    int key_length
    ) 
{
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    TOKUDB_DBUG_ENTER("ha_tokudb::create_dbt_key_from_table");
    bzero((void *) key, sizeof(*key));
    if (hidden_primary_key && keynr == primary_key) {
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        key->data = buff;
        memcpy(buff, &current_ident, TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH);
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        key->size = TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH;
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        *has_null = false;
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        DBUG_RETURN(key);
    }
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    DBUG_RETURN(create_dbt_key_from_key(key, &table->key_info[keynr],buff,record, has_null, (keynr == primary_key), key_length));
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}

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DBT* ha_tokudb::create_dbt_key_for_lookup(
    DBT * key, 
    KEY* key_info, 
    uchar * buff, 
    const uchar * record, 
    bool* has_null, 
    int key_length
    )
{
    TOKUDB_DBUG_ENTER("ha_tokudb::create_dbt_key_from_lookup");
    DBUG_RETURN(create_dbt_key_from_key(key, key_info, buff, record, has_null, true, key_length));    
}
2805

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//
// Create a packed key from from a MySQL unpacked key (like the one that is
// sent from the index_read() This key is to be used to read a row
// Parameters:
//      [out]   key - DBT that holds the key
//              keynr - index for which to pack the key
//      [out]   buff - buffer that will hold the data for key
//      [in]    key_ptr - MySQL unpacked key
//              key_length - length of key_ptr
// Returns:
//      the parameter key
//
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DBT *ha_tokudb::pack_key(
    DBT * key, 
    uint keynr, 
    uchar * buff, 
    const uchar * key_ptr, 
    uint key_length, 
2824
    int8_t inf_byte
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    ) 
{
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    TOKUDB_DBUG_ENTER("ha_tokudb::pack_key");
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    KEY *key_info = &table->key_info[keynr];
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    KEY_PART_INFO *key_part = key_info->key_part;
    KEY_PART_INFO *end = key_part + key_info->key_parts;
    my_bitmap_map *old_map = dbug_tmp_use_all_columns(table, table->write_set);

    bzero((void *) key, sizeof(*key));
    key->data = buff;

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    //
    // first put the "infinity" byte at beginning. States if missing columns are implicitly
    // positive infinity or negative infinity
    //
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    *buff++ = (uchar)inf_byte;
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    for (; key_part != end && (int) key_length > 0; key_part++) {
        uint offset = 0;
        if (key_part->null_bit) {
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            if (!(*key_ptr == 0)) {
                *buff++ = NULL_COL_VAL;
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                key_length -= key_part->store_length;
                key_ptr += key_part->store_length;
                continue;
            }
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            *buff++ = NONNULL_COL_VAL;
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            offset = 1;         // Data is at key_ptr+1
        }
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        assert(table->s->db_low_byte_first);

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        buff = pack_key_toku_key_field(
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            buff,
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            (uchar *) key_ptr + offset,
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            key_part->field,
            key_part->length
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            );
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        key_ptr += key_part->store_length;
        key_length -= key_part->store_length;
    }
    key->size = (buff - (uchar *) key->data);
    DBUG_DUMP("key", (uchar *) key->data, key->size);
    dbug_tmp_restore_column_map(table->write_set, old_map);
    DBUG_RETURN(key);
2870 2871
}

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//
// get max used hidden primary key value
//
void ha_tokudb::init_hidden_prim_key_info() {
    TOKUDB_DBUG_ENTER("ha_tokudb::init_prim_key_info");
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    pthread_mutex_lock(&share->mutex);
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    if (!(share->status & STATUS_PRIMARY_KEY_INIT)) {
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        int error = 0;
        THD* thd = ha_thd();
        DB_TXN* txn = NULL;
        DBC* c = NULL;
        tokudb_trx_data *trx = NULL;
        trx = (tokudb_trx_data *) thd_data_get(ha_thd(), tokudb_hton->slot);
        bool do_commit = false;
        if (thd_sql_command(thd) == SQLCOM_CREATE_TABLE && trx && trx->sub_sp_level) {
            txn = trx->sub_sp_level;
        }
        else {
            do_commit = true;
            error = db_env->txn_begin(db_env, 0, &txn, 0);
            assert(error == 0);
        }
        
        error = share->key_file[primary_key]->cursor(
            share->key_file[primary_key],
            txn,
            &c,
            0
            );
        assert(error == 0);
        DBT key,val;        
        bzero(&key, sizeof(key));
        bzero(&val, sizeof(val));
        error = c->c_get(c, &key, &val, DB_LAST);
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        if (error == 0) {
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            assert(key.size == TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH);
            share->auto_ident = hpk_char_to_num((uchar *)key.data);
        }
        error = c->c_close(c);
        assert(error == 0);
        if (do_commit) {
            commit_txn(txn, 0);
2914
        }
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        share->status |= STATUS_PRIMARY_KEY_INIT;
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    }
    pthread_mutex_unlock(&share->mutex);
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    DBUG_VOID_RETURN;
}
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/** @brief
    Get metadata info stored in status.tokudb
    */
2926
int ha_tokudb::get_status(DB_TXN* txn) {
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    TOKUDB_DBUG_ENTER("ha_tokudb::get_status");
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    DBT key, value;
    HA_METADATA_KEY curr_key;
    int error;
2931

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    //
    // open status.tokudb
    //
    if (!share->status_block) {
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        error = open_status_dictionary(
            &share->status_block, 
            share->table_name, 
2939
            txn
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            );
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        if (error) { 
            goto cleanup; 
        }
2944
    }
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    //
    // transaction to be used for putting metadata into status.tokudb
    //
    bzero(&key, sizeof(key));
    bzero(&value, sizeof(value));
    key.data = &curr_key;
    key.size = sizeof(curr_key);
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    value.flags = DB_DBT_USERMEM;
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    assert(share->status_block);
    //
    // get version
    //
    value.ulen = sizeof(share->version);
    value.data = &share->version;
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    curr_key = hatoku_new_version;
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    error = share->status_block->get(
        share->status_block, 
        txn, 
        &key, 
        &value, 
        0
        );
    if (error == DB_NOTFOUND) {
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        //
        // hack to keep handle the issues of going back and forth
        // between 5.0.3 to 5.0.4
        // the problem with going back and forth
        // is with storing the frm file, 5.0.4 stores it, 5.0.3 does not
        // so, if a user goes back and forth and alters the schema
        // the frm stored can get out of sync with the schema of the table
        // This can cause issues.
        // To take care of this, we are doing this versioning work here.
        // We change the key that stores the version. 
        // In 5.0.3, it is hatoku_old_version, in 5.0.4 it is hatoku_new_version
        // When we encounter a table that does not have hatoku_new_version
        // set, we give it the right one, and overwrite the old one with zero.
        // This ensures that 5.0.3 cannot open the table. Once it has been opened by 5.0.4
        //
        uint dummy_version = 0;
        share->version = HA_TOKU_ORIG_VERSION;
        error = write_to_status(
            share->status_block, 
            hatoku_new_version,
            &share->version,
            sizeof(share->version), 
            txn
            );
        if (error) { goto cleanup; }
        error = write_to_status(
            share->status_block, 
            hatoku_old_version,
            &dummy_version,
            sizeof(dummy_version), 
            txn
            );
        if (error) { goto cleanup; }
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    }
    else if (error || value.size != sizeof(share->version)) {
        if (error == 0) {
            error = HA_ERR_INTERNAL_ERROR;
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        }
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        goto cleanup;
    }
    //
    // get capabilities
    //
    curr_key = hatoku_capabilities;
    value.ulen = sizeof(share->capabilities);
    value.data = &share->capabilities;
    error = share->status_block->get(
        share->status_block, 
        txn, 
        &key, 
        &value, 
        0
        );
    if (error == DB_NOTFOUND) {
        share->capabilities= 0;
    }
    else if (error || value.size != sizeof(share->version)) {
        if (error == 0) {
            error = HA_ERR_INTERNAL_ERROR;
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        }
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        goto cleanup;
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    }
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    error = 0;
cleanup:
    TOKUDB_DBUG_RETURN(error);
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}

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/** @brief
    Return an estimated of the number of rows in the table.
    Used when sorting to allocate buffers and by the optimizer.
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    This is used in filesort.cc. 
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*/
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ha_rows ha_tokudb::estimate_rows_upper_bound() {
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    TOKUDB_DBUG_ENTER("ha_tokudb::estimate_rows_upper_bound");
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    DBUG_RETURN(share->rows + HA_TOKUDB_EXTRA_ROWS);
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}
3047

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//
// Function that compares two primary keys that were saved as part of rnd_pos
// and ::position
//
3052
int ha_tokudb::cmp_ref(const uchar * ref1, const uchar * ref2) {
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    int ret_val = 0;
    ret_val = tokudb_compare_two_keys(
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        ref1 + sizeof(u_int32_t),
        *(u_int32_t *)ref1,
        ref2 + sizeof(u_int32_t),
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3058
        *(u_int32_t *)ref2,
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        (uchar *)share->file->descriptor->dbt.data + 4,
        *(u_int32_t *)share->file->descriptor->dbt.data - 4,
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3061
        false
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        );
    return ret_val;
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}

3066
bool ha_tokudb::check_if_incompatible_data(HA_CREATE_INFO * info, uint table_changes) {
3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079
  //
  // This is a horrendous hack for now, as copied by InnoDB.
  // This states that if the auto increment create field has changed,
  // via a "alter table foo auto_increment=new_val", that this
  // change is incompatible, and to rebuild the entire table
  // This will need to be fixed
  //
  if ((info->used_fields & HA_CREATE_USED_AUTO) &&
      info->auto_increment_value != 0) {

    return COMPATIBLE_DATA_NO;
  }
  if (table_changes != IS_EQUAL_YES)
3080
    return COMPATIBLE_DATA_NO;
3081
  return COMPATIBLE_DATA_YES;
3082
}
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3083

3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095
//
// Method that is called before the beginning of many calls
// to insert rows (ha_tokudb::write_row). There is no guarantee
// that start_bulk_insert is called, however there is a guarantee
// that if start_bulk_insert is called, then end_bulk_insert may be
// called as well.
// Parameters:
//      [in]    rows - an estimate of the number of rows that will be inserted
//                     if number of rows is unknown (such as if doing 
//                     "insert into foo select * from bar), then rows 
//                     will be 0
//
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//
// This function returns true if the table MAY be empty.
// It is NOT meant to be a 100% check for emptiness.
// This is used for a bulk load optimization.
//
3101
bool ha_tokudb::may_table_be_empty(DB_TXN *txn) {
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    int error;
    bool ret_val = false;
    DBC* tmp_cursor = NULL;
3105
    DB_TXN* tmp_txn = NULL;
3106

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    if (txn == NULL) {
        error = db_env->txn_begin(db_env, 0, &tmp_txn, 0);
        if (error) {
            goto cleanup;
        }
        txn = tmp_txn;
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    }

    error = share->file->cursor(share->file, txn, &tmp_cursor, 0);
    if (error) {
        goto cleanup;
    }
    error = tmp_cursor->c_getf_next(tmp_cursor, 0, smart_dbt_do_nothing, NULL);
    if (error == DB_NOTFOUND) {
        ret_val = true;
    }
    else {
        ret_val = false;
    }
    error = 0;
cleanup:
    if (tmp_cursor) {
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        int r = tmp_cursor->c_close(tmp_cursor);
        assert(r==0);
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        tmp_cursor = NULL;
    }
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    if (tmp_txn) {
        commit_txn(tmp_txn, 0);
        tmp_txn = NULL;
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    }
    return ret_val;
}

3140
void ha_tokudb::start_bulk_insert(ha_rows rows) {
3141 3142
    TOKUDB_DBUG_ENTER("ha_tokudb::start_bulk_insert");
    THD* thd = ha_thd();
3143
    tokudb_trx_data* trx = (tokudb_trx_data *) thd_data_get(thd, tokudb_hton->slot);
3144
    delay_updating_ai_metadata = true;
3145
    ai_metadata_update_required = false;
3146
    abort_loader = false;
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    rw_rdlock(&share->num_DBs_lock);
    uint curr_num_DBs = table->s->keys + test(hidden_primary_key);
    num_DBs_locked_in_bulk = true;
    lock_count = 0;
    
3153
    if (share->try_table_lock) {
3154
        if (get_prelock_empty(thd) && may_table_be_empty(transaction)) {
3155
            if (using_ignore || get_load_save_space(thd)) {
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                acquire_table_lock(transaction, lock_write);
            }
            else {
                mult_dbt_flags[primary_key] = 0;
                if (!thd_test_options(thd, OPTION_RELAXED_UNIQUE_CHECKS) && !hidden_primary_key) {
                    mult_put_flags[primary_key] = DB_NOOVERWRITE;
                }
                int error = db_env->create_loader(
                    db_env, 
                    transaction, 
                    &loader, 
                    NULL, // no src_db needed
                    curr_num_DBs, 
                    share->key_file, 
                    mult_put_flags,
                    mult_dbt_flags,
                    0
                    );
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                if (error) { 
                    assert(loader == NULL);
                    goto exit_try_table_lock;
                }
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                lc.thd = thd;
                lc.ha = this;
                
                error = loader->set_poll_function(loader, poll_fun, &lc);
                assert(!error);

                error = loader->set_error_callback(loader, loader_dup_fun, &lc);
                assert(!error);
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                trx->stmt_progress.using_loader = true;
3189
            }
3190
        }
3191
    exit_try_table_lock:
3192
        pthread_mutex_lock(&share->mutex);
3193
        share->try_table_lock = false;
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        pthread_mutex_unlock(&share->mutex);
    }
3196
    DBUG_VOID_RETURN;
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}

//
// Method that is called at the end of many calls to insert rows
// (ha_tokudb::write_row). If start_bulk_insert is called, then
// this is guaranteed to be called.
//
3204
int ha_tokudb::end_bulk_insert(bool abort) {
3205
    TOKUDB_DBUG_ENTER("ha_tokudb::end_bulk_insert");
3206
    int error = 0;
3207
    THD* thd = ha_thd();
3208
    tokudb_trx_data* trx = (tokudb_trx_data *) thd_data_get(thd, tokudb_hton->slot);
3209
    bool using_loader = (loader != NULL);
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    if (ai_metadata_update_required) {
        pthread_mutex_lock(&share->mutex);
        error = update_max_auto_inc(share->status_block, share->last_auto_increment);
        pthread_mutex_unlock(&share->mutex);
3214
        if (error) { goto cleanup; }
3215 3216 3217
    }
    delay_updating_ai_metadata = false;
    ai_metadata_update_required = false;
3218 3219
    loader_error = 0;
    if (loader) {
3220
        if (!abort_loader && !thd->killed) {
3221 3222
            error = loader->close(loader);
            loader = NULL;
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            if (error) { 
                if (thd->killed) {
                    my_error(ER_QUERY_INTERRUPTED, MYF(0));
                }
                goto cleanup; 
            }
3229 3230 3231 3232

            for (uint i = 0; i < table_share->keys; i++) {
                if (table_share->key_info[i].flags & HA_NOSAME) {
                    bool is_unique;
3233 3234 3235
                    if (i == primary_key) {
                        continue;
                    }
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                    error = is_index_unique(
                        &is_unique, 
                        transaction, 
                        share->key_file[i], 
                        &table->key_info[i]
                        );
                    if (error) goto cleanup;
                    if (!is_unique) {
                        error = HA_ERR_FOUND_DUPP_KEY;
                        last_dup_key = i;
                        goto cleanup;
                    }
                }
            }
        }
        else {
3252 3253
            error = sprintf(write_status_msg, "aborting bulk load"); 
            thd_proc_info(thd, write_status_msg);
3254 3255
            loader->abort(loader);
            loader = NULL;
3256
            share->try_table_lock = true;
3257 3258 3259 3260
        }
    }

cleanup:
3261 3262 3263 3264 3265 3266
    if (num_DBs_locked_in_bulk) {
        rw_unlock(&share->num_DBs_lock);
    }
    num_DBs_locked_in_bulk = false;
    lock_count = 0;

3267
    if (loader) {
3268 3269
        error = sprintf(write_status_msg, "aborting bulk load"); 
        thd_proc_info(thd, write_status_msg);
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        loader->abort(loader);
        loader = NULL;
    }
    abort_loader = false;
    bzero(&lc,sizeof(lc));
    if (error || loader_error) {
        my_errno = error ? error : loader_error;
3277 3278 3279
        if (using_loader) {
            share->try_table_lock = true;
        }
3280
    }
3281
    trx->stmt_progress.using_loader = false;
3282
    TOKUDB_DBUG_RETURN(error ? error : loader_error);
3283 3284
}

3285 3286 3287
int ha_tokudb::end_bulk_insert() {
    return end_bulk_insert( false );
}
3288

3289 3290 3291 3292 3293
int ha_tokudb::is_index_unique(bool* is_unique, DB_TXN* txn, DB* db, KEY* key_info) {
    int error;
    DBC* tmp_cursor1 = NULL;
    DBC* tmp_cursor2 = NULL;
    DBT key1, key2, val, packed_key1, packed_key2;
3294
    u_int64_t cnt = 0;
3295
    char status_msg[MAX_ALIAS_NAME + 200]; //buffer of 200 should be a good upper bound.
3296
    THD* thd = ha_thd();
3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307
    bzero(&key1, sizeof(key1));
    bzero(&key2, sizeof(key2));
    bzero(&val, sizeof(val));
    bzero(&packed_key1, sizeof(packed_key1));
    bzero(&packed_key2, sizeof(packed_key2));
    *is_unique = true;
    
    error = db->cursor(
        db, 
        txn, 
        &tmp_cursor1, 
3308
        DB_SERIALIZABLE
3309 3310 3311 3312 3313 3314 3315
        );
    if (error) { goto cleanup; }

    error = db->cursor(
        db, 
        txn, 
        &tmp_cursor2,
3316
        DB_SERIALIZABLE
3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386
        );
    if (error) { goto cleanup; }

    
    error = tmp_cursor1->c_get(
        tmp_cursor1, 
        &key1, 
        &val, 
        DB_NEXT
        );
    if (error == DB_NOTFOUND) {
        *is_unique = true;
        error = 0;
        goto cleanup;
    }
    else if (error) { goto cleanup; }
    error = tmp_cursor2->c_get(
        tmp_cursor2, 
        &key2, 
        &val, 
        DB_NEXT
        );
    if (error) { goto cleanup; }

    error = tmp_cursor2->c_get(
        tmp_cursor2, 
        &key2, 
        &val, 
        DB_NEXT
        );
    if (error == DB_NOTFOUND) {
        *is_unique = true;
        error = 0;
        goto cleanup;
    }
    else if (error) { goto cleanup; }

    while (error != DB_NOTFOUND) {
        bool has_null1;
        bool has_null2;
        int cmp;
        place_key_into_mysql_buff(
            key_info,
            table->record[0], 
            (uchar *) key1.data + 1
            );
        place_key_into_mysql_buff(
            key_info,
            table->record[1], 
            (uchar *) key2.data + 1
            );
        
        create_dbt_key_for_lookup(
            &packed_key1,
            key_info,
            key_buff,
            table->record[0],
            &has_null1
            );
        create_dbt_key_for_lookup(
            &packed_key2,
            key_info,
            key_buff2,
            table->record[1],
            &has_null2
            );

        if (!has_null1 && !has_null2) {
            cmp = tokudb_prefix_cmp_dbt_key(db, &packed_key1, &packed_key2);
            if (cmp == 0) {
3387 3388 3389 3390 3391 3392
                memcpy(key_buff, key1.data, key1.size);
                place_key_into_mysql_buff(
                    key_info,
                    table->record[0], 
                    (uchar *) key_buff + 1
                    );
3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411
                *is_unique = false;
                break;
            }
        }

        error = tmp_cursor1->c_get(
            tmp_cursor1, 
            &key1, 
            &val, 
            DB_NEXT
            );
        if (error) { goto cleanup; }
        error = tmp_cursor2->c_get(
            tmp_cursor2, 
            &key2, 
            &val, 
            DB_NEXT
            );
        if (error && (error != DB_NOTFOUND)) { goto cleanup; }
3412 3413

        cnt++;
3414 3415 3416 3417
        if ((cnt % 10000) == 0) {
            sprintf(
                status_msg, 
                "Verifying index uniqueness: Checked %llu of %llu rows in key-%s.", 
3418
                (long long unsigned) cnt, 
3419 3420 3421
                share->rows, 
                key_info->name);
            thd_proc_info(thd, status_msg);
3422 3423 3424 3425 3426 3427
            if (thd->killed) {
                my_error(ER_QUERY_INTERRUPTED, MYF(0));
                error = ER_QUERY_INTERRUPTED;
                goto cleanup;
            }
        }
3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443
    }

    error = 0;

cleanup:
    if (tmp_cursor1) {
        tmp_cursor1->c_close(tmp_cursor1);
        tmp_cursor1 = NULL;
    }
    if (tmp_cursor2) {
        tmp_cursor2->c_close(tmp_cursor2);
        tmp_cursor2 = NULL;
    }
    return error;
}

3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476
int ha_tokudb::is_val_unique(bool* is_unique, uchar* record, KEY* key_info, uint dict_index, DB_TXN* txn) {
    DBT key;
    int error = 0;
    bool has_null;
    DBC* tmp_cursor = NULL;
    struct index_read_info ir_info;
    struct smart_dbt_info info;
    bzero((void *)&key, sizeof(key));
    info.ha = this;
    info.buf = NULL;
    info.keynr = dict_index;

    ir_info.smart_dbt_info = info;
    
    create_dbt_key_for_lookup(
        &key,
        key_info,
        key_buff3,
        record,
        &has_null
        );
    ir_info.orig_key = &key;

    if (has_null) {
        error = 0;
        *is_unique = true;
        goto cleanup;
    }
    
    error = share->key_file[dict_index]->cursor(
        share->key_file[dict_index], 
        txn, 
        &tmp_cursor, 
3477
        DB_SERIALIZABLE
3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521
        );
    if (error) { goto cleanup; }

    error = tmp_cursor->c_getf_set_range(
        tmp_cursor, 
        0, 
        &key, 
        smart_dbt_callback_lookup, 
        &ir_info
        );
    if (error == DB_NOTFOUND) {
        *is_unique = true;
        error = 0;
        goto cleanup;
    }
    else if (error) {
        goto cleanup;
    }
    if (ir_info.cmp) {
        *is_unique = true;
    }
    else {
        *is_unique = false;
    }
    error = 0;

cleanup:
    if (tmp_cursor) {
        int r = tmp_cursor->c_close(tmp_cursor);
        assert(r==0);
        tmp_cursor = NULL;
    }
    return error;
}

int ha_tokudb::do_uniqueness_checks(uchar* record, DB_TXN* txn, THD* thd) {
    int error;
    //
    // first do uniqueness checks
    //
    if (share->has_unique_keys && !thd_test_options(thd, OPTION_RELAXED_UNIQUE_CHECKS)) {
        for (uint keynr = 0; keynr < table_share->keys; keynr++) {
            bool is_unique_key = table->key_info[keynr].flags & HA_NOSAME;
            bool is_unique = false;
3522 3523 3524 3525 3526 3527
            //
            // don't need to do check for primary key
            //
            if (keynr == primary_key) {
                continue;
            }
3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549
            if (!is_unique_key) {
                continue;
            }
            //
            // if unique key, check uniqueness constraint
            // but, we do not need to check it if the key has a null
            // and we do not need to check it if unique_checks is off
            //
            error = is_val_unique(&is_unique, record, &table->key_info[keynr], keynr, txn);
            if (error) { goto cleanup; }
            if (!is_unique) {
                error = DB_KEYEXIST;
                last_dup_key = keynr;
                goto cleanup;
            }
        }
    }    
    error = 0;
cleanup:
    return error;
}

3550
void ha_tokudb::test_row_packing(uchar* record, DBT* pk_key, DBT* pk_val) {
3551 3552 3553 3554 3555 3556 3557 3558 3559 3560
    int error;
    DBT row, key;
    //
    // variables for testing key packing, only used in some debug modes
    //
    uchar* tmp_pk_key_data = NULL;
    uchar* tmp_pk_val_data = NULL;
    DBT tmp_pk_key;
    DBT tmp_pk_val;
    bool has_null;
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    int cmp;
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    bzero(&tmp_pk_key, sizeof(DBT));
    bzero(&tmp_pk_val, sizeof(DBT));

    //
    //use for testing the packing of keys
    //
    tmp_pk_key_data = (uchar *)my_malloc(pk_key->size, MYF(MY_WME));
    assert(tmp_pk_key_data);
    tmp_pk_val_data = (uchar *)my_malloc(pk_val->size, MYF(MY_WME));
    assert(tmp_pk_val_data);
    memcpy(tmp_pk_key_data, pk_key->data, pk_key->size);
    memcpy(tmp_pk_val_data, pk_val->data, pk_val->size);
    tmp_pk_key.data = tmp_pk_key_data;
    tmp_pk_key.size = pk_key->size;
    tmp_pk_val.data = tmp_pk_val_data;
    tmp_pk_val.size = pk_val->size;

    for (uint keynr = 0; keynr < table_share->keys; keynr++) {
        u_int32_t tmp_num_bytes = 0;
        uchar* row_desc = NULL;
        u_int32_t desc_size = 0;
        
        if (keynr == primary_key) {
            continue;
        }

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        create_dbt_key_from_table(&key, keynr, key_buff2, record, &has_null); 
3590 3591 3592 3593

        //
        // TEST
        //
3594
        row_desc = (uchar *)share->key_file[keynr]->descriptor->dbt.data;
3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605
        row_desc += (*(u_int32_t *)row_desc);
        desc_size = (*(u_int32_t *)row_desc) - 4;
        row_desc += 4;
        tmp_num_bytes = pack_key_from_desc(
            key_buff3,
            row_desc,
            desc_size,
            &tmp_pk_key,
            &tmp_pk_val
            );
        assert(tmp_num_bytes == key.size);
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        cmp = memcmp(key_buff3,key_buff2,tmp_num_bytes);
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        assert(cmp == 0);

        //
        // test key packing of clustering keys
        //
        if (table->key_info[keynr].flags & HA_CLUSTERING) {
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            error = pack_row(&row, (const uchar *) record, keynr);
3614
            assert(error == 0);
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            uchar* tmp_buff = NULL;
            tmp_buff = (uchar *)my_malloc(alloced_rec_buff_length,MYF(MY_WME));
            assert(tmp_buff);
3618
            row_desc = (uchar *)share->key_file[keynr]->descriptor->dbt.data;
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            row_desc += (*(u_int32_t *)row_desc);
            row_desc += (*(u_int32_t *)row_desc);
            desc_size = (*(u_int32_t *)row_desc) - 4;
            row_desc += 4;
            tmp_num_bytes = pack_clustering_val_from_desc(
                tmp_buff,
                row_desc,
                desc_size,
                &tmp_pk_val
                );
            assert(tmp_num_bytes == row.size);
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            cmp = memcmp(tmp_buff,rec_buff,tmp_num_bytes);
3631 3632 3633 3634 3635
            assert(cmp == 0);
            my_free(tmp_buff,MYF(MY_ALLOW_ZERO_PTR));
        }
    }

3636 3637 3638 3639
    //
    // copy stuff back out
    //
    error = pack_row(pk_val, (const uchar *) record, primary_key);
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    assert(pk_val->size == tmp_pk_val.size);
    cmp = memcmp(pk_val->data, tmp_pk_val_data, pk_val->size);    
    assert( cmp == 0);
3643

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    my_free(tmp_pk_key_data,MYF(MY_ALLOW_ZERO_PTR));
    my_free(tmp_pk_val_data,MYF(MY_ALLOW_ZERO_PTR));
}

3648 3649 3650
//
// set the put flags for the main dictionary
//
3651 3652
void ha_tokudb::set_main_dict_put_flags(
    THD* thd, 
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    bool opt_eligible,
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    u_int32_t* put_flags
3655 3656
    ) 
{
3657
    u_int32_t old_prelock_flags = 0;
3658 3659
    uint curr_num_DBs = table->s->keys + test(hidden_primary_key);
    bool in_hot_index = share->num_DBs > curr_num_DBs;
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    bool using_ignore_flag_opt = do_ignore_flag_optimization(
            thd, table, share->replace_into_fast);
3662
    //
3663
    // optimization for "REPLACE INTO..." (and "INSERT IGNORE") command
3664
    // if the command is "REPLACE INTO" and the only table
3665 3666
    // is the main table (or all indexes are a subset of the pk), 
    // then we can simply insert the element
3667 3668 3669
    // with DB_YESOVERWRITE. If the element does not exist,
    // it will act as a normal insert, and if it does exist, it 
    // will act as a replace, which is exactly what REPLACE INTO is supposed
3670
    // to do. We cannot do this if otherwise, because then we lose
3671 3672
    // consistency between indexes
    //
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    if (hidden_primary_key) 
    {
3675
        *put_flags = old_prelock_flags;
3676
    }
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3677 3678
    else if (thd_test_options(thd, OPTION_RELAXED_UNIQUE_CHECKS)
            && !is_replace_into(thd) && !is_insert_ignore(thd))
3679
    {
3680
        *put_flags = old_prelock_flags;
3681
    }
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3682 3683
    else if (using_ignore_flag_opt && is_replace_into(thd) 
            && !in_hot_index)
3684
    {
3685
        *put_flags = old_prelock_flags;
3686
    }
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3687
    else if (opt_eligible && using_ignore_flag_opt && is_insert_ignore(thd) 
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3688
            && !in_hot_index)
3689
    {
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3690
        *put_flags = DB_NOOVERWRITE_NO_ERROR | old_prelock_flags;
3691 3692 3693
    }
    else 
    {
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3694
        *put_flags = DB_NOOVERWRITE | old_prelock_flags;
3695
    }
3696 3697 3698 3699
}

int ha_tokudb::insert_row_to_main_dictionary(uchar* record, DBT* pk_key, DBT* pk_val, DB_TXN* txn) {
    int error = 0;
3700
    u_int32_t put_flags = mult_put_flags[primary_key];
3701 3702 3703 3704 3705
    THD *thd = ha_thd();
    uint curr_num_DBs = table->s->keys + test(hidden_primary_key);

    assert(curr_num_DBs == 1);
    
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3706
    set_main_dict_put_flags(thd, true, &put_flags);
3707

3708 3709 3710 3711 3712 3713 3714
    error = share->file->put(
        share->file, 
        txn, 
        pk_key,
        pk_val, 
        put_flags
        );
3715 3716 3717 3718 3719 3720 3721

    if (error) {
        last_dup_key = primary_key;
        goto cleanup;
    }

cleanup:
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3722 3723 3724
    return error;
}

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3725
int ha_tokudb::insert_rows_to_dictionaries_mult(DBT* pk_key, DBT* pk_val, DB_TXN* txn, THD* thd) {
3726
    int error = 0;
3727
    uint curr_num_DBs = share->num_DBs;
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3728
    set_main_dict_put_flags(thd, true, &mult_put_flags[primary_key]);
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    uint32_t i, flags = mult_put_flags[primary_key];

    // the insert ignore optimization uses DB_NOOVERWRITE_NO_ERROR, 
    // which is not allowed with env->put_multiple. 
    // we have to insert the rows one by one in this case.
    if (flags & DB_NOOVERWRITE_NO_ERROR) {
        DB * src_db = share->key_file[primary_key];
        for (i = 0; i < curr_num_DBs; i++) {
            DB * db = share->key_file[i];
            if (i == primary_key) {
                // if it's the primary key, insert the rows
                // as they are.
                error = db->put(db, txn, pk_key, pk_val, flags);
            } else {
                // generate a row for secondary keys.
                // use our multi put key/rec buffers
                // just as the ydb layer would have in
                // env->put_multiple(), except that
                // we will just do a put() right away.
                error = tokudb_generate_row(db, src_db,
                        &mult_key_dbt[i], &mult_rec_dbt[i], 
                        pk_key, pk_val);
                if (error != 0) {
                    goto out;
                }
                error = db->put(db, txn, &mult_key_dbt[i], 
                        &mult_rec_dbt[i], flags);
            }
            if (error != 0) {
                goto out;
            }
        }
    } else {
        // not insert ignore, so we can use put multiple
        error = db_env->put_multiple(
            db_env, 
            share->key_file[primary_key], 
            txn, 
            pk_key, 
            pk_val,
            curr_num_DBs, 
            share->key_file, 
            mult_key_dbt,
            mult_rec_dbt,
            mult_put_flags
            );
    }
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3776

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3777
out:
3778 3779 3780 3781 3782 3783
    //
    // We break if we hit an error, unless it is a dup key error
    // and MySQL told us to ignore duplicate key errors
    //
    if (error) {
        last_dup_key = primary_key;
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3784 3785 3786
    }
    return error;
}
3787

3788 3789
volatile int ha_tokudb_write_row_wait = 0; // debug

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3790 3791 3792 3793 3794 3795 3796 3797
//
// Stores a row in the table, called when handling an INSERT query
// Parameters:
//      [in]    record - a row in MySQL format
// Returns:
//      0 on success
//      error otherwise
//
3798
int ha_tokudb::write_row(uchar * record) {
3799
    TOKUDB_DBUG_ENTER("ha_tokudb::write_row");
3800 3801
    while (ha_tokudb_write_row_wait) sleep(1); // debug

3802
    DBT row, prim_key;
3803
    int error;
3804
    THD *thd = ha_thd();
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3805
    bool has_null;
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3806 3807
    DB_TXN* sub_trans = NULL;
    DB_TXN* txn = NULL;
3808
    tokudb_trx_data *trx = NULL;
3809
    uint curr_num_DBs;
3810
    bool create_sub_trans = false;
3811

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3812 3813 3814 3815
    //
    // some crap that needs to be done because MySQL does not properly abstract
    // this work away from us, namely filling in auto increment and setting auto timestamp
    //
3816
    statistic_increment(table->in_use->status_var.ha_write_count, &LOCK_status);
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3817
    if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_INSERT) {
3818
        table->timestamp_field->set_time();
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3819 3820
    }
    if (table->next_number_field && record == table->record[0]) {
3821
        update_auto_increment();
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3822
    }
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3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833

    //
    // check to see if some value for the auto increment column that is bigger
    // than anything else til now is being used. If so, update the metadata to reflect it
    // the goal here is we never want to have a dup key error due to a bad increment
    // of the auto inc field.
    //
    if (share->has_auto_inc && record == table->record[0]) {
        pthread_mutex_lock(&share->mutex);
        ulonglong curr_auto_inc = retrieve_auto_increment(
            table->field[share->ai_field_index]->key_type(), 
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3834
            field_offset(table->field[share->ai_field_index], table),
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3835 3836 3837
            record
            );
        if (curr_auto_inc > share->last_auto_increment) {
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3838
            share->last_auto_increment = curr_auto_inc;
3839 3840
            if (delay_updating_ai_metadata) {
                ai_metadata_update_required = true;
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3841
            }
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3842 3843 3844 3845
            else {
                update_max_auto_inc(share->status_block, share->last_auto_increment);
            }
         }
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3846 3847 3848
        pthread_mutex_unlock(&share->mutex);
    }

3849 3850 3851
    //
    // grab reader lock on numDBs_lock
    //
3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862
    if (!num_DBs_locked_in_bulk) {
        rw_rdlock(&share->num_DBs_lock);
    }
    else {
        lock_count++;
        if (lock_count >= 2000) {
            rw_unlock(&share->num_DBs_lock);
            rw_rdlock(&share->num_DBs_lock);
            lock_count = 0;
        }
    }
3863
    curr_num_DBs = share->num_DBs;
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3864 3865 3866 3867
    
    if (hidden_primary_key) {
        get_auto_primary_key(current_ident);
    }
3868

3869 3870 3871
    if (table_share->blob_fields) {
        if (fix_rec_buff_for_blob(max_row_length(record))) {
            error = HA_ERR_OUT_OF_MEM;
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            goto cleanup;
        }
    }
3875

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3876 3877
    create_dbt_key_from_table(&prim_key, primary_key, primary_key_buff, record, &has_null);
    if ((error = pack_row(&row, (const uchar *) record, primary_key))){
3878
        goto cleanup;
3879 3880
    }

3881
    create_sub_trans = (using_ignore && !(do_ignore_flag_optimization(thd,table,share->replace_into_fast)));
3882
    if (create_sub_trans) {
3883
        error = db_env->txn_begin(db_env, transaction, &sub_trans, DB_INHERIT_ISOLATION);
3884 3885 3886
        if (error) {
            goto cleanup;
        }
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3887
    }
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3888
    
3889
    txn = create_sub_trans ? sub_trans : transaction;    
3890 3891

    if (tokudb_debug & TOKUDB_DEBUG_CHECK_KEY) {
3892
        test_row_packing(record,&prim_key,&row);
3893
    }
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3894

3895 3896 3897 3898 3899 3900
    if (loader) {
        error = loader->put(loader, &prim_key, &row);
        if (error) {
            abort_loader = true;
            goto cleanup;
        }
3901 3902
    }
    else {
3903 3904 3905 3906 3907 3908
        if (curr_num_DBs == 1) {
            error = insert_row_to_main_dictionary(record,&prim_key, &row, txn);
            if (error) { goto cleanup; }
        }
        else {
            error = do_uniqueness_checks(record, txn, thd);
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3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934
            if (error) {
                // for #4633
                // if we have a duplicate key error, let's check the primary key to see
                // if there is a duplicate there. If so, set last_dup_key to the pk
                if (error == DB_KEYEXIST && !test(hidden_primary_key)) {
                    int r = share->file->getf_set(
                        share->file, 
                        txn, 
                        0, 
                        &prim_key, 
                        smart_dbt_do_nothing, 
                        NULL
                        );
                    if (r == 0) {
                        // if we get no error, that means the row
                        // was found and this is a duplicate key,
                        // so we set last_dup_key
                        last_dup_key = primary_key;
                    }
                    else if (r != DB_NOTFOUND) {
                        // if some other error is returned, return that to the user.
                        error = r;
                    }
                }
                goto cleanup; 
            }
3935

3936 3937 3938
            error = insert_rows_to_dictionaries_mult(&prim_key, &row, txn, thd);
            if (error) { goto cleanup; }
        }
3939
    }
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3940

3941
    trx = (tokudb_trx_data *) thd_data_get(thd, tokudb_hton->slot);
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3942 3943
    if (!error) {
        added_rows++;
3944 3945
        trx->stmt_progress.inserted++;
        track_progress(thd);
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3946 3947
    }
cleanup:
3948 3949 3950
    if (!num_DBs_locked_in_bulk) {
       rw_unlock(&share->num_DBs_lock);
    }
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3951
    if (error == DB_KEYEXIST) {
3952
        error = HA_ERR_FOUND_DUPP_KEY;
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3953
    }
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3954 3955 3956 3957 3958
    if (sub_trans) {
        // no point in recording error value of abort.
        // nothing we can do about it anyway and it is not what
        // we want to return.
        if (error) {
3959
            abort_txn(sub_trans);
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3960 3961
        }
        else {
3962
            commit_txn(sub_trans, DB_TXN_NOSYNC);
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3963 3964
        }
    }
3965
    TOKUDB_DBUG_RETURN(error);
3966 3967 3968
}

/* Compare if a key in a row has changed */
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3969 3970 3971 3972 3973
bool ha_tokudb::key_changed(uint keynr, const uchar * old_row, const uchar * new_row) {
    DBT old_key;
    DBT new_key;
    bzero((void *) &old_key, sizeof(old_key));
    bzero((void *) &new_key, sizeof(new_key));
3974

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3975 3976 3977 3978
    bool has_null;
    create_dbt_key_from_table(&new_key, keynr, key_buff2, new_row, &has_null);
    create_dbt_key_for_lookup(&old_key,&table->key_info[keynr], key_buff3, old_row, &has_null);
    return tokudb_prefix_cmp_dbt_key(share->key_file[keynr], &old_key, &new_key);
3979 3980
}

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3981 3982 3983 3984 3985 3986 3987 3988 3989
//
// Updates a row in the table, called when handling an UPDATE query
// Parameters:
//      [in]    old_row - row to be updated, in MySQL format
//      [in]    new_row - new row, in MySQL format
// Returns:
//      0 on success
//      error otherwise
//
3990
int ha_tokudb::update_row(const uchar * old_row, uchar * new_row) {
3991
    TOKUDB_DBUG_ENTER("update_row");
3992
    DBT prim_key, old_prim_key, prim_row, old_prim_row;
3993
    int error;
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3994 3995
    bool has_null;
    THD* thd = ha_thd();
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    DB_TXN* sub_trans = NULL;
    DB_TXN* txn = NULL;
3998
    tokudb_trx_data* trx = (tokudb_trx_data *) thd_data_get(thd, tokudb_hton->slot);
3999
    uint curr_num_DBs;
4000 4001

    LINT_INIT(error);
4002 4003 4004
    bzero((void *) &prim_key, sizeof(prim_key));
    bzero((void *) &old_prim_key, sizeof(old_prim_key));
    bzero((void *) &prim_row, sizeof(prim_row));
4005
    bzero((void *) &old_prim_row, sizeof(old_prim_row));
4006 4007


4008
    statistic_increment(table->in_use->status_var.ha_update_count, &LOCK_status);
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4009
    if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_UPDATE) {
4010
        table->timestamp_field->set_time();
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4011
    }
4012

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4013 4014 4015 4016 4017 4018 4019 4020 4021 4022
    //
    // check to see if some value for the auto increment column that is bigger
    // than anything else til now is being used. If so, update the metadata to reflect it
    // the goal here is we never want to have a dup key error due to a bad increment
    // of the auto inc field.
    //
    if (share->has_auto_inc && new_row == table->record[0]) {
        pthread_mutex_lock(&share->mutex);
        ulonglong curr_auto_inc = retrieve_auto_increment(
            table->field[share->ai_field_index]->key_type(), 
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4023
            field_offset(table->field[share->ai_field_index], table),
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4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034
            new_row
            );
        if (curr_auto_inc > share->last_auto_increment) {
            error = update_max_auto_inc(share->status_block, curr_auto_inc);
            if (!error) {
                share->last_auto_increment = curr_auto_inc;
            }
        }
        pthread_mutex_unlock(&share->mutex);
    }

4035 4036 4037 4038 4039 4040
    //
    // grab reader lock on numDBs_lock
    //
    rw_rdlock(&share->num_DBs_lock);
    curr_num_DBs = share->num_DBs;

4041 4042 4043 4044 4045
    if (using_ignore) {
        error = db_env->txn_begin(db_env, transaction, &sub_trans, DB_INHERIT_ISOLATION);
        if (error) {
            goto cleanup;
        }
4046
    }
4047
    txn = using_ignore ? sub_trans : transaction;
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4048 4049


4050 4051 4052 4053 4054
    if (hidden_primary_key) {
        bzero((void *) &prim_key, sizeof(prim_key));
        prim_key.data = (void *) current_ident;
        prim_key.size = TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH;
        old_prim_key = prim_key;
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4055 4056
    } 
    else {
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4057
        create_dbt_key_from_table(&prim_key, primary_key, key_buff, new_row, &has_null);
4058
        create_dbt_key_from_table(&old_prim_key, primary_key, primary_key_buff, old_row, &has_null);
4059 4060
    }

4061 4062 4063 4064 4065
    //
    // do uniqueness checks
    //
    if (share->has_unique_keys && !thd_test_options(thd, OPTION_RELAXED_UNIQUE_CHECKS)) {
        for (uint keynr = 0; keynr < table_share->keys; keynr++) {
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4066
            bool is_unique_key = table->key_info[keynr].flags & HA_NOSAME;
4067 4068
            if (keynr == primary_key) {
                continue;
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4069
            }
4070
            if (is_unique_key) {
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4071 4072
                bool key_ch = key_changed(keynr, old_row, new_row);
                if (key_ch) {
4073 4074 4075 4076 4077 4078 4079 4080
                    bool is_unique;
                    error = is_val_unique(&is_unique, new_row, &table->key_info[keynr], keynr, txn);
                    if (error) goto cleanup;
                    if (!is_unique) {
                        error = DB_KEYEXIST;
                        last_dup_key = keynr;
                        goto cleanup;
                    }
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                }
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            }
4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093
        }
    }
    
    if (table_share->blob_fields) {
        if (fix_rec_buff_for_blob(max_row_length(new_row))) {
            error = HA_ERR_OUT_OF_MEM;
            goto cleanup;
        }
        if (fix_rec_update_buff_for_blob(max_row_length(old_row))) {
            error = HA_ERR_OUT_OF_MEM;
            goto cleanup;
4094 4095
        }
    }
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4096

4097 4098 4099 4100 4101 4102
    error = pack_row(&prim_row, new_row, primary_key);
    if (error) { goto cleanup; }

    error = pack_old_row_for_update(&old_prim_row, old_row, primary_key);
    if (error) { goto cleanup; }

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4103
    set_main_dict_put_flags(thd, false, &mult_put_flags[primary_key]);
4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121

    error = db_env->update_multiple(
        db_env, 
        share->key_file[primary_key], 
        txn,
        &old_prim_key, 
        &old_prim_row,
        &prim_key, 
        &prim_row,
        curr_num_DBs, 
        share->key_file,
        mult_put_flags,
        2*curr_num_DBs, 
        mult_key_dbt,
        curr_num_DBs, 
        mult_rec_dbt
        );
    
4122 4123 4124 4125
    if (error == DB_KEYEXIST) {
        last_dup_key = primary_key;
    }    
    else if (!error) {
4126 4127
        trx->stmt_progress.updated++;
        track_progress(thd);
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4128
    }
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4131
cleanup:
4132
    rw_unlock(&share->num_DBs_lock);
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4133
    if (error == DB_KEYEXIST) {
4134
        error = HA_ERR_FOUND_DUPP_KEY;
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4135
    }
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    if (sub_trans) {
        // no point in recording error value of abort.
        // nothing we can do about it anyway and it is not what
        // we want to return.
        if (error) {
4141
            abort_txn(sub_trans);
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        }
        else {
4144
            commit_txn(sub_trans, DB_TXN_NOSYNC);
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        }
    }
4147
    TOKUDB_DBUG_RETURN(error);
4148 4149
}

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4150
//
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4151
// Deletes a row in the table, called when handling a DELETE query
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// Parameters:
//      [in]    record - row to be deleted, in MySQL format
// Returns:
//      0 on success
//      error otherwise
//
4158
int ha_tokudb::delete_row(const uchar * record) {
4159
    TOKUDB_DBUG_ENTER("ha_tokudb::delete_row");
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4160
    int error = ENOSYS;
4161
    DBT row, prim_key;
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4162
    bool has_null;
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4163
    THD* thd = ha_thd();
4164
    uint curr_num_DBs;
4165
    tokudb_trx_data* trx = (tokudb_trx_data *) thd_data_get(thd, tokudb_hton->slot);;
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4167 4168
    statistic_increment(table->in_use->status_var.ha_delete_count, &LOCK_status);

4169 4170 4171 4172 4173 4174
    //
    // grab reader lock on numDBs_lock
    //
    rw_rdlock(&share->num_DBs_lock);
    curr_num_DBs = share->num_DBs;

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    create_dbt_key_from_table(&prim_key, primary_key, key_buff, record, &has_null);
4176 4177 4178 4179 4180
    if (table_share->blob_fields) {
        if (fix_rec_buff_for_blob(max_row_length(record))) {
            error = HA_ERR_OUT_OF_MEM;
            goto cleanup;
        }
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4181
    }
4182 4183 4184
    if ((error = pack_row(&row, (const uchar *) record, primary_key))){
        goto cleanup;
    }
4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196

    error = db_env->del_multiple(
        db_env, 
        share->key_file[primary_key], 
        transaction, 
        &prim_key, 
        &row,
        curr_num_DBs, 
        share->key_file, 
        mult_key_dbt,
        mult_del_flags
        );
4197

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    if (error) {
        DBUG_PRINT("error", ("Got error %d", error));
4200
    }
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    else {
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4202
        deleted_rows++;
4203 4204
        trx->stmt_progress.deleted++;
        track_progress(thd);
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4205
    }
4206
cleanup:
4207
    rw_unlock(&share->num_DBs_lock);
4208
    TOKUDB_DBUG_RETURN(error);
4209 4210
}

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//
// takes as input table->read_set and table->write_set
// and puts list of field indexes that need to be read in
// unpack_row in the member variables fixed_cols_for_query
// and var_cols_for_query
//
void ha_tokudb::set_query_columns(uint keynr) {
    u_int32_t curr_fixed_col_index = 0;
    u_int32_t curr_var_col_index = 0;
    read_key = false;
    read_blobs = false;
    //
    // i know this is probably confusing and will need to be explained better
    //
    uint key_index = 0;

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    if (keynr == primary_key || keynr == MAX_KEY) {
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        key_index = primary_key;
    }
    else {
        key_index = (table->key_info[keynr].flags & HA_CLUSTERING ? keynr : primary_key);
    }
    for (uint i = 0; i < table_share->fields; i++) {
        if (bitmap_is_set(table->read_set,i) || 
            bitmap_is_set(table->write_set,i)
            ) 
        {
4238
            if (bitmap_is_set(&share->kc_info.key_filters[key_index],i)) {
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                read_key = true;
            }
            else {
                //
                // if fixed field length
                //
4245
                if (share->kc_info.field_lengths[i] != 0) {
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                    //
                    // save the offset into the list
                    //
                    fixed_cols_for_query[curr_fixed_col_index] = i;
                    curr_fixed_col_index++;
                }
                //
                // varchar or varbinary
                //
4255
                else if (share->kc_info.length_bytes[i] != 0) {
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                    var_cols_for_query[curr_var_col_index] = i;
                    curr_var_col_index++;
                }
                //
                // it is a blob
                //
                else {
                    read_blobs = true;
                }
            }
        }
    }
    num_fixed_cols_for_query = curr_fixed_col_index;
    num_var_cols_for_query = curr_var_col_index;
}

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4272
void ha_tokudb::column_bitmaps_signal() {
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    //
    // if we have max number of indexes, then MAX_KEY == primary_key
    //
    if (active_index != MAX_KEY || active_index == primary_key) {
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        set_query_columns(active_index);
    }
}
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4280

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//
// Notification that a scan of entire secondary table is about
// to take place. Will pre acquire table read lock
// Returns:
//      0 on success
//      error otherwise
//
int ha_tokudb::prepare_index_scan() {
4289
    int error = 0;
4290
    HANDLE_INVALID_CURSOR();
4291
    error = prelock_range(NULL, NULL);
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4292 4293 4294 4295 4296 4297 4298 4299 4300
    if (error) { last_cursor_error = error; goto cleanup; }

    range_lock_grabbed = true;
    error = 0;
cleanup:
    return error;
}


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4301 4302 4303 4304 4305 4306 4307
//
// Notification that a range query getting all elements that equal a key
//  to take place. Will pre acquire read lock
// Returns:
//      0 on success
//      error otherwise
//
4308
int ha_tokudb::prepare_index_key_scan(const uchar * key, uint key_len) {
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4309 4310
    int error = 0;
    DBT start_key, end_key;
4311
    THD* thd = ha_thd();
4312
    HANDLE_INVALID_CURSOR();
4313 4314 4315 4316
    pack_key(&start_key, active_index, prelocked_left_range, key, key_len, COL_NEG_INF);
    prelocked_left_range_size = start_key.size;
    pack_key(&end_key, active_index, prelocked_right_range, key, key_len, COL_POS_INF);
    prelocked_right_range_size = end_key.size;
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4318 4319 4320 4321 4322 4323
    error = cursor->c_pre_acquire_range_lock(
        cursor, 
        &start_key, 
        &end_key 
        );

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    if (error){ 
        goto cleanup; 
    }

    range_lock_grabbed = true;
4329
    doing_bulk_fetch = (thd_sql_command(thd) == SQLCOM_SELECT);
4330 4331
    bulk_fetch_iteration = 0;
    rows_fetched_using_bulk_fetch = 0;
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    error = 0;
cleanup:
    if (error) {
        last_cursor_error = error;
        //
4337 4338
        // cursor should be initialized here, but in case it is not, 
        // we still check
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4339 4340
        //
        if (cursor) {
4341 4342
            int r = cursor->c_close(cursor);
            assert(r==0);
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            cursor = NULL;
        }
    }
    return error;
}

4349 4350 4351 4352
void ha_tokudb::invalidate_bulk_fetch() {
    bytes_used_in_range_query_buff= 0;
    curr_range_query_buff_offset = 0;
}
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4353

4354 4355
volatile int ha_tokudb_index_init_wait = 0; // debug

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//
// Initializes local cursor on DB with index keynr
// Parameters:
//          keynr - key (index) number
//          sorted - 1 if result MUST be sorted according to index
// Returns:
//      0 on success
//      error otherwise
//
4365
int ha_tokudb::index_init(uint keynr, bool sorted) {
4366
    TOKUDB_DBUG_ENTER("ha_tokudb::index_init %p %d", this, keynr);
4367 4368
    while (ha_tokudb_index_init_wait) sleep(1); // debug

4369
    int error;
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4370
    THD* thd = ha_thd(); 
4371 4372 4373 4374 4375 4376 4377 4378
    DBUG_PRINT("enter", ("table: '%s'  key: %d", table_share->table_name.str, keynr));

    /*
       Under some very rare conditions (like full joins) we may already have
       an active cursor at this point
     */
    if (cursor) {
        DBUG_PRINT("note", ("Closing active cursor"));
4379 4380
        int r = cursor->c_close(cursor);
        assert(r==0);
4381 4382
    }
    active_index = keynr;
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4383
    last_cursor_error = 0;
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4384
    range_lock_grabbed = false;
4385
    DBUG_ASSERT(keynr <= table->s->keys);
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4386
    DBUG_ASSERT(share->key_file[keynr]);
4387
    cursor_flags = get_cursor_isolation_flags(lock.type, thd);
4388
    if (use_write_locks) {
4389
        cursor_flags |= DB_RMW;
4390 4391 4392 4393
    }
    if (get_disable_prefetching(thd)) {
        cursor_flags |= DBC_DISABLE_PREFETCHING;
    }
4394 4395
    if ((error = share->key_file[keynr]->cursor(share->key_file[keynr], transaction, &cursor, cursor_flags))) {
        if (error == TOKUDB_MVCC_DICTIONARY_TOO_NEW) {
4396
            error = HA_ERR_TABLE_DEF_CHANGED;
4397 4398
            my_error(ER_TABLE_DEF_CHANGED, MYF(0));
        }
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        if (error == DB_LOCK_NOTGRANTED) {
            error = HA_ERR_LOCK_WAIT_TIMEOUT;
            my_error(ER_LOCK_WAIT_TIMEOUT, MYF(0));
        }
4403
        table->status = STATUS_NOT_FOUND;
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4404
        last_cursor_error = error;
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4405
        cursor = NULL;             // Safety
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        goto exit;
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4407
    }
4408
    bzero((void *) &last_key, sizeof(last_key));
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    if (thd_sql_command(thd) == SQLCOM_SELECT) {
        set_query_columns(keynr);
        unpack_entire_row = false;
    }
    else {
        unpack_entire_row = true;
    }
4417 4418
    invalidate_bulk_fetch();
    doing_bulk_fetch = false;
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4419 4420
    error = 0;
exit:
4421
    TOKUDB_DBUG_RETURN(error);
4422 4423
}

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//
// closes the local cursor
//
4427
int ha_tokudb::index_end() {
4428
    TOKUDB_DBUG_ENTER("ha_tokudb::index_end %p", this);
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4429
    range_lock_grabbed = false;
4430 4431
    if (cursor) {
        DBUG_PRINT("enter", ("table: '%s'", table_share->table_name.str));
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        int r = cursor->c_close(cursor);
        assert(r==0);
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4434
        cursor = NULL;
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4435
        last_cursor_error = 0;
4436
    }
4437
    active_index = MAX_KEY;
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    //
    // reset query variables
    //
    unpack_entire_row = true;
    read_blobs = true;
    read_key = true;
    num_fixed_cols_for_query = 0;
    num_var_cols_for_query = 0;
4447 4448 4449 4450

    invalidate_bulk_fetch();
    doing_bulk_fetch = false;

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4451
    TOKUDB_DBUG_RETURN(0);
4452 4453
}

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int ha_tokudb::handle_cursor_error(int error, int err_to_return, uint keynr) {
    TOKUDB_DBUG_ENTER("ha_tokudb::handle_cursor_error");
4457
    if (error) {
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        if (error == DB_LOCK_NOTGRANTED) {
            error = HA_ERR_LOCK_WAIT_TIMEOUT;
        }
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4461
        last_cursor_error = error;
4462
        table->status = STATUS_NOT_FOUND;
4463 4464
        int r = cursor->c_close(cursor);
        assert(r==0);
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4465
        cursor = NULL;
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        if (error == DB_NOTFOUND) {
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            error = err_to_return;
4468
            if ((share->key_file[keynr]->cursor(share->key_file[keynr], transaction, &cursor, cursor_flags))) {
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                cursor = NULL;             // Safety
            }
        }
4472
    }
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    TOKUDB_DBUG_RETURN(error);
}


//
// Helper function for read_row and smart_dbt_callback_xxx functions
// When using a hidden primary key, upon reading a row, 
// we set the current_ident field to whatever the primary key we retrieved
// was
//
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void ha_tokudb::extract_hidden_primary_key(uint keynr, DBT const *found_key) {
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    //
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    // extract hidden primary key to current_ident
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    //
    if (hidden_primary_key) {
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        if (keynr == primary_key) {
            memcpy_fixed(current_ident, (char *) found_key->data, TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH);
        }
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        //
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        // if secondary key, hidden primary key is at end of found_key
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        //
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        else {
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            memcpy_fixed(
                current_ident, 
                (char *) found_key->data + found_key->size - TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH, 
                TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH
                );
        }
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    }
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}

4504

4505
int ha_tokudb::read_row_callback (uchar * buf, uint keynr, DBT const *row, DBT const *found_key) {
4506
    assert(keynr == primary_key);
4507
    return unpack_row(buf, row,found_key, keynr);
4508 4509
}

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//
// Reads the contents of row and found_key, DBT's retrieved from the DB associated to keynr, into buf
// This function assumes that we are using a covering index, as a result, if keynr is the primary key,
// we do not read row into buf
// Parameters:
//      [out]   buf - buffer for the row, in MySQL format
//              keynr - index into key_file that represents DB we are currently operating on.
//      [in]    row - the row that has been read from the preceding DB call
//      [in]    found_key - key used to retrieve the row
//
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4520
void ha_tokudb::read_key_only(uchar * buf, uint keynr, DBT const *found_key) {
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    TOKUDB_DBUG_ENTER("ha_tokudb::read_key_only");
    table->status = 0;
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    //
    // only case when we do not unpack the key is if we are dealing with the main dictionary
    // of a table with a hidden primary key
    //
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    if (!(hidden_primary_key && keynr == primary_key)) {
        unpack_key(buf, found_key, keynr);
    }
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    DBUG_VOID_RETURN;
}

//
// Helper function used to try to retrieve the entire row
// If keynr is associated with the main table, reads contents of found_key and row into buf, otherwise,
// makes copy of primary key and saves it to last_key. This can later be used to retrieve the entire row
// Parameters:
//      [out]   buf - buffer for the row, in MySQL format
//              keynr - index into key_file that represents DB we are currently operating on.
//      [in]    row - the row that has been read from the preceding DB call
//      [in]    found_key - key used to retrieve the row
//
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4543
int ha_tokudb::read_primary_key(uchar * buf, uint keynr, DBT const *row, DBT const *found_key) {
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4544
    TOKUDB_DBUG_ENTER("ha_tokudb::read_primary_key");
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4545
    int error = 0;
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4546
    table->status = 0;
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    //
    // case where we read from secondary table that is not clustered
    //
    if (keynr != primary_key && !(table->key_info[keynr].flags & HA_CLUSTERING)) {
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4551
        bool has_null;
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        //
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        // create a DBT that has the same data as row, this is inefficient
        // extract_hidden_primary_key MUST have been called before this
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        //
        bzero((void *) &last_key, sizeof(last_key));
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        if (!hidden_primary_key) {
            unpack_key(buf, found_key, keynr);
        }
        create_dbt_key_from_table(
            &last_key, 
            primary_key,
            key_buff,
            buf,
            &has_null
            );
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    }
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    //
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    // else read from clustered/primary key
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    //
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    else {
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        error = unpack_row(buf, row, found_key, keynr);
        if (error) { goto exit; }
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    }
    if (found_key) { DBUG_DUMP("read row key", (uchar *) found_key->data, found_key->size); }
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    error = 0;
exit:
    TOKUDB_DBUG_RETURN(error);
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}

//
// This function reads an entire row into buf. This function also assumes that
// the key needed to retrieve the row is stored in the member variable last_key
// Parameters:
//      [out]   buf - buffer for the row, in MySQL format
// Returns:
//      0 on success, error otherwise
//
int ha_tokudb::read_full_row(uchar * buf) {
    TOKUDB_DBUG_ENTER("ha_tokudb::read_full_row");
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    int error = 0;
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    struct smart_dbt_info info;
    info.ha = this;
    info.buf = buf;
    info.keynr = primary_key;
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    //
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    // assumes key is stored in this->last_key
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    //
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    error = share->file->getf_set(
        share->file, 
        transaction, 
        cursor_flags, 
        &last_key, 
        smart_dbt_callback_rowread_ptquery, 
        &info
        );

4609
    if (error) {
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        if (error == DB_LOCK_NOTGRANTED) {
            error = HA_ERR_LOCK_WAIT_TIMEOUT;
        }
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        table->status = STATUS_NOT_FOUND;
        TOKUDB_DBUG_RETURN(error == DB_NOTFOUND ? HA_ERR_CRASHED : error);
    }

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    TOKUDB_DBUG_RETURN(error);
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}


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// 
// Reads the next row matching to the key, on success, advances cursor 
// Parameters: 
//      [out]   buf - buffer for the next row, in MySQL format 
//      [in]     key - key value 
//                keylen - length of key 
// Returns: 
//      0 on success 
//      HA_ERR_END_OF_FILE if not found 
//      error otherwise 
// 
int ha_tokudb::index_next_same(uchar * buf, const uchar * key, uint keylen) { 
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    TOKUDB_DBUG_ENTER("ha_tokudb::index_next_same");
    statistic_increment(table->in_use->status_var.ha_read_next_count, &LOCK_status);

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    DBT curr_key;
    DBT found_key;
    bool has_null;
    int cmp;
4640
    int error = get_next(buf, 1);
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    if (error) {
        goto cleanup;
    }
    //
    // now do the comparison
    //
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    pack_key(&curr_key, active_index, key_buff2, key, keylen, COL_ZERO);
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    create_dbt_key_from_table(&found_key,active_index,key_buff3,buf,&has_null);
    cmp = tokudb_prefix_cmp_dbt_key(share->key_file[active_index], &curr_key, &found_key);
    if (cmp) {
        error = HA_ERR_END_OF_FILE; 
    }
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cleanup: 
    TOKUDB_DBUG_RETURN(error);
} 
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//
// According to InnoDB handlerton: Positions an index cursor to the index 
// specified in keynr. Fetches the row if any
// Parameters:
//      [out]       buf - buffer for the  returned row
//      [in]         key - key value, according to InnoDB, if NULL, 
//                              position cursor at start or end of index,
//                              not sure if this is done now
//                    key_len - length of key
//                    find_flag - according to InnoDB, search flags from my_base.h
// Returns:
//      0 on success
//      HA_ERR_KEY_NOT_FOUND if not found (per InnoDB), 
//          we seem to return HA_ERR_END_OF_FILE if find_flag != HA_READ_KEY_EXACT
//          TODO: investigate this for correctness
//      error otherwise
//
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int ha_tokudb::index_read(uchar * buf, const uchar * key, uint key_len, enum ha_rkey_function find_flag) {
    TOKUDB_DBUG_ENTER("ha_tokudb::index_read %p find %d", this, find_flag);
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    invalidate_bulk_fetch();
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    // TOKUDB_DBUG_DUMP("key=", key, key_len);
4680
    DBT row;
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    DBT lookup_key;
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    int error = 0;    
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    u_int32_t flags = 0;
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    THD* thd = ha_thd();
    tokudb_trx_data* trx = (tokudb_trx_data *) thd_data_get(thd, tokudb_hton->slot);;
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    struct smart_dbt_info info;
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    struct index_read_info ir_info;
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    HANDLE_INVALID_CURSOR();
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    table->in_use->status_var.ha_read_key_count++;
    bzero((void *) &row, sizeof(row));

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    info.ha = this;
    info.buf = buf;
    info.keynr = active_index;

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    ir_info.smart_dbt_info = info;
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    ir_info.cmp = 0;
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    flags = SET_PRELOCK_FLAG(0);
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    switch (find_flag) {
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    case HA_READ_KEY_EXACT: /* Find first record else error */
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        pack_key(&lookup_key, active_index, key_buff3, key, key_len, COL_NEG_INF);
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        ir_info.orig_key = &lookup_key;
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        error = cursor->c_getf_set_range(cursor, flags,
                &lookup_key, SMART_DBT_IR_CALLBACK, &ir_info);
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        if (ir_info.cmp) {
            error = DB_NOTFOUND;
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        }
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        break;
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    case HA_READ_AFTER_KEY: /* Find next rec. after key-record */
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        pack_key(&lookup_key, active_index, key_buff3, key, key_len, COL_POS_INF);
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        error = cursor->c_getf_set_range(cursor, flags,
                &lookup_key, SMART_DBT_CALLBACK, &info);
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        break;
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    case HA_READ_BEFORE_KEY: /* Find next rec. before key-record */
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        pack_key(&lookup_key, active_index, key_buff3, key, key_len, COL_NEG_INF);
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        error = cursor->c_getf_set_range_reverse(cursor, flags, 
                &lookup_key, SMART_DBT_CALLBACK, &info);
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        break;
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    case HA_READ_KEY_OR_NEXT: /* Record or next record */
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        pack_key(&lookup_key, active_index, key_buff3, key, key_len, COL_NEG_INF);
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        error = cursor->c_getf_set_range(cursor, flags,
                &lookup_key, SMART_DBT_CALLBACK, &info);
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        break;
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    //
    // This case does not seem to ever be used, it is ok for it to be slow
    //
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    case HA_READ_KEY_OR_PREV: /* Record or previous */
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        pack_key(&lookup_key, active_index, key_buff3, key, key_len, COL_NEG_INF);
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        ir_info.orig_key = &lookup_key;
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        error = cursor->c_getf_set_range(cursor, flags,
                &lookup_key, SMART_DBT_IR_CALLBACK, &ir_info);
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        if (error == DB_NOTFOUND) {
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            error = cursor->c_getf_last(cursor, flags, SMART_DBT_CALLBACK, &info);
        }
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        else if (ir_info.cmp) {
            error = cursor->c_getf_prev(cursor, flags, SMART_DBT_CALLBACK, &info);
        }
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        break;
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    case HA_READ_PREFIX_LAST_OR_PREV: /* Last or prev key with the same prefix */
4744
        pack_key(&lookup_key, active_index, key_buff3, key, key_len, COL_POS_INF);
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        error = cursor->c_getf_set_range_reverse(cursor, flags, 
                    &lookup_key, SMART_DBT_CALLBACK, &info);
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        break;
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    case HA_READ_PREFIX_LAST:
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        pack_key(&lookup_key, active_index, key_buff3, key, key_len, COL_POS_INF);
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        ir_info.orig_key = &lookup_key;
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        error = cursor->c_getf_set_range_reverse(cursor, flags, &lookup_key, SMART_DBT_IR_CALLBACK, &ir_info);
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        if (ir_info.cmp) {
            error = DB_NOTFOUND;
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        }
        break;
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    default:
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        TOKUDB_TRACE("unsupported:%d\n", find_flag);
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        error = HA_ERR_UNSUPPORTED;
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        break;
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    }
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    error = handle_cursor_error(error,HA_ERR_KEY_NOT_FOUND,active_index);
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    if (!error && !key_read && active_index != primary_key && !(table->key_info[active_index].flags & HA_CLUSTERING)) {
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        error = read_full_row(buf);
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    }
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    if (error && (tokudb_debug & TOKUDB_DEBUG_ERROR)) {
        TOKUDB_TRACE("error:%d:%d\n", error, find_flag);
    }
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    trx->stmt_progress.queried++;
    track_progress(thd);

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cleanup:
4773
    TOKUDB_DBUG_RETURN(error);
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}

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int ha_tokudb::read_data_from_range_query_buff(uchar* buf, bool need_val) {
    // buffer has the next row, get it from there
    int error;
    uchar* curr_pos = range_query_buff+curr_range_query_buff_offset;
    DBT curr_key;
    bzero((void *) &curr_key, sizeof(curr_key));
    
    // get key info
    u_int32_t key_size = *(u_int32_t *)curr_pos;
    curr_pos += sizeof(key_size);
    uchar* curr_key_buff = curr_pos;
    curr_pos += key_size;
    
    curr_key.data = curr_key_buff;
    curr_key.size = key_size;
    
    // if this is a covering index, this is all we need
    if (this->key_read) {
        assert(!need_val);
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        extract_hidden_primary_key(active_index, &curr_key);
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        read_key_only(buf, active_index, &curr_key);
        error = 0;
    }
    // we need to get more data
    else {
        DBT curr_val;
        bzero((void *) &curr_val, sizeof(curr_val));
        uchar* curr_val_buff = NULL;
        u_int32_t val_size = 0;
        // in this case, we don't have a val, we are simply extracting the pk
        if (!need_val) {
            curr_val.data = curr_val_buff;
            curr_val.size = val_size;
            extract_hidden_primary_key(active_index, &curr_key);
            error = read_primary_key( buf, active_index, &curr_val, &curr_key);
        }
        else {
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            extract_hidden_primary_key(active_index, &curr_key);
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            // need to extract a val and place it into buf
            if (unpack_entire_row) {
                // get val info
                val_size = *(u_int32_t *)curr_pos;
                curr_pos += sizeof(val_size);
                curr_val_buff = curr_pos;
                curr_pos += val_size;
                curr_val.data = curr_val_buff;
                curr_val.size = val_size;
                error = unpack_row(buf,&curr_val, &curr_key, active_index);
            }
            else {
                if (!(hidden_primary_key && active_index == primary_key)) {
                    unpack_key(buf,&curr_key,active_index);
                }
                // read rows we care about

                // first the null bytes;
                memcpy(buf, curr_pos, table_share->null_bytes);
                curr_pos += table_share->null_bytes;

                // now the fixed sized rows                
                for (u_int32_t i = 0; i < num_fixed_cols_for_query; i++) {
                    uint field_index = fixed_cols_for_query[i];
                    Field* field = table->field[field_index];
                    unpack_fixed_field(
                        buf + field_offset(field, table),
                        curr_pos,
                        share->kc_info.field_lengths[field_index]
                        );
                    curr_pos += share->kc_info.field_lengths[field_index];
                }
                // now the variable sized rows
                for (u_int32_t i = 0; i < num_var_cols_for_query; i++) {
                    uint field_index = var_cols_for_query[i];
                    Field* field = table->field[field_index];
                    u_int32_t field_len = *(u_int32_t *)curr_pos;
                    curr_pos += sizeof(field_len);
                    unpack_var_field(
                        buf + field_offset(field, table),
                        curr_pos,
                        field_len,
                        share->kc_info.length_bytes[field_index]
                        );
                    curr_pos += field_len;
                }
                // now the blobs
                if (read_blobs) {
                    u_int32_t blob_size = *(u_int32_t *)curr_pos;
                    curr_pos += sizeof(blob_size);
                    error = unpack_blobs(
                        buf,
                        curr_pos,
                        blob_size,
                        true
                        );
                    curr_pos += blob_size;
                    if (error) {
                        invalidate_bulk_fetch();
                        goto exit;
                    }
                }
                error = 0;
            }
        }
    }
    
    curr_range_query_buff_offset = curr_pos - range_query_buff;
exit:
    return error;
}
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static int
smart_dbt_bf_callback(DBT const *key, DBT  const *row, void *context) {
    SMART_DBT_BF_INFO info = (SMART_DBT_BF_INFO)context;
    return info->ha->fill_range_query_buf(info->need_val, key, row, info->direction, info->thd);
}

// fill in the range query buf for bulk fetch
int ha_tokudb::fill_range_query_buf(
    bool need_val, 
    DBT const *key, 
    DBT  const *row, 
    int direction,
    THD* thd
    ) {
    int error;
    //
    // first put the value into range_query_buf
    //
    u_int32_t size_remaining = size_range_query_buff - bytes_used_in_range_query_buff;
    u_int32_t size_needed;
    u_int32_t user_defined_size = get_tokudb_read_buf_size(thd);
    uchar* curr_pos = NULL;
    if (need_val) {
        if (unpack_entire_row) {
            size_needed = 2*sizeof(u_int32_t) + key->size + row->size;
        }
        else {
            // this is an upper bound
            size_needed = sizeof(u_int32_t) + // size of key length
                          key->size + row->size + //key and row
                          num_var_cols_for_query*(sizeof(u_int32_t)) + //lengths of varchars stored
                          sizeof(u_int32_t); //length of blobs
        }
    }
    else {
        size_needed = sizeof(u_int32_t) + key->size;
    }
    if (size_remaining < size_needed) {
        range_query_buff = (uchar *)my_realloc(
            (void *)range_query_buff, 
            bytes_used_in_range_query_buff+size_needed, 
            MYF(MY_WME)
            );
        if (range_query_buff == NULL) {
            error = ENOMEM;
4932
            invalidate_bulk_fetch();
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            goto cleanup;
        }
4935
        size_range_query_buff = bytes_used_in_range_query_buff+size_needed;
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    }
    //
    // now we know we have the size, let's fill the buffer, starting with the key
    //
    curr_pos = range_query_buff + bytes_used_in_range_query_buff;

    *(u_int32_t *)curr_pos = key->size;
    curr_pos += sizeof(u_int32_t);
    memcpy(curr_pos, key->data, key->size);
    curr_pos += key->size;
    if (need_val) {
        if (unpack_entire_row) {
            *(u_int32_t *)curr_pos = row->size;
            curr_pos += sizeof(u_int32_t);
            memcpy(curr_pos, row->data, row->size);
            curr_pos += row->size;
        }
        else {
            // need to unpack just the data we care about
            const uchar* fixed_field_ptr = (const uchar *) row->data;
            fixed_field_ptr += table_share->null_bytes;

            const uchar* var_field_offset_ptr = NULL;
            const uchar* var_field_data_ptr = NULL;
            
            var_field_offset_ptr = fixed_field_ptr + share->kc_info.mcp_info[active_index].fixed_field_size;
            var_field_data_ptr = var_field_offset_ptr + share->kc_info.mcp_info[active_index].len_of_offsets;

            // first the null bytes
            memcpy(curr_pos, row->data, table_share->null_bytes);
            curr_pos += table_share->null_bytes;
            // now the fixed fields
            //
            // first the fixed fields
            //
            for (u_int32_t i = 0; i < num_fixed_cols_for_query; i++) {
                uint field_index = fixed_cols_for_query[i];
                memcpy(
                    curr_pos, 
                    fixed_field_ptr + share->kc_info.cp_info[active_index][field_index].col_pack_val,
                    share->kc_info.field_lengths[field_index]
                    );
                curr_pos += share->kc_info.field_lengths[field_index];
            }
            
            //
            // now the var fields
            //
            for (u_int32_t i = 0; i < num_var_cols_for_query; i++) {
                uint field_index = var_cols_for_query[i];
                u_int32_t var_field_index = share->kc_info.cp_info[active_index][field_index].col_pack_val;
                u_int32_t data_start_offset;
                u_int32_t field_len;
                
                get_var_field_info(
                    &field_len, 
                    &data_start_offset, 
                    var_field_index, 
                    var_field_offset_ptr, 
                    share->kc_info.num_offset_bytes
                    );
                memcpy(curr_pos, &field_len, sizeof(field_len));
                curr_pos += sizeof(field_len);
                memcpy(curr_pos, var_field_data_ptr + data_start_offset, field_len);
                curr_pos += field_len;
            }
            
            if (read_blobs) {
                u_int32_t blob_offset = 0;
                u_int32_t data_size = 0;
                //
                // now the blobs
                //
                get_blob_field_info(
                    &blob_offset, 
                    share->kc_info.mcp_info[active_index].len_of_offsets,
                    var_field_data_ptr, 
                    share->kc_info.num_offset_bytes
                    );
5015
                data_size = row->size - blob_offset - (u_int32_t)(var_field_data_ptr - (const uchar *)row->data);
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                memcpy(curr_pos, &data_size, sizeof(data_size));
                curr_pos += sizeof(data_size);
                memcpy(curr_pos, var_field_data_ptr + blob_offset, data_size);
                curr_pos += data_size;
            }
        }
    }

    bytes_used_in_range_query_buff = curr_pos - range_query_buff;
    assert(bytes_used_in_range_query_buff <= size_range_query_buff);

    //
    // now determine if we should continue with the bulk fetch
    // we want to stop under these conditions:
    //  - we overran the prelocked range
    //  - we are close to the end of the buffer
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    //  - we have fetched an exponential amount of rows with
    //  respect to the bulk fetch iteration, which is initialized 
    //  to 0 in index_init() and prelock_range().

    rows_fetched_using_bulk_fetch++;
    // if the iteration is less than the number of possible shifts on
    // a 64 bit integer, check that we haven't exceeded this iterations
    // row fetch upper bound.
    if (bulk_fetch_iteration < HA_TOKU_BULK_FETCH_ITERATION_MAX) {
        uint64_t row_fetch_upper_bound = 1LLU << bulk_fetch_iteration;
        assert(row_fetch_upper_bound > 0);
        if (rows_fetched_using_bulk_fetch >= row_fetch_upper_bound) { 
            error = 0;
            goto cleanup;
        }
    }
5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063 5064 5065 5066 5067 5068 5069 5070 5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084 5085 5086 5087 5088 5089 5090 5091 5092 5093

    if (bytes_used_in_range_query_buff + table_share->rec_buff_length > user_defined_size) {
        error = 0;
        goto cleanup;
    }
    if (direction > 0) {
        // compare what we got to the right endpoint of prelocked range
        // because we are searching keys in ascending order
        if (prelocked_right_range_size == 0) {
            error = TOKUDB_CURSOR_CONTINUE;
            goto cleanup;
        }
        DBT right_range;
        bzero(&right_range, sizeof(right_range));
        right_range.size = prelocked_right_range_size;
        right_range.data = prelocked_right_range;
        int cmp = tokudb_cmp_dbt_key(
            share->key_file[active_index], 
            key, 
            &right_range
            );
        error = (cmp > 0) ? 0 : TOKUDB_CURSOR_CONTINUE;
    }
    else {
        // compare what we got to the left endpoint of prelocked range
        // because we are searching keys in descending order
        if (prelocked_left_range_size == 0) {
            error = TOKUDB_CURSOR_CONTINUE;
            goto cleanup;
        }
        DBT left_range;
        bzero(&left_range, sizeof(left_range));
        left_range.size = prelocked_left_range_size;
        left_range.data = prelocked_left_range;
        int cmp = tokudb_cmp_dbt_key(
            share->key_file[active_index], 
            key, 
            &left_range
            );
        error = (cmp < 0) ? 0 : TOKUDB_CURSOR_CONTINUE;
    }
cleanup:
    return error;
}

int ha_tokudb::get_next(uchar* buf, int direction) {
5094
    int error = 0; 
5095
    u_int32_t flags = SET_PRELOCK_FLAG(0);
5096 5097
    THD* thd = ha_thd();
    tokudb_trx_data* trx = (tokudb_trx_data *) thd_data_get(thd, tokudb_hton->slot);;
5098
    bool need_val;
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    HANDLE_INVALID_CURSOR();

5101 5102 5103 5104 5105 5106 5107
    // we need to read the val of what we retrieve if
    // we do NOT have a covering index AND we are using a clustering secondary
    // key
    need_val = (this->key_read == 0) && 
                (active_index == primary_key || 
                 table->key_info[active_index].flags & HA_CLUSTERING
                       );
5108

5109 5110
    if ((bytes_used_in_range_query_buff - curr_range_query_buff_offset) > 0) {
        error = read_data_from_range_query_buff(buf, need_val);
5111
    }
5112 5113 5114 5115 5116 5117 5118 5119 5120 5121 5122 5123
    else {
        invalidate_bulk_fetch();
        if (doing_bulk_fetch) {
            struct smart_dbt_bf_info bf_info;
            bf_info.ha = this;
            // you need the val if you have a clustering index and key_read is not 0;
            bf_info.direction = direction;
            bf_info.thd = ha_thd();
            bf_info.need_val = need_val;
            //
            // call c_getf_next with purpose of filling in range_query_buff
            //
5124
            rows_fetched_using_bulk_fetch = 0;
5125
            if (direction > 0) {
5126 5127 5128
                error = cursor->c_getf_next(cursor, flags, smart_dbt_bf_callback, &bf_info);
            } else {
                error = cursor->c_getf_prev(cursor, flags, smart_dbt_bf_callback, &bf_info);
5129
            }
5130 5131 5132
            if (bulk_fetch_iteration < HA_TOKU_BULK_FETCH_ITERATION_MAX) {
                bulk_fetch_iteration++;
            }
5133 5134 5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146

            error = handle_cursor_error(error, HA_ERR_END_OF_FILE,active_index);
            if (error) { goto cleanup; }
            
            //
            // now that range_query_buff is filled, read an element
            //
            error = read_data_from_range_query_buff(buf, need_val);
        }
        else {
            struct smart_dbt_info info;
            info.ha = this;
            info.buf = buf;
            info.keynr = active_index;
5147 5148 5149 5150 5151 5152 5153

            if (direction > 0) {
                error = cursor->c_getf_next(cursor, flags, SMART_DBT_CALLBACK, &info);
            } else {
                error = cursor->c_getf_prev(cursor, flags, SMART_DBT_CALLBACK, &info);
            }
            error = handle_cursor_error(error, HA_ERR_END_OF_FILE, active_index);
5154 5155 5156
        }
    }

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    //
5158 5159 5160 5161 5162 5163
    // at this point, one of two things has happened
    // either we have unpacked the data into buf, and we 
    // are done, or we have unpacked the primary key
    // into last_key, and we use the code below to
    // read the full row by doing a point query into the 
    // main table.
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5164
    //
5165
    
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5166
    if (!error && !key_read && (active_index != primary_key) && !(table->key_info[active_index].flags & HA_CLUSTERING) ) {
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5167 5168
        error = read_full_row(buf);
    }
5169 5170
    trx->stmt_progress.queried++;
    track_progress(thd);
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cleanup:
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    return error;
}


//
// Reads the next row from the active index (cursor) into buf, and advances cursor
// Parameters:
//      [out]   buf - buffer for the next row, in MySQL format
// Returns:
//      0 on success
//      HA_ERR_END_OF_FILE if not found
//      error otherwise
//
int ha_tokudb::index_next(uchar * buf) {
    TOKUDB_DBUG_ENTER("ha_tokudb::index_next");
    statistic_increment(table->in_use->status_var.ha_read_next_count, &LOCK_status);
    int error = get_next(buf, 1);
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5189
    TOKUDB_DBUG_RETURN(error);
5190 5191
}

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int ha_tokudb::index_read_last(uchar * buf, const uchar * key, uint key_len) {
    return(index_read(buf, key, key_len, HA_READ_PREFIX_LAST));    
}


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//
// Reads the previous row from the active index (cursor) into buf, and advances cursor
// Parameters:
//      [out]   buf - buffer for the next row, in MySQL format
// Returns:
//      0 on success
//      HA_ERR_END_OF_FILE if not found
//      error otherwise
//
5207
int ha_tokudb::index_prev(uchar * buf) {
5208
    TOKUDB_DBUG_ENTER("ha_tokudb::index_prev");
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5209
    statistic_increment(table->in_use->status_var.ha_read_next_count, &LOCK_status);
5210
    int error = get_next(buf, -1);
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5211
    TOKUDB_DBUG_RETURN(error);
5212 5213
}

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5214 5215 5216 5217 5218 5219 5220 5221 5222
//
// Reads the first row from the active index (cursor) into buf, and advances cursor
// Parameters:
//      [out]   buf - buffer for the next row, in MySQL format
// Returns:
//      0 on success
//      HA_ERR_END_OF_FILE if not found
//      error otherwise
//
5223
int ha_tokudb::index_first(uchar * buf) {
5224
    TOKUDB_DBUG_ENTER("ha_tokudb::index_first");
5225
    invalidate_bulk_fetch();
5226
    int error = 0;
5227
    struct smart_dbt_info info;
5228
    u_int32_t flags = SET_PRELOCK_FLAG(0);
5229 5230
    THD* thd = ha_thd();
    tokudb_trx_data* trx = (tokudb_trx_data *) thd_data_get(thd, tokudb_hton->slot);;
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5231
    HANDLE_INVALID_CURSOR();
5232

5233
    statistic_increment(table->in_use->status_var.ha_read_first_count, &LOCK_status);
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5234

5235 5236 5237 5238
    info.ha = this;
    info.buf = buf;
    info.keynr = active_index;

5239 5240
    error = cursor->c_getf_first(cursor, flags,
            SMART_DBT_CALLBACK, &info);
5241 5242
    error = handle_cursor_error(error,HA_ERR_END_OF_FILE,active_index);

5243 5244 5245 5246 5247 5248
    //
    // still need to get entire contents of the row if operation done on
    // secondary DB and it was NOT a covering index
    //
    if (!error && !key_read && (active_index != primary_key) && !(table->key_info[active_index].flags & HA_CLUSTERING) ) {
        error = read_full_row(buf);
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5249
    }
5250 5251 5252
    trx->stmt_progress.queried++;
    track_progress(thd);
    
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5253
cleanup:
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5254
    TOKUDB_DBUG_RETURN(error);
5255 5256
}

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//
// Reads the last row from the active index (cursor) into buf, and advances cursor
// Parameters:
//      [out]   buf - buffer for the next row, in MySQL format
// Returns:
//      0 on success
//      HA_ERR_END_OF_FILE if not found
//      error otherwise
//
5266
int ha_tokudb::index_last(uchar * buf) {
5267
    TOKUDB_DBUG_ENTER("ha_tokudb::index_last");
5268
    invalidate_bulk_fetch();
5269
    int error = 0;
5270
    struct smart_dbt_info info;
5271
    u_int32_t flags = SET_PRELOCK_FLAG(0);
5272 5273
    THD* thd = ha_thd();
    tokudb_trx_data* trx = (tokudb_trx_data *) thd_data_get(thd, tokudb_hton->slot);;
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5274
    HANDLE_INVALID_CURSOR();
5275

5276
    statistic_increment(table->in_use->status_var.ha_read_last_count, &LOCK_status);
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5277

5278 5279 5280 5281
    info.ha = this;
    info.buf = buf;
    info.keynr = active_index;

5282 5283
    error = cursor->c_getf_last(cursor, flags,
            SMART_DBT_CALLBACK, &info);
5284
    error = handle_cursor_error(error,HA_ERR_END_OF_FILE,active_index);
5285 5286 5287 5288 5289 5290
    //
    // still need to get entire contents of the row if operation done on
    // secondary DB and it was NOT a covering index
    //
    if (!error && !key_read && (active_index != primary_key) && !(table->key_info[active_index].flags & HA_CLUSTERING) ) {
        error = read_full_row(buf);
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5291
    }
5292 5293 5294 5295 5296

    if (trx) {
        trx->stmt_progress.queried++;
    }
    track_progress(thd);
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5297
cleanup:
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5298
    TOKUDB_DBUG_RETURN(error);
5299 5300
}

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5301 5302 5303 5304 5305 5306 5307 5308
//
// Initialize a scan of the table (which is why index_init is called on primary_key)
// Parameters:
//          scan - unused
// Returns:
//      0 on success
//      error otherwise
//
5309
int ha_tokudb::rnd_init(bool scan) {
5310
    TOKUDB_DBUG_ENTER("ha_tokudb::rnd_init");
5311
    int error = 0;
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5312
    range_lock_grabbed = false;
5313 5314 5315
    error = index_init(primary_key, 0);
    if (error) { goto cleanup;}

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5316
    if (scan) {
5317
        error = prelock_range(NULL, NULL);
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5318
        if (error) { goto cleanup; }
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5319
    }
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5320
    //
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5321
    // only want to set range_lock_grabbed to true after index_init
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5322 5323 5324 5325
    // successfully executed for two reasons:
    // 1) index_init will reset it to false anyway
    // 2) if it fails, we don't want prelocking on,
    //
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5326
    if (scan) { range_lock_grabbed = true; }
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5327
    error = 0;
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5328
cleanup:
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5329 5330 5331 5332
    if (error) { 
        index_end();
        last_cursor_error = error; 
    }
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5333
    TOKUDB_DBUG_RETURN(error);
5334 5335
}

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5336 5337 5338
//
// End a scan of the table
//
5339
int ha_tokudb::rnd_end() {
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5340
    TOKUDB_DBUG_ENTER("ha_tokudb::rnd_end");
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5341
    range_lock_grabbed = false;
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5342
    TOKUDB_DBUG_RETURN(index_end());
5343 5344
}

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5345

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5346 5347 5348 5349 5350 5351 5352 5353 5354
//
// Read the next row in a table scan
// Parameters:
//      [out]   buf - buffer for the next row, in MySQL format
// Returns:
//      0 on success
//      HA_ERR_END_OF_FILE if not found
//      error otherwise
//
5355
int ha_tokudb::rnd_next(uchar * buf) {
5356
    TOKUDB_DBUG_ENTER("ha_tokudb::ha_tokudb::rnd_next");
5357
    statistic_increment(table->in_use->status_var.ha_read_rnd_next_count, &LOCK_status);
5358
    int error = get_next(buf, 1);
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5359
    TOKUDB_DBUG_RETURN(error);
5360 5361 5362
}


5363 5364 5365
void ha_tokudb::track_progress(THD* thd) {
    tokudb_trx_data* trx = (tokudb_trx_data *) thd_data_get(thd, tokudb_hton->slot);
    if (trx) {
5366
        ulonglong num_written = trx->stmt_progress.inserted + trx->stmt_progress.updated + trx->stmt_progress.deleted;
5367
        bool update_status = 
5368
            (trx->stmt_progress.queried && tokudb_read_status_frequency && (trx->stmt_progress.queried % tokudb_read_status_frequency) == 0) ||
5369
            (num_written && tokudb_write_status_frequency && (num_written % tokudb_write_status_frequency) == 0);
5370
        if (update_status) {
5371 5372 5373 5374
            char *next_status = write_status_msg;
            bool first = true;
            int r;
            if (trx->stmt_progress.queried) {
5375 5376
                r = sprintf(next_status, "Queried about %llu row%s", trx->stmt_progress.queried, trx->stmt_progress.queried == 1 ? "" : "s"); 
                assert(r >= 0);
5377 5378 5379 5380
                next_status += r;
                first = false;
            }
            if (trx->stmt_progress.inserted) {
5381 5382 5383 5384 5385 5386
                if (trx->stmt_progress.using_loader) {
                    r = sprintf(next_status, "%sFetched about %llu row%s, loading data still remains", first ? "" : ", ", trx->stmt_progress.inserted, trx->stmt_progress.inserted == 1 ? "" : "s"); 
                }
                else {
                    r = sprintf(next_status, "%sInserted about %llu row%s", first ? "" : ", ", trx->stmt_progress.inserted, trx->stmt_progress.inserted == 1 ? "" : "s"); 
                }
5387
                assert(r >= 0);
5388 5389 5390 5391
                next_status += r;
                first = false;
            }
            if (trx->stmt_progress.updated) {
5392 5393
                r = sprintf(next_status, "%sUpdated about %llu row%s", first ? "" : ", ", trx->stmt_progress.updated, trx->stmt_progress.updated == 1 ? "" : "s"); 
                assert(r >= 0);
5394 5395 5396 5397
                next_status += r;
                first = false;
            }
            if (trx->stmt_progress.deleted) {
5398 5399
                r = sprintf(next_status, "%sDeleted about %llu row%s", first ? "" : ", ", trx->stmt_progress.deleted, trx->stmt_progress.deleted == 1 ? "" : "s"); 
                assert(r >= 0);
5400 5401 5402
                next_status += r;
                first = false;
            }
5403 5404
            if (!first)
	        thd_proc_info(thd, write_status_msg);
5405 5406 5407 5408 5409
        }
    }
}


5410
DBT *ha_tokudb::get_pos(DBT * to, uchar * pos) {
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5411
    TOKUDB_DBUG_ENTER("ha_tokudb::get_pos");
5412 5413
    /* We don't need to set app_data here */
    bzero((void *) to, sizeof(*to));
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5414 5415
    to->data = pos + sizeof(u_int32_t);
    to->size = *(u_int32_t *)pos;
5416
    DBUG_DUMP("key", (const uchar *) to->data, to->size);
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5417
    DBUG_RETURN(to);
5418 5419
}

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5420
//
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5421
// Retrieves a row with based on the primary key saved in pos
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5422 5423 5424 5425 5426
// Returns:
//      0 on success
//      HA_ERR_KEY_NOT_FOUND if not found
//      error otherwise
//
5427
int ha_tokudb::rnd_pos(uchar * buf, uchar * pos) {
5428
    TOKUDB_DBUG_ENTER("ha_tokudb::rnd_pos");
5429
    DBT db_pos;
5430
    int error = 0;
5431 5432 5433 5434 5435
    struct smart_dbt_info info;
    bool old_unpack_entire_row = unpack_entire_row;
    DBT* key = get_pos(&db_pos, pos); 

    unpack_entire_row = true;
5436 5437
    statistic_increment(table->in_use->status_var.ha_read_rnd_count, &LOCK_status);
    active_index = MAX_KEY;
5438 5439 5440 5441 5442

    info.ha = this;
    info.buf = buf;
    info.keynr = primary_key;

5443 5444 5445
    error = share->file->getf_set(share->file, transaction, 
            get_cursor_isolation_flags(lock.type, ha_thd()), 
            key, smart_dbt_callback_rowread_ptquery, &info);
5446

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5447
    if (error == DB_NOTFOUND) {
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5448 5449 5450 5451
        error = HA_ERR_KEY_NOT_FOUND;
        goto cleanup;
    }
cleanup:
5452
    unpack_entire_row = old_unpack_entire_row;
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5453
    TOKUDB_DBUG_RETURN(error);
5454 5455
}

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5456
int ha_tokudb::prelock_range( const key_range *start_key, const key_range *end_key) {
5457
    TOKUDB_DBUG_ENTER("ha_tokudb::prelock_range");
5458
    THD* thd = ha_thd(); 
5459 5460

    int error = 0;
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5461 5462
    DBT start_dbt_key;
    DBT end_dbt_key;
5463 5464
    uchar* start_key_buff  = prelocked_left_range;
    uchar* end_key_buff = prelocked_right_range;
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5465

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5466 5467 5468
    bzero((void *) &start_dbt_key, sizeof(start_dbt_key));
    bzero((void *) &end_dbt_key, sizeof(end_dbt_key));

5469
    HANDLE_INVALID_CURSOR();
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    if (start_key) {
        switch (start_key->flag) {
        case HA_READ_AFTER_KEY:
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5473
            pack_key(&start_dbt_key, active_index, start_key_buff, start_key->key, start_key->length, COL_POS_INF);
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5474 5475
            break;
        default:
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5476
            pack_key(&start_dbt_key, active_index, start_key_buff, start_key->key, start_key->length, COL_NEG_INF);
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            break;
        }
5479 5480 5481 5482
        prelocked_left_range_size = start_dbt_key.size;
    }
    else {
        prelocked_left_range_size = 0;
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5483
    }
5484

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    if (end_key) {
        switch (end_key->flag) {
        case HA_READ_BEFORE_KEY:
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5488
            pack_key(&end_dbt_key, active_index, end_key_buff, end_key->key, end_key->length, COL_NEG_INF);
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            break;
        default:
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5491
            pack_key(&end_dbt_key, active_index, end_key_buff, end_key->key, end_key->length, COL_POS_INF);
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            break;
5493
        }        
5494 5495 5496 5497
        prelocked_right_range_size = end_dbt_key.size;
    }
    else {
        prelocked_right_range_size = 0;
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    }

5500 5501 5502 5503 5504
    error = cursor->c_pre_acquire_range_lock(
        cursor, 
        start_key ? &start_dbt_key : share->key_file[active_index]->dbt_neg_infty(), 
        end_key ? &end_dbt_key : share->key_file[active_index]->dbt_pos_infty()
        );
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    if (error){ 
        last_cursor_error = error;
        //
        // cursor should be initialized here, but in case it is not, we still check
        //
        if (cursor) {
5511 5512
            int r = cursor->c_close(cursor);
            assert(r==0);
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            cursor = NULL;
        }
        goto cleanup; 
    }
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5518 5519 5520 5521 5522
    //
    // at this point, determine if we will be doing bulk fetch
    // as of now, only do it if we are doing a select
    //
    doing_bulk_fetch = (thd_sql_command(thd) == SQLCOM_SELECT);
5523 5524
    bulk_fetch_iteration = 0;
    rows_fetched_using_bulk_fetch = 0;
5525

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cleanup:
    TOKUDB_DBUG_RETURN(error);
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}
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5530 5531 5532 5533 5534 5535
//
// Prelock range if possible, start_key is leftmost, end_key is rightmost
// whether scanning forward or backward.  This function is called by MySQL
// for backward range queries (in QUICK_SELECT_DESC::get_next). 
// Forward scans use read_range_first()/read_range_next().
//
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5536
int ha_tokudb::prepare_range_scan( const key_range *start_key, const key_range *end_key) {
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    int error = prelock_range(start_key, end_key);
    if (!error) {
        range_lock_grabbed = true;
    }
    return error;
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}

int ha_tokudb::read_range_first(
    const key_range *start_key,
    const key_range *end_key,
    bool eq_range, 
    bool sorted) 
{
5550
    int error = prelock_range(start_key, end_key);
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    if (error) { goto cleanup; }
    range_lock_grabbed = true;
    
    error = handler::read_range_first(start_key, end_key, eq_range, sorted);
cleanup:
    return error;
}
5558

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int ha_tokudb::read_range_next()
{
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    TOKUDB_DBUG_ENTER("ha_tokudb::read_range_next");
    int error;
    error = handler::read_range_next();
    if (error) {
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5565
        range_lock_grabbed = false;
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    }
    TOKUDB_DBUG_RETURN(error);
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}



5572 5573 5574 5575 5576 5577 5578 5579 5580 5581 5582 5583 5584 5585 5586 5587 5588 5589 5590 5591 5592
/*
  Set a reference to the current record in (ref,ref_length).

  SYNOPSIS
  ha_tokudb::position()
  record                      The current record buffer

  DESCRIPTION
  The BDB handler stores the primary key in (ref,ref_length).
  There is either an explicit primary key, or an implicit (hidden)
  primary key.
  During open(), 'ref_length' is calculated as the maximum primary
  key length. When an actual key is shorter than that, the rest of
  the buffer must be cleared out. The row cannot be identified, if
  garbage follows behind the end of the key. There is no length
  field for the current key, so that the whole ref_length is used
  for comparison.

  RETURN
  nothing
*/
5593
void ha_tokudb::position(const uchar * record) {
5594
    TOKUDB_DBUG_ENTER("ha_tokudb::position");
5595 5596
    DBT key;
    if (hidden_primary_key) {
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        DBUG_ASSERT(ref_length == (TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH + sizeof(u_int32_t)));
        memcpy_fixed(ref + sizeof(u_int32_t), current_ident, TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH);
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5599
        *(u_int32_t *)ref = TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH;
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    } 
    else {
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        bool has_null;
        //
        // save the data
        //
        create_dbt_key_from_table(&key, primary_key, ref + sizeof(u_int32_t), record, &has_null);
        //
        // save the size of data in the first four bytes of ref
        //
        memcpy(ref, &key.size, sizeof(u_int32_t));
5611 5612 5613 5614
    }
    DBUG_VOID_RETURN;
}

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//
// Per InnoDB: Returns statistics information of the table to the MySQL interpreter,
// in various fields of the handle object. 
// Return:
//      0, always success
//
5621
int ha_tokudb::info(uint flag) {
5622
    TOKUDB_DBUG_ENTER("ha_tokudb::info %p %d %lld", this, flag, (long long) share->rows);
5623
    int error;
5624
    bool key_file_lock_taken = false;
5625 5626 5627
    DB_TXN* txn = NULL;
    uint curr_num_DBs = table->s->keys + test(hidden_primary_key);
    DB_BTREE_STAT64 dict_stats;
5628 5629
    if (flag & HA_STATUS_VARIABLE) {
        // Just to get optimizations right
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5630
        stats.records = share->rows + share->rows_from_locked_table;
5631 5632 5633
        if (stats.records == 0) {
            stats.records++;
        }
5634
        stats.deleted = 0;
5635
        if (!(flag & HA_STATUS_NO_LOCK)) {
5636
            u_int64_t num_rows = 0;
5637 5638
            TOKU_DB_FRAGMENTATION_S frag_info;
            memset(&frag_info, 0, sizeof frag_info);
5639

5640 5641 5642
            error = db_env->txn_begin(db_env, NULL, &txn, DB_READ_UNCOMMITTED);
            if (error) { goto cleanup; }

5643 5644 5645 5646 5647 5648
            // XXX 4530 lock the key file lock for reading
            share_key_file_rdlock(share);
            key_file_lock_taken = true;
            // we should always have a primary key
            assert(share->file != NULL);

5649 5650 5651 5652
            error = estimate_num_rows(share->file,&num_rows, txn);
            if (error == 0) {
                share->rows = num_rows;
                stats.records = num_rows;
5653 5654 5655
                if (stats.records == 0) {
                    stats.records++;
                }
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            }
            else {
                goto cleanup;
            }
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            error = share->file->get_fragmentation(
                share->file,
                &frag_info
                );
            if (error) { goto cleanup; }
            stats.delete_length = frag_info.unused_bytes;
5666

5667 5668 5669 5670 5671 5672
            error = share->file->stat64(
                share->file, 
                txn, 
                &dict_stats
                );
            if (error) { goto cleanup; }
5673
            
5674 5675
            stats.create_time = dict_stats.bt_create_time_sec;
            stats.update_time = dict_stats.bt_modify_time_sec;
5676
            stats.check_time = dict_stats.bt_verify_time_sec;
5677
            stats.data_file_length = dict_stats.bt_dsize;
5678 5679 5680 5681 5682 5683 5684 5685 5686 5687 5688 5689 5690 5691 5692 5693
            if (hidden_primary_key) {
                //
                // in this case, we have a hidden primary key, do not
                // want to report space taken up by the hidden primary key to the user
                //
                u_int64_t hpk_space = TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH*dict_stats.bt_ndata;
                stats.data_file_length = (hpk_space > stats.data_file_length) ? 0 : stats.data_file_length - hpk_space;
            }
            else {
                //
                // one infinity byte per key needs to be subtracted
                //
                u_int64_t inf_byte_space = dict_stats.bt_ndata;
                stats.data_file_length = (inf_byte_space > stats.data_file_length) ? 0 : stats.data_file_length - inf_byte_space;
            }

5694
            stats.mean_rec_length = stats.records ? (ulong)(stats.data_file_length/stats.records) : 0;
5695
            stats.index_file_length = 0;
5696 5697 5698 5699 5700 5701 5702 5703 5704 5705 5706
            // curr_num_DBs is the number of keys we have, according
            // to the mysql layer. if drop index is running concurrently
            // with info() (it can, because info does not take table locks),
            // then it could be the case that one of the dbs was dropped
            // and set to NULL before mysql was able to set table->s->keys
            // accordingly. 
            //
            // we should just ignore any DB * that is NULL. 
            //
            // this solution is much simpler than trying to maintain an 
            // accurate number of valid keys at the handlerton layer.
5707
            for (uint i = 0; i < curr_num_DBs; i++) {
5708 5709
                // skip the primary key, skip dropped indexes
                if (i == primary_key || share->key_file[i] == NULL) {
5710 5711 5712 5713 5714 5715 5716 5717 5718
                    continue;
                }
                error = share->key_file[i]->stat64(
                    share->key_file[i], 
                    txn, 
                    &dict_stats
                    );
                if (error) { goto cleanup; }
                stats.index_file_length += dict_stats.bt_dsize;
5719 5720 5721 5722 5723 5724 5725

                error = share->file->get_fragmentation(
                    share->file,
                    &frag_info
                    );
                if (error) { goto cleanup; }
                stats.delete_length += frag_info.unused_bytes;
5726 5727
            }
        }
5728
    }
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5729
    if ((flag & HA_STATUS_CONST)) {
5730
        stats.max_data_file_length=  9223372036854775807ULL;
5731
        for (uint i = 0; i < table_share->keys; i++) {
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5732
            table->key_info[i].rec_per_key[table->key_info[i].key_parts - 1] = 0;
5733 5734 5735
        }
    }
    /* Don't return key if we got an error for the internal primary key */
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5736
    if (flag & HA_STATUS_ERRKEY && last_dup_key < table_share->keys) {
5737
        errkey = last_dup_key;
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5738
    }    
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5739
    if (flag & HA_STATUS_AUTO && table->found_next_number_field) {        
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5740 5741
        THD *thd= table->in_use;
        struct system_variables *variables= &thd->variables;
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        stats.auto_increment_value = share->last_auto_increment + variables->auto_increment_increment;
    }
5744 5745
    error = 0;
cleanup:
5746 5747 5748 5749
    // XXX 4530 unlock the key file lock if it was taken
    if (key_file_lock_taken) {
        share_key_file_unlock(share);
    }
5750
    if (txn != NULL) {
5751
        commit_txn(txn, DB_TXN_NOSYNC);
5752 5753 5754
        txn = NULL;
    }
    TOKUDB_DBUG_RETURN(error);
5755 5756
}

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5757 5758 5759
//
//  Per InnoDB: Tells something additional to the handler about how to do things.
//
5760
int ha_tokudb::extra(enum ha_extra_function operation) {
5761
    TOKUDB_DBUG_ENTER("extra %p %d", this, operation);
5762 5763 5764 5765 5766 5767 5768 5769 5770 5771 5772 5773 5774 5775 5776 5777 5778 5779 5780
    switch (operation) {
    case HA_EXTRA_RESET_STATE:
        reset();
        break;
    case HA_EXTRA_KEYREAD:
        key_read = 1;           // Query satisfied with key
        break;
    case HA_EXTRA_NO_KEYREAD:
        key_read = 0;
        break;
    case HA_EXTRA_IGNORE_DUP_KEY:
        using_ignore = 1;
        break;
    case HA_EXTRA_NO_IGNORE_DUP_KEY:
        using_ignore = 0;
        break;
    default:
        break;
    }
5781
    TOKUDB_DBUG_RETURN(0);
5782 5783 5784
}

int ha_tokudb::reset(void) {
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5785
    TOKUDB_DBUG_ENTER("ha_tokudb::reset");
5786 5787
    key_read = 0;
    using_ignore = 0;
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5788
    TOKUDB_DBUG_RETURN(0);
5789 5790
}

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//
// helper function that iterates through all DB's 
// and grabs a lock (either read or write, but not both)
// Parameters:
//      [in]    trans - transaction to be used to pre acquire the lock
//              lt - type of lock to get, either lock_read or lock_write
//  Returns:
//      0 on success
//      error otherwise
//
int ha_tokudb::acquire_table_lock (DB_TXN* trans, TABLE_LOCK_TYPE lt) {
    int error = ENOSYS;
5804 5805
    rw_rdlock(&share->num_DBs_lock);
    uint curr_num_DBs = share->num_DBs;
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5806
    if (lt == lock_read) {
5807 5808
        error = 0;
        goto cleanup;
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5809 5810
    }
    else if (lt == lock_write) {
5811 5812
        if (tokudb_debug & TOKUDB_DEBUG_LOCK)
            TOKUDB_TRACE("%s\n", __FUNCTION__);
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        for (uint i = 0; i < curr_num_DBs; i++) {
            DB* db = share->key_file[i];
            error = db->pre_acquire_table_lock(db, trans);
5816 5817 5818
            if (error == EINVAL) 
                TOKUDB_TRACE("%s %d db=%p trans=%p\n", __FUNCTION__, i, db, trans);
            if (error) break;
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5819
        }
5820 5821 5822
        if (tokudb_debug & TOKUDB_DEBUG_LOCK)
            TOKUDB_TRACE("%s error=%d\n", __FUNCTION__, error);
        if (error) goto cleanup;
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5823 5824 5825 5826 5827 5828 5829 5830
    }
    else {
        error = ENOSYS;
        goto cleanup;
    }

    error = 0;
cleanup:
5831
    rw_unlock(&share->num_DBs_lock);
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5832 5833 5834 5835
    return error;
}


5836 5837 5838 5839
int ha_tokudb::create_txn(THD* thd, tokudb_trx_data* trx) {
    int error;
    ulong tx_isolation = thd_tx_isolation(thd);
    HA_TOKU_ISO_LEVEL toku_iso_level = tx_to_toku_iso(tx_isolation);
5840 5841
    bool is_autocommit = !thd_test_options(
            thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN);
5842 5843

    /* First table lock, start transaction */
5844
    if (thd_test_options(thd, OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN) && 
5845 5846 5847
         !trx->all &&
         (thd_sql_command(thd) != SQLCOM_CREATE_TABLE) &&
         (thd_sql_command(thd) != SQLCOM_DROP_TABLE) &&
5848 5849
         (thd_sql_command(thd) != SQLCOM_DROP_INDEX) &&
         (thd_sql_command(thd) != SQLCOM_CREATE_INDEX) &&
5850 5851
         (thd_sql_command(thd) != SQLCOM_ALTER_TABLE)) {
        /* QQQ We have to start a master transaction */
5852
        // DBUG_PRINT("trans", ("starting transaction all "));
5853 5854 5855 5856 5857
        if ((error = db_env->txn_begin(db_env, NULL, &trx->all, toku_iso_to_txn_flag(toku_iso_level)))) {
            trx->tokudb_lock_count--;      // We didn't get the lock
            goto cleanup;
        }
        if (tokudb_debug & TOKUDB_DEBUG_TXN) {
5858
            TOKUDB_TRACE("just created master:%p\n", trx->all);
5859 5860 5861 5862 5863 5864 5865 5866 5867 5868 5869
        }
        trx->sp_level = trx->all;
        trans_register_ha(thd, TRUE, tokudb_hton);
    }
    DBUG_PRINT("trans", ("starting transaction stmt"));
    if (trx->stmt) { 
        if (tokudb_debug & TOKUDB_DEBUG_TXN) {
            TOKUDB_TRACE("warning:stmt=%p\n", trx->stmt);
        }
    }
    u_int32_t txn_begin_flags;
5870
    if (trx->all == NULL) {
5871
        txn_begin_flags = toku_iso_to_txn_flag(toku_iso_level);
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5872
        if (txn_begin_flags == 0 && is_autocommit && thd_sql_command(thd) == SQLCOM_SELECT) {
5873 5874
            txn_begin_flags = DB_TXN_SNAPSHOT;
        }
5875 5876
    }
    else {
5877
        txn_begin_flags = DB_INHERIT_ISOLATION;
5878 5879 5880 5881 5882 5883
    }
    if ((error = db_env->txn_begin(db_env, trx->sp_level, &trx->stmt, txn_begin_flags))) {
        /* We leave the possible master transaction open */
        trx->tokudb_lock_count--;  // We didn't get the lock
        goto cleanup;
    }
5884
    trx->sub_sp_level = trx->stmt;
5885
    if (tokudb_debug & TOKUDB_DEBUG_TXN) {
5886
        TOKUDB_TRACE("just created stmt:%p:%p\n", trx->sp_level, trx->stmt);
5887
    }
5888
    reset_stmt_progress(&trx->stmt_progress);
5889 5890 5891 5892 5893
    trans_register_ha(thd, FALSE, tokudb_hton);
cleanup:
    return error;
}

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5894

5895 5896 5897 5898 5899 5900 5901 5902
/*
  As MySQL will execute an external lock for every new table it uses
  we can use this to start the transactions.
  If we are in auto_commit mode we just need to start a transaction
  for the statement to be able to rollback the statement.
  If not, we have to start a master transaction if there doesn't exist
  one from before.
*/
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//
// Parameters:
//      [in]    thd - handle to the user thread
//              lock_type - the type of lock
// Returns:
//      0 on success
//      error otherwise
//
5911
int ha_tokudb::external_lock(THD * thd, int lock_type) {
5912 5913 5914
    TOKUDB_DBUG_ENTER("ha_tokudb::external_lock cmd=%d %d", thd_sql_command(thd), lock_type);
    if (tokudb_debug & TOKUDB_DEBUG_LOCK)
        TOKUDB_TRACE("%s cmd=%d %d\n", __FUNCTION__, thd_sql_command(thd), lock_type);
5915

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    int error = 0;
    tokudb_trx_data *trx = NULL;
    trx = (tokudb_trx_data *) thd_data_get(thd, tokudb_hton->slot);
5919
    if (!trx) {
5920 5921
        error = create_tokudb_trx_data_instance(&trx);
        if (error) { goto cleanup; }
5922
        thd_data_set(thd, tokudb_hton->slot, trx);
5923
    }
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    if (trx->all == NULL) {
        trx->sp_level = NULL;
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    }
5927
    if (lock_type != F_UNLCK) {
5928
        is_fast_alter_running = false;
5929
        use_write_locks = false;
5930
        if (lock_type == F_WRLCK)
5931
            use_write_locks = true;
5932 5933
        if (!trx->tokudb_lock_count++) {
            DBUG_ASSERT(trx->stmt == 0);
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            transaction = NULL;    // Safety
5935 5936
            error = create_txn(thd, trx);
            if (error) {
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                goto cleanup;
5938 5939
            }
        }
5940 5941
        assert(thd->in_sub_stmt == 0);
        transaction = trx->sub_sp_level;
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    }
    else {
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        pthread_mutex_lock(&share->mutex);
        // hate dealing with comparison of signed vs unsigned, so doing this
        if (deleted_rows > added_rows && share->rows < (deleted_rows - added_rows)) {
            share->rows = 0;
        }
        else {
            share->rows += (added_rows - deleted_rows);
        }
        pthread_mutex_unlock(&share->mutex);
        added_rows = 0;
        deleted_rows = 0;
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5955
        share->rows_from_locked_table = 0;
5956 5957 5958 5959 5960 5961 5962 5963
        if (!--trx->tokudb_lock_count) {
            if (trx->stmt) {
                /*
                   F_UNLCK is done without a transaction commit / rollback.
                   This happens if the thread didn't update any rows
                   We must in this case commit the work to keep the row locks
                 */
                DBUG_PRINT("trans", ("commiting non-updating transaction"));
5964
                reset_stmt_progress(&trx->stmt_progress);
5965 5966 5967 5968 5969 5970 5971 5972
                if (!is_fast_alter_running) {
                    commit_txn(trx->stmt, 0);
                    if (tokudb_debug & TOKUDB_DEBUG_TXN) {
                        TOKUDB_TRACE("commit:%p:%d\n", trx->stmt, error);
                    }
                    trx->stmt = NULL;
                    trx->sub_sp_level = NULL;
                }
5973 5974
            }
        }
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        transaction = NULL;
5976
        is_fast_alter_running = false;
5977
    }
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cleanup:
5979 5980
    if (tokudb_debug & TOKUDB_DEBUG_LOCK)
        TOKUDB_TRACE("%s error=%d\n", __FUNCTION__, error);
5981
    TOKUDB_DBUG_RETURN(error);
5982 5983 5984 5985 5986 5987 5988 5989 5990
}


/*
  When using LOCK TABLE's external_lock is only called when the actual
  TABLE LOCK is done.
  Under LOCK TABLES, each used tables will force a call to start_stmt.
*/

5991
int ha_tokudb::start_stmt(THD * thd, thr_lock_type lock_type) {
5992
    TOKUDB_DBUG_ENTER("ha_tokudb::start_stmt cmd=%d %d", thd_sql_command(thd), lock_type);
5993
    int error = 0;
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5996
    tokudb_trx_data *trx = (tokudb_trx_data *) thd_data_get(thd, tokudb_hton->slot);
5997 5998 5999 6000 6001 6002 6003
    DBUG_ASSERT(trx);
    /*
       note that trx->stmt may have been already initialized as start_stmt()
       is called for *each table* not for each storage engine,
       and there could be many bdb tables referenced in the query
     */
    if (!trx->stmt) {
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        error = create_txn(thd, trx);
        if (error) {
            goto cleanup;
        }
6008
    }
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    else {
        if (tokudb_debug & TOKUDB_DEBUG_TXN) {
            TOKUDB_TRACE("trx->stmt already existed\n");
        }
    }
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    //
    // we know we are in lock tables
    // attempt to grab a table lock
    // if fail, continue, do not return error
    // This is because a failure ok, it simply means
    // another active transaction has some locks.
    // That other transaction modify this table
    // until it is unlocked, therefore having acquire_table_lock
    // potentially grab some locks but not all is ok.
    //
    if (lock.type <= TL_READ_NO_INSERT) {
6025
        acquire_table_lock(trx->sub_sp_level,lock_read);
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    }
    else {
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        if (!(thd_sql_command(thd) == SQLCOM_CREATE_INDEX ||
            thd_sql_command(thd) == SQLCOM_ALTER_TABLE ||
            thd_sql_command(thd) == SQLCOM_DROP_INDEX ||
            thd_sql_command(thd) == SQLCOM_TRUNCATE)) {
            acquire_table_lock(trx->sub_sp_level,lock_write);
        }
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    }    
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    if (added_rows > deleted_rows) {
        share->rows_from_locked_table = added_rows - deleted_rows;
    }
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    transaction = trx->sub_sp_level;
    trans_register_ha(thd, FALSE, tokudb_hton);
6040
cleanup:
6041
    TOKUDB_DBUG_RETURN(error);
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}

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u_int32_t ha_tokudb::get_cursor_isolation_flags(enum thr_lock_type lock_type, THD* thd) {
    uint sql_command = thd_sql_command(thd);
    bool in_lock_tables = thd_in_lock_tables(thd);

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    //
    // following InnoDB's lead and having checksum command use a snapshot read if told
    //
    if (sql_command == SQLCOM_CHECKSUM) {
        return 0;
    }
    else if ((lock_type == TL_READ && in_lock_tables) || 
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             (lock_type == TL_READ_HIGH_PRIORITY && in_lock_tables) || 
             sql_command != SQLCOM_SELECT ||
             (sql_command == SQLCOM_SELECT && lock_type >= TL_WRITE_ALLOW_WRITE)) { // select for update 
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        return DB_SERIALIZABLE;
    }
    else {
        return 0;
    }
}

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/*
  The idea with handler::store_lock() is the following:

  The statement decided which locks we should need for the table
  for updates/deletes/inserts we get WRITE locks, for SELECT... we get
  read locks.

  Before adding the lock into the table lock handler (see thr_lock.c)
  mysqld calls store lock with the requested locks.  Store lock can now
  modify a write lock to a read lock (or some other lock), ignore the
  lock (if we don't want to use MySQL table locks at all) or add locks
  for many tables (like we do when we are using a MERGE handler).

  Tokudb DB changes all WRITE locks to TL_WRITE_ALLOW_WRITE (which
  signals that we are doing WRITES, but we are still allowing other
  reader's and writer's.

  When releasing locks, store_lock() are also called. In this case one
  usually doesn't have to do anything.

  In some exceptional cases MySQL may send a request for a TL_IGNORE;
  This means that we are requesting the same lock as last time and this
  should also be ignored. (This may happen when someone does a flush
  table when we have opened a part of the tables, in which case mysqld
  closes and reopens the tables and tries to get the same locks at last
  time).  In the future we will probably try to remove this.
*/

6094
THR_LOCK_DATA **ha_tokudb::store_lock(THD * thd, THR_LOCK_DATA ** to, enum thr_lock_type lock_type) {
6095
    TOKUDB_DBUG_ENTER("ha_tokudb::store_lock, lock_type=%d cmd=%d", lock_type, thd_sql_command(thd));
6096
    if (tokudb_debug & TOKUDB_DEBUG_LOCK) {
6097
        TOKUDB_TRACE("%s lock_type=%d cmd=%d\n", __FUNCTION__, lock_type, thd_sql_command(thd));
6098
    }
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    if (lock_type != TL_IGNORE && lock.type == TL_UNLOCK) {
        // if creating a hot index
        if (get_create_index_online(thd) && thd_sql_command(thd)== SQLCOM_CREATE_INDEX) {
            rw_rdlock(&share->num_DBs_lock);
            if (share->num_DBs == (table->s->keys + test(hidden_primary_key))) {
                lock_type = TL_WRITE_ALLOW_WRITE;
            }
            lock.type = lock_type;
            rw_unlock(&share->num_DBs_lock);
6109
        } 
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#if MYSQL_VERSION_ID >= 50521
        // 5.5 supports reads concurrent with alter table.  just use the default lock type.
#else
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        else if (thd_sql_command(thd)== SQLCOM_CREATE_INDEX || 
                 thd_sql_command(thd)== SQLCOM_ALTER_TABLE ||
                 thd_sql_command(thd)== SQLCOM_DROP_INDEX) {
6116
            // force alter table to lock out other readers
6117
            lock_type = TL_WRITE;
6118
            lock.type = lock_type;
6119
        }
6120
#endif
6121
        else {
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            // If we are not doing a LOCK TABLE, then allow multiple writers
            if ((lock_type >= TL_WRITE_CONCURRENT_INSERT && lock_type <= TL_WRITE) && 
                !thd->in_lock_tables && thd_sql_command(thd) != SQLCOM_TRUNCATE && !thd_tablespace_op(thd)) {
                lock_type = TL_WRITE_ALLOW_WRITE;
            }
            lock.type = lock_type;
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        }
6129
    }
6130
    *to++ = &lock;
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    if (tokudb_debug & TOKUDB_DEBUG_LOCK)
        TOKUDB_TRACE("%s lock_type=%d\n", __FUNCTION__, lock_type);
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    DBUG_RETURN(to);
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}

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int toku_dbt_up(DB*,
                                 u_int32_t old_version, const DBT *old_descriptor, const DBT *old_key, const DBT *old_val,
                                 u_int32_t new_version, const DBT *new_descriptor, const DBT *new_key, const DBT *new_val) {
    assert(false);
    return 0;
}

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static inline enum row_type
compression_method_to_row_type(enum toku_compression_method method)
{
    switch (method) {
    case TOKU_NO_COMPRESSION:
        return ROW_TYPE_TOKU_UNCOMPRESSED;
    case TOKU_ZLIB_METHOD:
        return ROW_TYPE_TOKU_ZLIB;
    case TOKU_QUICKLZ_METHOD:
        return ROW_TYPE_TOKU_QUICKLZ;
    case TOKU_LZMA_METHOD:
        return ROW_TYPE_TOKU_LZMA;
    case TOKU_FAST_COMPRESSION_METHOD:
        return ROW_TYPE_TOKU_FAST;
    case TOKU_SMALL_COMPRESSION_METHOD:
        return ROW_TYPE_TOKU_SMALL;
    default:
        assert(false);
    }
}

enum row_type
ha_tokudb::get_row_type(void)
{
    enum toku_compression_method method;
    int r = share->file->get_compression_method(share->file, &method);
    assert(r == 0);
    return compression_method_to_row_type(method);
}

static inline enum toku_compression_method
row_type_to_compression_method(enum row_type type)
{
    switch (type) {
    case ROW_TYPE_TOKU_UNCOMPRESSED:
        return TOKU_NO_COMPRESSION;
    case ROW_TYPE_TOKU_ZLIB:
        return TOKU_ZLIB_METHOD;
    case ROW_TYPE_TOKU_QUICKLZ:
        return TOKU_QUICKLZ_METHOD;
    case ROW_TYPE_TOKU_LZMA:
        return TOKU_LZMA_METHOD;
    case ROW_TYPE_TOKU_FAST:
        return TOKU_FAST_COMPRESSION_METHOD;
    case ROW_TYPE_TOKU_SMALL:
        return TOKU_SMALL_COMPRESSION_METHOD;
    default:
        assert(false);
    }
}

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static int create_sub_table(
    const char *table_name, 
    DBT* row_descriptor, 
    DB_TXN* txn, 
    uint32_t block_size, 
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    uint32_t read_block_size,
    enum row_type row_type,
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    bool is_hot_index
    ) 
{
6204
    TOKUDB_DBUG_ENTER("create_sub_table");
6205
    int error;
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    DB *file = NULL;
6207
    u_int32_t create_flags;
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    error = db_create(&file, db_env, 0);
    if (error) {
        DBUG_PRINT("error", ("Got error: %d when creating table", error));
        my_errno = error;
        goto exit;
    }
        
6217

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    if (block_size != 0) {
        error = file->set_pagesize(file, block_size);
6220
        if (error != 0) {
6221
            DBUG_PRINT("error", ("Got error: %d when setting block size %u for table '%s'", error, block_size, table_name));
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            goto exit;
        }
    }
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    if (read_block_size != 0) {
        error = file->set_readpagesize(file, read_block_size);
        if (error != 0) {
            DBUG_PRINT("error", ("Got error: %d when setting read block size %u for table '%s'", error, read_block_size, table_name));
            goto exit;
        }
    }
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    create_flags = DB_THREAD | DB_CREATE | DB_EXCL | (is_hot_index ? DB_IS_HOT_INDEX : 0);    
    error = file->open(file, txn, table_name, NULL, DB_BTREE, create_flags, my_umask);
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    if (error) {
        DBUG_PRINT("error", ("Got error: %d when opening table '%s'", error, table_name));
        goto exit;
    } 
6239

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    {
        enum toku_compression_method method = row_type_to_compression_method(row_type);
        error = file->set_compression_method(file, method);
        if (error != 0) {
            DBUG_PRINT("error", ("Got error: %d when setting compression type %u for table '%s'", error, method, table_name));
            goto exit;
        }
    }

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    error = file->change_descriptor(file, txn, row_descriptor, (is_hot_index ? DB_IS_HOT_INDEX : 0));
    if (error) {
        DBUG_PRINT("error", ("Got error: %d when setting row descriptor for table '%s'", error, table_name));
        goto exit;
    }

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    error = 0;
exit:
6257
    if (file) {
6258 6259
        int r = file->close(file, 0);
        assert(r==0);
6260
    }
6261
    TOKUDB_DBUG_RETURN(error);
6262 6263
}

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void ha_tokudb::update_create_info(HA_CREATE_INFO* create_info) {
    if (share->has_auto_inc) {
        info(HA_STATUS_AUTO);
        create_info->auto_increment_value = stats.auto_increment_value;
    }
}

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//
6272 6273 6274 6275
// removes key name from status.tokudb.
// needed for when we are dropping indexes, so that 
// during drop table, we do not attempt to remove already dropped
// indexes because we did not keep status.tokudb in sync with list of indexes.
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//
6277
int ha_tokudb::remove_key_name_from_status(DB* status_block, char* key_name, DB_TXN* txn) {
6278
    int error;
6279 6280 6281 6282 6283 6284 6285 6286 6287 6288 6289 6290 6291 6292 6293 6294 6295 6296 6297
    uchar status_key_info[FN_REFLEN + sizeof(HA_METADATA_KEY)];
    HA_METADATA_KEY md_key = hatoku_key_name;
    memcpy(status_key_info, &md_key, sizeof(HA_METADATA_KEY));
    //
    // put index name in status.tokudb
    // 
    memcpy(
        status_key_info + sizeof(HA_METADATA_KEY), 
        key_name, 
        strlen(key_name) + 1
        );
    error = remove_metadata(
        status_block,
        status_key_info,
        sizeof(HA_METADATA_KEY) + strlen(key_name) + 1,
        txn
        );
    return error;
}
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6299 6300 6301 6302 6303 6304 6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6315 6316 6317 6318 6319 6320 6321 6322 6323 6324 6325
//
// writes the key name in status.tokudb, so that we may later delete or rename
// the dictionary associated with key_name
//
int ha_tokudb::write_key_name_to_status(DB* status_block, char* key_name, DB_TXN* txn) {
    int error;
    uchar status_key_info[FN_REFLEN + sizeof(HA_METADATA_KEY)];
    HA_METADATA_KEY md_key = hatoku_key_name;
    memcpy(status_key_info, &md_key, sizeof(HA_METADATA_KEY));
    //
    // put index name in status.tokudb
    // 
    memcpy(
        status_key_info + sizeof(HA_METADATA_KEY), 
        key_name, 
        strlen(key_name) + 1
        );
    error = write_metadata(
        status_block,
        status_key_info,
        sizeof(HA_METADATA_KEY) + strlen(key_name) + 1,
        NULL,
        0,
        txn
        );
    return error;
}
6326

6327 6328 6329 6330 6331
//
// some tracing moved out of ha_tokudb::create, because ::create was getting cluttered
//
void ha_tokudb::trace_create_table_info(const char *name, TABLE * form) {
    uint i;
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    //
    // tracing information about what type of table we are creating
    //
6335 6336 6337 6338 6339 6340 6341 6342 6343 6344 6345 6346 6347 6348 6349 6350 6351
    if (tokudb_debug & TOKUDB_DEBUG_OPEN) {
        for (i = 0; i < form->s->fields; i++) {
            Field *field = form->s->field[i];
            TOKUDB_TRACE("field:%d:%s:type=%d:flags=%x\n", i, field->field_name, field->type(), field->flags);
        }
        for (i = 0; i < form->s->keys; i++) {
            KEY *key = &form->s->key_info[i];
            TOKUDB_TRACE("key:%d:%s:%d\n", i, key->name, key->key_parts);
            uint p;
            for (p = 0; p < key->key_parts; p++) {
                KEY_PART_INFO *key_part = &key->key_part[p];
                Field *field = key_part->field;
                TOKUDB_TRACE("key:%d:%d:length=%d:%s:type=%d:flags=%x\n",
                             i, p, key_part->length, field->field_name, field->type(), field->flags);
            }
        }
    }
6352 6353
}

6354 6355 6356 6357 6358 6359 6360 6361 6362 6363 6364 6365 6366 6367 6368 6369 6370 6371 6372 6373 6374 6375 6376 6377 6378 6379 6380 6381 6382 6383 6384 6385 6386 6387 6388 6389 6390 6391 6392 6393 6394 6395 6396 6397 6398 6399 6400 6401 6402 6403 6404 6405 6406
u_int32_t get_max_desc_size(KEY_AND_COL_INFO* kc_info, TABLE* form) {
    u_int32_t max_row_desc_buff_size;
    max_row_desc_buff_size = 2*(form->s->fields * 6)+10; // upper bound of key comparison descriptor
    max_row_desc_buff_size += get_max_secondary_key_pack_desc_size(kc_info); // upper bound for sec. key part
    max_row_desc_buff_size += get_max_clustering_val_pack_desc_size(form->s); // upper bound for clustering val part
    return max_row_desc_buff_size;
}

u_int32_t create_secondary_key_descriptor(
    uchar* buf,
    KEY* key_info,
    KEY* prim_key,
    uint hpk,
    TABLE* form,
    uint primary_key,
    u_int32_t keynr,
    KEY_AND_COL_INFO* kc_info    
    ) 
{
    uchar* ptr = NULL;

    ptr = buf;
    ptr += create_toku_key_descriptor(
        ptr,
        false,
        key_info,
        hpk,
        prim_key
        );

    ptr += create_toku_secondary_key_pack_descriptor(
        ptr,
        hpk,
        primary_key,
        form->s,
        form,
        kc_info,
        key_info,
        prim_key
        );

    ptr += create_toku_clustering_val_pack_descriptor(
        ptr,
        primary_key,
        form->s,
        kc_info,
        keynr,
        key_info->flags & HA_CLUSTERING
        );
    return ptr - buf;
}


6407 6408 6409
//
// creates dictionary for secondary index, with key description key_info, all using txn
//
6410 6411 6412 6413 6414 6415 6416 6417 6418
int ha_tokudb::create_secondary_dictionary(
    const char* name, TABLE* form, 
    KEY* key_info, 
    DB_TXN* txn, 
    KEY_AND_COL_INFO* kc_info, 
    u_int32_t keynr,
    bool is_hot_index
    ) 
{
6419 6420 6421 6422 6423 6424
    int error;
    DBT row_descriptor;
    uchar* row_desc_buff = NULL;
    char* newname = NULL;
    KEY* prim_key = NULL;
    char dict_name[MAX_DICT_NAME_LEN];
6425
    u_int32_t max_row_desc_buff_size;
6426
    uint hpk= (form->s->primary_key >= MAX_KEY) ? TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH : 0;
6427
    uint32_t block_size;
6428 6429
    uint32_t read_block_size;
    THD* thd = ha_thd();
6430

6431
    bzero(&row_descriptor, sizeof(row_descriptor));
6432
    
6433
    max_row_desc_buff_size = get_max_desc_size(kc_info,form);
6434 6435

    row_desc_buff = (uchar *)my_malloc(max_row_desc_buff_size, MYF(MY_WME));
6436 6437 6438 6439 6440 6441 6442 6443 6444 6445 6446 6447 6448 6449
    if (row_desc_buff == NULL){ error = ENOMEM; goto cleanup;}

    newname = (char *)my_malloc(get_max_dict_name_path_length(name),MYF(MY_WME));
    if (newname == NULL){ error = ENOMEM; goto cleanup;}

    sprintf(dict_name, "key-%s", key_info->name);
    make_name(newname, name, dict_name);

    prim_key = (hpk) ? NULL : &form->s->key_info[primary_key];

    //
    // setup the row descriptor
    //
    row_descriptor.data = row_desc_buff;
6450 6451 6452
    //
    // save data necessary for key comparisons
    //
6453
    row_descriptor.size = create_secondary_key_descriptor(
6454 6455
        row_desc_buff,
        key_info,
6456
        prim_key,
6457
        hpk,
6458 6459 6460
        form,
        primary_key,
        keynr,
6461
        kc_info    
6462 6463 6464
        );
    assert(row_descriptor.size <= max_row_desc_buff_size);

6465 6466 6467 6468
    block_size = key_info->block_size << 10;
    if (block_size == 0) {
        block_size = get_tokudb_block_size(thd);
    }
6469
    read_block_size = get_tokudb_read_block_size(thd);
6470

6471
    error = create_sub_table(newname, &row_descriptor, txn, block_size, read_block_size, form->s->row_type, is_hot_index);
6472 6473 6474 6475 6476 6477
cleanup:    
    my_free(newname, MYF(MY_ALLOW_ZERO_PTR));
    my_free(row_desc_buff, MYF(MY_ALLOW_ZERO_PTR));
    return error;
}

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u_int32_t create_main_key_descriptor(
    uchar* buf,
    KEY* prim_key,
    uint hpk,
    uint primary_key,
    TABLE* form,
    KEY_AND_COL_INFO* kc_info
    ) 
{
    uchar* ptr = buf;
    ptr += create_toku_key_descriptor(
        ptr, 
        hpk,
        prim_key,
        false,
        NULL
        );
    
    ptr += create_toku_main_key_pack_descriptor(
        ptr
        );

    ptr += create_toku_clustering_val_pack_descriptor(
        ptr,
        primary_key,
        form->s,
        kc_info,
        primary_key,
        false
        );
    return ptr - buf;
}

6512 6513 6514 6515
//
// create and close the main dictionarr with name of "name" using table form, all within
// transaction txn.
//
6516
int ha_tokudb::create_main_dictionary(const char* name, TABLE* form, DB_TXN* txn, KEY_AND_COL_INFO* kc_info) {
6517 6518 6519 6520 6521
    int error;
    DBT row_descriptor;
    uchar* row_desc_buff = NULL;
    char* newname = NULL;
    KEY* prim_key = NULL;
6522
    u_int32_t max_row_desc_buff_size;
6523
    uint hpk= (form->s->primary_key >= MAX_KEY) ? TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH : 0;
6524
    uint32_t block_size;
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    uint32_t read_block_size;
    THD* thd = ha_thd();
6527 6528

    bzero(&row_descriptor, sizeof(row_descriptor));
6529
    max_row_desc_buff_size = get_max_desc_size(kc_info, form);
6530 6531

    row_desc_buff = (uchar *)my_malloc(max_row_desc_buff_size, MYF(MY_WME));
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    if (row_desc_buff == NULL){ error = ENOMEM; goto cleanup;}

    newname = (char *)my_malloc(get_max_dict_name_path_length(name),MYF(MY_WME));
    if (newname == NULL){ error = ENOMEM; goto cleanup;}
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6537
    make_name(newname, name, "main");
6538 6539

    prim_key = (hpk) ? NULL : &form->s->key_info[primary_key];
6540

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    //
    // setup the row descriptor
    //
    row_descriptor.data = row_desc_buff;
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    //
    // save data necessary for key comparisons
    //
6548 6549
    row_descriptor.size = create_main_key_descriptor(
        row_desc_buff,
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        prim_key,
6551
        hpk,
6552
        primary_key,
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        form,
        kc_info
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        );
    assert(row_descriptor.size <= max_row_desc_buff_size);
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6558 6559 6560 6561 6562 6563
    block_size = 0;
    if (prim_key)
        block_size = prim_key->block_size << 10;
    if (block_size == 0) {
        block_size = get_tokudb_block_size(thd);
    }
6564
    read_block_size = get_tokudb_read_block_size(thd);
6565

6566
    /* Create the main table that will hold the real rows */
6567
    error = create_sub_table(newname, &row_descriptor, txn, block_size, read_block_size, form->s->row_type, false);
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cleanup:    
    my_free(newname, MYF(MY_ALLOW_ZERO_PTR));
    my_free(row_desc_buff, MYF(MY_ALLOW_ZERO_PTR));
    return error;
}

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static inline enum row_type
row_format_to_row_type(srv_row_format_t row_format)
{
    switch (row_format) {
    case SRV_ROW_FORMAT_UNCOMPRESSED:
        return ROW_TYPE_TOKU_UNCOMPRESSED;
    case SRV_ROW_FORMAT_ZLIB:
        return ROW_TYPE_TOKU_ZLIB;
    case SRV_ROW_FORMAT_QUICKLZ:
        return ROW_TYPE_TOKU_QUICKLZ;
    case SRV_ROW_FORMAT_LZMA:
        return ROW_TYPE_TOKU_LZMA;
    case SRV_ROW_FORMAT_FAST:
        return ROW_TYPE_TOKU_FAST;
    case SRV_ROW_FORMAT_SMALL:
        return ROW_TYPE_TOKU_SMALL;
    default:
        assert(false);
    }
}

6595 6596 6597 6598 6599 6600 6601 6602 6603 6604 6605 6606 6607 6608 6609 6610 6611
//
// Creates a new table
// Parameters:
//      [in]    name - table name
//      [in]    form - info on table, columns and indexes
//      [in]    create_info - more info on table, CURRENTLY UNUSED
// Returns:
//      0 on success
//      error otherwise
//
int ha_tokudb::create(const char *name, TABLE * form, HA_CREATE_INFO * create_info) {
    TOKUDB_DBUG_ENTER("ha_tokudb::create");
    int error;
    DB *status_block = NULL;
    uint version;
    uint capabilities;
    DB_TXN* txn = NULL;
6612
    bool do_commit = false;
6613
    char* newname = NULL;
6614
    KEY_AND_COL_INFO kc_info;
6615
    tokudb_trx_data *trx = NULL;
6616
    THD* thd = ha_thd();
6617
    bool create_from_engine= (create_info->table_options & HA_OPTION_CREATE_FROM_ENGINE);
6618
    bzero(&kc_info, sizeof(kc_info));
6619

6620
    pthread_mutex_lock(&tokudb_meta_mutex);
6621

6622 6623
    trx = (tokudb_trx_data *) thd_data_get(ha_thd(), tokudb_hton->slot);

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    if (create_from_engine) {
        // table already exists, nothing to do
        error = 0;
        goto cleanup;
    }
6629 6630 6631 6632 6633 6634

    if (create_info->used_fields & HA_CREATE_USED_ROW_FORMAT) {
        form->s->row_type = create_info->row_type;
    } else {
        form->s->row_type = row_format_to_row_type(get_row_format(thd));
    }
6635

6636 6637
    newname = (char *)my_malloc(get_max_dict_name_path_length(name),MYF(MY_WME));
    if (newname == NULL){ error = ENOMEM; goto cleanup;}
6638

6639
    if (thd_sql_command(thd) == SQLCOM_CREATE_TABLE && trx && trx->sub_sp_level) {
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        txn = trx->sub_sp_level;
    }
    else {
        do_commit = true;
        error = db_env->txn_begin(db_env, 0, &txn, 0);
        if (error) { goto cleanup; }        
    }
    
6648 6649
    primary_key = form->s->primary_key;
    hidden_primary_key = (primary_key  >= MAX_KEY) ? TOKUDB_HIDDEN_PRIMARY_KEY_LENGTH : 0;
6650 6651 6652
    if (hidden_primary_key) {
        primary_key = form->s->keys;
    }
6653 6654 6655 6656

    /* do some tracing */
    trace_create_table_info(name,form);

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    /* Create status.tokudb and save relevant metadata */
6658
    make_name(newname, name, "status");
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6660 6661 6662
    error = db_create(&status_block, db_env, 0);
    if (error) { goto cleanup; }

6663
    error = status_block->open(status_block, txn, newname, NULL, DB_BTREE, DB_CREATE | DB_EXCL, 0);
6664
    if (error) { goto cleanup; }
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6666 6667 6668
    version = HA_TOKU_VERSION;
    capabilities = HA_TOKU_CAP;
    
6669
    error = write_to_status(status_block, hatoku_new_version,&version,sizeof(version), txn);
6670
    if (error) { goto cleanup; }
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6671

6672
    error = write_to_status(status_block, hatoku_capabilities,&capabilities,sizeof(capabilities), txn);
6673 6674
    if (error) { goto cleanup; }

6675
    error = write_auto_inc_create(status_block, create_info->auto_increment_value, txn);
6676
    if (error) { goto cleanup; }
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6678 6679 6680 6681 6682
    // only for tables that are not partitioned
    if (form->part_info == NULL) {
        error = write_frm_data(status_block, txn, form->s->path.str);
        if (error) { goto cleanup; }
    }
6683 6684 6685 6686 6687 6688 6689 6690 6691 6692 6693
    error = allocate_key_and_col_info(form->s, &kc_info);
    if (error) { goto cleanup; }

    error = initialize_key_and_col_info(
        form->s, 
        form,
        &kc_info,
        hidden_primary_key,
        primary_key
        );
    if (error) { goto cleanup; }
6694

6695
    error = create_main_dictionary(name, form, txn, &kc_info);
6696 6697 6698 6699
    if (error) {
        goto cleanup;
    }

6700 6701 6702

    for (uint i = 0; i < form->s->keys; i++) {
        if (i != primary_key) {
6703
            error = create_secondary_dictionary(name, form, &form->key_info[i], txn, &kc_info, i, false);
6704 6705 6706 6707 6708 6709 6710 6711 6712 6713 6714 6715
            if (error) {
                goto cleanup;
            }

            error = write_key_name_to_status(status_block, form->s->key_info[i].name, txn);
            if (error) { goto cleanup; }
        }
    }

    error = add_table_to_metadata(name, form, txn);
    if (error) { goto cleanup; }

6716
    error = 0;
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cleanup:
    if (status_block != NULL) {
6719 6720
        int r = status_block->close(status_block, 0);
        assert(r==0);
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6721
    }
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    free_key_and_col_info(&kc_info);
6723
    if (do_commit && txn) {
6724 6725 6726 6727 6728 6729
        if (error) {
            abort_txn(txn);
        }
        else {
            commit_txn(txn,0);
        }
6730
    }
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6731
    my_free(newname, MYF(MY_ALLOW_ZERO_PTR));
6732
    pthread_mutex_unlock(&tokudb_meta_mutex);
6733
    TOKUDB_DBUG_RETURN(error);
6734 6735
}

6736 6737 6738 6739 6740 6741 6742 6743 6744 6745 6746 6747 6748
int ha_tokudb::discard_or_import_tablespace(my_bool discard) {
    /*
    if (discard) {
        my_errno=HA_ERR_WRONG_COMMAND;
        return my_errno;
    }
    return add_table_to_metadata(share->table_name);
    */
    my_errno=HA_ERR_WRONG_COMMAND;
    return my_errno;
}


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//
6750 6751 6752 6753
// deletes from_name or renames from_name to to_name, all using transaction txn.
// is_delete specifies which we are doing
// is_key specifies if it is a secondary index (and hence a "key-" needs to be prepended) or
// if it is not a secondary index
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//
6755
int ha_tokudb::delete_or_rename_dictionary( const char* from_name, const char* to_name, const char* secondary_name, bool is_key, DB_TXN* txn, bool is_delete) {
6756 6757 6758 6759 6760 6761 6762 6763 6764 6765 6766 6767 6768 6769 6770 6771 6772 6773 6774 6775 6776 6777 6778 6779 6780 6781 6782 6783 6784 6785 6786 6787 6788 6789 6790 6791 6792 6793 6794 6795 6796 6797 6798 6799 6800 6801 6802 6803 6804 6805
    int error;
    char dict_name[MAX_DICT_NAME_LEN];
    char* new_from_name = NULL;
    char* new_to_name = NULL;
    assert(txn);
    
    new_from_name = (char *)my_malloc(
        get_max_dict_name_path_length(from_name), 
        MYF(MY_WME)
        );
    if (new_from_name == NULL) {
        error = ENOMEM;
        goto cleanup;
    }
    if (!is_delete) {
        assert(to_name);
        new_to_name = (char *)my_malloc(
            get_max_dict_name_path_length(to_name), 
            MYF(MY_WME)
            );
        if (new_to_name == NULL) {
            error = ENOMEM;
            goto cleanup;
        }
    }
    
    if (is_key) {
        sprintf(dict_name, "key-%s", secondary_name);
        make_name(new_from_name, from_name, dict_name);
    }
    else {
        make_name(new_from_name, from_name, secondary_name);
    }
    if (!is_delete) {
        if (is_key) {
            sprintf(dict_name, "key-%s", secondary_name);
            make_name(new_to_name, to_name, dict_name);
        }
        else {
            make_name(new_to_name, to_name, secondary_name);
        }
    }

    if (is_delete) {    
        error = db_env->dbremove(db_env, txn, new_from_name, NULL, 0);
    }
    else {
        error = db_env->dbrename(db_env, txn, new_from_name, NULL, new_to_name, 0);
    }
    if (error) { goto cleanup; }
6806

6807 6808 6809 6810 6811 6812 6813 6814 6815 6816 6817 6818
cleanup:
    my_free(new_from_name, MYF(MY_ALLOW_ZERO_PTR));
    my_free(new_to_name, MYF(MY_ALLOW_ZERO_PTR));
    return error;
}


//
// deletes or renames a table. if is_delete is true, then we delete, and to_name can be NULL
// if is_delete is false, then to_name must be non-NULL, as we are renaming the table.
//
int ha_tokudb::delete_or_rename_table (const char* from_name, const char* to_name, bool is_delete) {
6819
    int error;
6820
    DB* status_db = NULL;
6821 6822 6823 6824 6825 6826
    DBC* status_cursor = NULL;
    DB_TXN* txn = NULL;
    DBT curr_key;
    DBT curr_val;
    bzero(&curr_key, sizeof(curr_key));
    bzero(&curr_val, sizeof(curr_val));
6827
    pthread_mutex_lock(&tokudb_meta_mutex);
6828

6829 6830 6831
    error = db_env->txn_begin(db_env, 0, &txn, 0);
    if (error) { goto cleanup; }

6832
    //
6833
    // modify metadata db
6834
    //
6835 6836
    if (is_delete) {
        error = drop_table_from_metadata(from_name, txn);
6837
    }
6838 6839
    else {
        error = rename_table_in_metadata(from_name, to_name, txn);
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6840
    }
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    if (error) { goto cleanup; }

    //
    // open status db,
    // create cursor,
    // for each name read out of there, create a db and delete or rename it
    //
    error = open_status_dictionary(&status_db, from_name, txn);
    if (error) { goto cleanup; }

    error = status_db->cursor(status_db, txn, &status_cursor, 0);
    if (error) { goto cleanup; }

    while (error != DB_NOTFOUND) {
        error = status_cursor->c_get(
            status_cursor,
            &curr_key,
            &curr_val,
            DB_NEXT
            );
        if (error && error != DB_NOTFOUND) { goto cleanup; }
        if (error == DB_NOTFOUND) { break; }

        HA_METADATA_KEY mk = *(HA_METADATA_KEY *)curr_key.data;
        if (mk != hatoku_key_name) {
            continue;
        }
        error = delete_or_rename_dictionary(from_name, to_name, (char *)((char *)curr_key.data + sizeof(HA_METADATA_KEY)), true, txn, is_delete);
        if (error) { goto cleanup; }
    }

    //
    // delete or rename main.tokudb
    //
    error = delete_or_rename_dictionary(from_name, to_name, "main", false, txn, is_delete);
    if (error) { goto cleanup; }

    error = status_cursor->c_close(status_cursor);
6879
    assert(error==0);
6880
    status_cursor = NULL;
6881
    if (error) { goto cleanup; }
6882 6883

    error = status_db->close(status_db, 0);
6884
    assert(error == 0);
6885 6886 6887 6888 6889 6890 6891 6892
    status_db = NULL;
    
    //
    // delete or rename status.tokudb
    //
    error = delete_or_rename_dictionary(from_name, to_name, "status", false, txn, is_delete);
    if (error) { goto cleanup; }

6893
    my_errno = error;
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6894
cleanup:
6895
    if (status_cursor) {
6896 6897
        int r = status_cursor->c_close(status_cursor);
        assert(r==0);
6898 6899
    }
    if (status_db) {
6900 6901
        int r = status_db->close(status_db, 0);
        assert(r==0);
6902 6903 6904 6905 6906 6907 6908 6909
    }
    if (txn) {
        if (error) {
            abort_txn(txn);
        }
        else {
            commit_txn(txn, 0);
        }
6910
    }
6911
    pthread_mutex_unlock(&tokudb_meta_mutex);
6912 6913 6914 6915 6916 6917 6918 6919 6920 6921 6922 6923 6924 6925
    return error;
}


//
// Drops table
// Parameters:
//      [in]    name - name of table to be deleted
// Returns:
//      0 on success
//      error otherwise
//
int ha_tokudb::delete_table(const char *name) {
    TOKUDB_DBUG_ENTER("ha_tokudb::delete_table");
6926 6927
    int error;
    error = delete_or_rename_table(name, NULL, true);
6928
    if (error == DB_LOCK_NOTGRANTED && ((tokudb_debug & TOKUDB_DEBUG_HIDE_DDL_LOCK_ERRORS) == 0)) {
6929 6930 6931 6932 6933
        sql_print_error("Could not delete table %s because \
another transaction has accessed the table. \
To drop the table, make sure no transactions touch the table.", name);
    }
    TOKUDB_DBUG_RETURN(error);
6934 6935 6936
}


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//
// renames table from "from" to "to"
// Parameters:
//      [in]    name - old name of table
//      [in]    to - new name of table
// Returns:
//      0 on success
//      error otherwise
//
6946
int ha_tokudb::rename_table(const char *from, const char *to) {
6947
    TOKUDB_DBUG_ENTER("%s %s %s", __FUNCTION__, from, to);
6948
    int error;
6949
    error = delete_or_rename_table(from, to, false);
6950
    if (error == DB_LOCK_NOTGRANTED && ((tokudb_debug & TOKUDB_DEBUG_HIDE_DDL_LOCK_ERRORS) == 0)) {
6951 6952 6953 6954
        sql_print_error("Could not rename table from %s to %s because \
another transaction has accessed the table. \
To rename the table, make sure no transactions touch the table.", from, to);
    }
6955
    TOKUDB_DBUG_RETURN(error);
6956 6957 6958 6959
}


/*
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6960
  Returns estimate on number of seeks it will take to read through the table
6961 6962 6963
  This is to be comparable to the number returned by records_in_range so
  that we can decide if we should scan the table or use keys.
*/
6964
/// QQQ why divide by 3
6965
double ha_tokudb::scan_time() {
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    TOKUDB_DBUG_ENTER("ha_tokudb::scan_time");
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    double ret_val = (double)stats.records / 3;
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    DBUG_RETURN(ret_val);
6969 6970
}

6971 6972
double ha_tokudb::keyread_time(uint index, uint ranges, ha_rows rows)
{
6973
  if ((table->key_info[index].flags & HA_CLUSTERING) || (index == primary_key)) {
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    return read_time(index, ranges, rows);
  }
  /*
    It is assumed that we will read trough the whole key range and that all
    key blocks are half full (normally things are much better). It is also
    assumed that each time we read the next key from the index, the handler
    performs a random seek, thus the cost is proportional to the number of
    blocks read. This model does not take into account clustered indexes -
    engines that support that (e.g. InnoDB) may want to overwrite this method.
  */
  double keys_per_block= (stats.block_size/2.0/
                          (table->key_info[index].key_length +
                           ref_length) + 1);
  return (rows + keys_per_block - 1)/ keys_per_block;
}


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//
// Calculate the time it takes to read a set of ranges through an index
// This enables us to optimize reads for clustered indexes.
// Implementation pulled from InnoDB
// Parameters:
//          index - index to use
//          ranges - number of ranges
//          rows - estimated number of rows in the range
// Returns:
//      estimated time measured in disk seeks
//
double ha_tokudb::read_time(
7003 7004 7005 7006
    uint    index,
    uint    ranges,
    ha_rows rows
    )
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{
    double total_scan;
    double ret_val; 
7010
    bool is_primary = (index == primary_key);
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    bool is_clustering;
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    //
    // in case for hidden primary key, this is called
    //
    if (index >= table_share->keys) {
        ret_val = handler::read_time(index, ranges, rows);
        goto cleanup;
    }
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    is_clustering = (table->key_info[index].flags & HA_CLUSTERING);
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    //
    // if it is not the primary key, and it is not a clustering key, then return handler::read_time
    //
7027
    if (!(is_primary || is_clustering)) {
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        ret_val = handler::read_time(index, ranges, rows);
        goto cleanup;
    }

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    //
    // for primary key and for clustered keys, return a fraction of scan_time()
    //
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    total_scan = scan_time();

    if (stats.records < rows) {
7038
        ret_val = is_clustering ? total_scan + 0.00001 : total_scan;
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        goto cleanup;
    }

    //
    // one disk seek per range plus the proportional scan time of the rows
    //
    ret_val = (ranges + (double) rows / (double) stats.records * total_scan);
7046
    ret_val = is_clustering ? ret_val + 0.00001 : ret_val;
7047
    
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cleanup:
    return ret_val;
}


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//
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// Estimates the number of index records in a range. In case of errors, return
//   HA_TOKUDB_RANGE_COUNT instead of HA_POS_ERROR. This was behavior
//   when we got the handlerton from MySQL.
// Parameters:
//              keynr -index to use 
//      [in]    start_key - low end of the range
//      [in]    end_key - high end of the range
// Returns:
//      0 - There are no matching keys in the given range
//      number > 0 - There are approximately number matching rows in the range
//      HA_POS_ERROR - Something is wrong with the index tree
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//
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ha_rows ha_tokudb::records_in_range(uint keynr, key_range* start_key, key_range* end_key) {
7067
    TOKUDB_DBUG_ENTER("ha_tokudb::records_in_range");
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    DBT key;
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    ha_rows ret_val = HA_TOKUDB_RANGE_COUNT;
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    DB *kfile = share->key_file[keynr];
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    u_int64_t less, equal, greater;
7072
    u_int64_t total_rows_estimate = HA_TOKUDB_RANGE_COUNT;
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    u_int64_t start_rows, end_rows, rows;
    int is_exact;
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    int error;
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    uchar inf_byte;
7077

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    //
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7079
    // get start_rows and end_rows values so that we can estimate range
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    // when calling key_range64, the only value we can trust is the value for less
    // The reason is that the key being passed in may be a prefix of keys in the DB
    // As a result, equal may be 0 and greater may actually be equal+greater
    // So, we call key_range64 on the key, and the key that is after it.
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7084
    //
7085 7086 7087 7088 7089 7090
    if (!start_key && !end_key) {
        error = estimate_num_rows(kfile, &end_rows, transaction);
        if (error) {
            ret_val = HA_TOKUDB_RANGE_COUNT;
            goto cleanup;
        }
7091 7092
        ret_val = (end_rows <= 1) ? 1 : end_rows;
        goto cleanup;
7093
    }
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7094
    if (start_key) {
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        inf_byte = (start_key->flag == HA_READ_KEY_EXACT) ? 
            COL_NEG_INF : COL_POS_INF;
        pack_key(
            &key, 
            keynr, 
            key_buff, 
            start_key->key, 
            start_key->length, 
            inf_byte
            ); 
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7105
        error = kfile->key_range64(
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            kfile, 
            transaction, 
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7108
            &key,
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            &less,
            &equal,
            &greater,
            &is_exact
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7113 7114 7115 7116 7117
            );
        if (error) {
            ret_val = HA_TOKUDB_RANGE_COUNT;
            goto cleanup;
        }
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7118
        start_rows= less;
7119
        total_rows_estimate = less + equal + greater;
7120
    }
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7121
    else {
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7122
        start_rows= 0;
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    }

    if (end_key) {
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        inf_byte = (end_key->flag == HA_READ_BEFORE_KEY) ?
            COL_NEG_INF : COL_POS_INF;
        pack_key(
            &key, 
            keynr, 
            key_buff, 
            end_key->key, 
            end_key->length, 
            inf_byte
            );
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7136
        error = kfile->key_range64(
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7137 7138
            kfile, 
            transaction, 
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7139
            &key,
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7140 7141 7142 7143
            &less,
            &equal,
            &greater,
            &is_exact
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            );
        if (error) {
            ret_val = HA_TOKUDB_RANGE_COUNT;
            goto cleanup;
        }
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7149
        end_rows= less;
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    }
    else {
7152 7153 7154 7155 7156
        //
        // first if-clause ensures that start_key is non-NULL
        //
        assert(start_key);
        end_rows = total_rows_estimate;
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    }

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7159
    rows = (end_rows > start_rows) ? end_rows - start_rows : 1;
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7160

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7161
    //
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    // MySQL thinks a return value of 0 means there are exactly 0 rows
    // Therefore, always return non-zero so this assumption is not made
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7164
    //
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7165
    ret_val = (ha_rows) (rows <= 1 ? 1 : rows);
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cleanup:
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7167
    DBUG_RETURN(ret_val);
7168 7169
}

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7170 7171

//
7172 7173 7174
// Initializes the auto-increment data in the local "share" object to the
// greater of two values: what's stored in the metadata or the last inserted
// auto-increment field (if auto-increment field is the first field of a key).
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//
void ha_tokudb::init_auto_increment() {
    DBT key;
    DBT value;
    int error;
    HA_METADATA_KEY key_val = hatoku_max_ai;
    bzero(&key, sizeof(key));
    bzero(&value, sizeof(value));
    key.data = &key_val;
    key.size = sizeof(key_val);
7185
    value.flags = DB_DBT_USERMEM;
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    DB_TXN* txn = NULL;

    error = db_env->txn_begin(db_env, 0, &txn, 0);
    if (error) {
        share->last_auto_increment = 0;    
    }
    else {
        //
        // First retrieve hatoku_max_ai, which is max value used by auto increment
        // column so far, the max value could have been auto generated (e.g. insert (NULL))
        // or it could have been manually inserted by user (e.g. insert (345))
        //
7198 7199
        value.ulen = sizeof(share->last_auto_increment);
        value.data = &share->last_auto_increment;
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7200 7201 7202 7203 7204 7205 7206 7207
        error = share->status_block->get(
            share->status_block, 
            txn, 
            &key, 
            &value, 
            0
            );
        
7208
        if (error || value.size != sizeof(share->last_auto_increment)) {
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7209 7210
            share->last_auto_increment = 0;
        }
7211

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7212 7213 7214 7215 7216 7217
        //
        // Now retrieve the initial auto increment value, as specified by create table
        // so if a user does "create table t1 (a int auto_increment, primary key (a)) auto_increment=100",
        // then the value 100 should be stored here
        //
        key_val = hatoku_ai_create_value;
7218 7219
        value.ulen = sizeof(share->auto_inc_create_value);
        value.data = &share->auto_inc_create_value;
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7220 7221 7222 7223 7224 7225 7226 7227
        error = share->status_block->get(
            share->status_block, 
            txn, 
            &key, 
            &value, 
            0
            );
        
7228
        if (error || value.size != sizeof(share->auto_inc_create_value)) {
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7229 7230 7231
            share->auto_inc_create_value = 0;
        }

7232
        commit_txn(txn, 0);
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    }
    if (tokudb_debug & TOKUDB_DEBUG_AUTO_INCREMENT) {
        TOKUDB_TRACE("init auto increment:%lld\n", share->last_auto_increment);
    }
}

7239
void ha_tokudb::get_auto_increment(ulonglong offset, ulonglong increment, ulonglong nb_desired_values, ulonglong * first_value, ulonglong * nb_reserved_values) {
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7240
    TOKUDB_DBUG_ENTER("ha_tokudb::get_auto_increment");
7241 7242
    ulonglong nr;

7243
    pthread_mutex_lock(&share->mutex);
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7244 7245 7246 7247

    if (share->auto_inc_create_value > share->last_auto_increment) {
        nr = share->auto_inc_create_value;
        share->last_auto_increment = share->auto_inc_create_value;
7248
    }
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    else {
        nr = share->last_auto_increment + increment;
    }
    share->last_auto_increment = nr + (nb_desired_values - 1)*increment;
7253 7254
    if (delay_updating_ai_metadata) {
        ai_metadata_update_required = true;
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    }
    else {
        update_max_auto_inc(share->status_block, share->last_auto_increment);
    }
7259

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7260
    if (tokudb_debug & TOKUDB_DEBUG_AUTO_INCREMENT) {
7261 7262
        TOKUDB_TRACE("get_auto_increment(%lld,%lld,%lld):got:%lld:%lld\n",
                     offset, increment, nb_desired_values, nr, nb_desired_values);
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7263
    }
7264
    *first_value = nr;
7265
    *nb_reserved_values = nb_desired_values;
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7266
    pthread_mutex_unlock(&share->mutex);
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7267
    DBUG_VOID_RETURN;
7268 7269
}

7270 7271 7272 7273
bool ha_tokudb::is_optimize_blocking() {
    return false;
}

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bool ha_tokudb::is_auto_inc_singleton(){
    return false;
}

7278 7279
volatile int ha_tokudb_tokudb_add_index_wait = 0; // debug

7280 7281 7282 7283
//
// Internal function called by ha_tokudb::add_index and ha_tokudb::alter_table_phase2
// With a transaction, drops dictionaries associated with indexes in key_num
//
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//
// Adds indexes to the table. Takes the array of KEY passed in key_info, and creates
// DB's that will go at the end of share->key_file. THE IMPLICIT ASSUMPTION HERE is
// that the table will be modified and that these added keys will be appended to the end
// of the array table->key_info
// Parameters:
//      [in]    table_arg - table that is being modified, seems to be identical to this->table
//      [in]    key_info - array of KEY's to be added
//              num_of_keys - number of keys to be added, number of elements in key_info
//  Returns:
//      0 on success, error otherwise
//
7296 7297 7298 7299 7300 7301 7302 7303 7304 7305
int ha_tokudb::tokudb_add_index(
    TABLE *table_arg, 
    KEY *key_info, 
    uint num_of_keys, 
    DB_TXN* txn, 
    bool* inc_num_DBs,
    bool* modified_DBs
    ) 
{
    TOKUDB_DBUG_ENTER("ha_tokudb::tokudb_add_index");
7306 7307
    while (ha_tokudb_tokudb_add_index_wait) sleep(1); // debug

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7308 7309 7310 7311
    int error;
    uint curr_index = 0;
    DBC* tmp_cursor = NULL;
    int cursor_ret_val = 0;
7312
    DBT curr_pk_key, curr_pk_val;
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7313
    THD* thd = ha_thd(); 
7314
    DB_LOADER* loader = NULL;
7315
    DB_INDEXER* indexer = NULL;
7316
    bool loader_use_puts = get_load_save_space(thd);
7317
    bool use_hot_index = (lock.type == TL_WRITE_ALLOW_WRITE);
7318
    u_int32_t loader_flags = loader_use_puts ? LOADER_USE_PUTS : 0;
7319 7320
    u_int32_t indexer_flags = 0;
    u_int32_t mult_db_flags[MAX_KEY + 1] = {0};
7321 7322
    u_int32_t mult_put_flags[MAX_KEY + 1];
    u_int32_t mult_dbt_flags[MAX_KEY + 1];
7323
    bool creating_hot_index = false;
7324 7325
    struct loader_context lc;
    memset(&lc, 0, sizeof lc);
7326 7327 7328
    lc.thd = thd;
    lc.ha = this;
    loader_error = 0;
7329
    bool rw_lock_taken = false;
7330 7331
    *inc_num_DBs = false;
    *modified_DBs = false;
7332 7333
    invalidate_bulk_fetch();
    unpack_entire_row = true; // for bulk fetching rows
7334
    for (u_int32_t i = 0; i < MAX_KEY+1; i++) {
7335
        mult_put_flags[i] = 0;
7336 7337
        mult_dbt_flags[i] = DB_DBT_REALLOC;
    }
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7338 7339 7340 7341
    //
    // number of DB files we have open currently, before add_index is executed
    //
    uint curr_num_DBs = table_arg->s->keys + test(hidden_primary_key);
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7342

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7343 7344 7345 7346 7347 7348 7349
    //
    // status message to be shown in "show process list"
    //
    char status_msg[MAX_ALIAS_NAME + 200]; //buffer of 200 should be a good upper bound.
    ulonglong num_processed = 0; //variable that stores number of elements inserted thus far
    thd_proc_info(thd, "Adding indexes");

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7350 7351 7352 7353 7354
    
    //
    // in unpack_row, MySQL passes a buffer that is this long,
    // so this length should be good enough for us as well
    //
7355 7356
    bzero((void *) &curr_pk_key, sizeof(curr_pk_key));
    bzero((void *) &curr_pk_val, sizeof(curr_pk_val));
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    //
    // The files for secondary tables are derived from the name of keys
    // If we try to add a key with the same name as an already existing key,
    // We can crash. So here we check if any of the keys added has the same
    // name of an existing key, and if so, we fail gracefully
    //
    for (uint i = 0; i < num_of_keys; i++) {
        for (uint j = 0; j < table_arg->s->keys; j++) {
            if (strcmp(key_info[i].name, table_arg->s->key_info[j].name) == 0) {
                error = HA_ERR_WRONG_COMMAND;
                goto cleanup;
            }
        }
    }
    
7373 7374
    rw_wrlock(&share->num_DBs_lock);
    rw_lock_taken = true;
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7375 7376 7377 7378
    //
    // open all the DB files and set the appropriate variables in share
    // they go to the end of share->key_file
    //
7379
    creating_hot_index = use_hot_index && num_of_keys == 1 && (key_info[0].flags & HA_NOSAME) == 0;
7380 7381 7382 7383 7384 7385 7386
    if (use_hot_index && (share->num_DBs > curr_num_DBs)) {
        //
        // already have hot index in progress, get out
        //
        error = HA_ERR_INTERNAL_ERROR;
        goto cleanup;
    }
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7387
    curr_index = curr_num_DBs;
7388
    *modified_DBs = true;
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7389
    for (uint i = 0; i < num_of_keys; i++, curr_index++) {
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7390 7391
        if (key_info[i].flags & HA_CLUSTERING) {
            set_key_filter(
7392
                &share->kc_info.key_filters[curr_index],
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7393 7394 7395 7396 7397 7398
                &key_info[i],
                table_arg,
                false
                );                
            if (!hidden_primary_key) {
                set_key_filter(
7399
                    &share->kc_info.key_filters[curr_index],
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7400 7401 7402 7403 7404 7405
                    &table_arg->key_info[primary_key],
                    table_arg,
                    false
                    );
            }

7406
            error = initialize_col_pack_info(&share->kc_info,table_arg->s,curr_index);
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7407 7408 7409 7410 7411 7412
            if (error) {
                goto cleanup;
            }
        }


7413
        error = create_secondary_dictionary(share->table_name, table_arg, &key_info[i], txn, &share->kc_info, curr_index, creating_hot_index);
7414 7415
        if (error) { goto cleanup; }

7416
        error = open_secondary_dictionary(
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7417 7418 7419
            &share->key_file[curr_index], 
            &key_info[i],
            share->table_name,
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7420
            false,
7421
            txn
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7422 7423 7424 7425
            );
        if (error) { goto cleanup; }
    }
    
7426
    if (creating_hot_index) {
7427
        share->num_DBs++;
7428
        *inc_num_DBs = true;
7429 7430 7431 7432 7433 7434 7435 7436 7437 7438 7439
        error = db_env->create_indexer(
            db_env,
            txn,
            &indexer,
            share->file,
            num_of_keys,
            &share->key_file[curr_num_DBs],
            mult_db_flags,
            indexer_flags
            );
        if (error) { goto cleanup; }
7440

7441 7442
        error = indexer->set_poll_function(indexer, ai_poll_fun, &lc);
        if (error) { goto cleanup; }
7443

7444 7445
        error = indexer->set_error_callback(indexer, loader_ai_err_fun, &lc);
        if (error) { goto cleanup; }
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7446

7447 7448 7449 7450 7451
        rw_unlock(&share->num_DBs_lock);
        rw_lock_taken = false;
        
        error = indexer->build(indexer);
        if (error) { goto cleanup; }
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7452

7453 7454 7455
        error = indexer->close(indexer);
        if (error) { goto cleanup; }
        indexer = NULL;
7456
    }
7457 7458 7459
    else {
        rw_unlock(&share->num_DBs_lock);
        rw_lock_taken = false;
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7460 7461
        prelocked_right_range_size = 0;
        prelocked_left_range_size = 0;
7462 7463 7464 7465 7466 7467 7468
        struct smart_dbt_bf_info bf_info;
        bf_info.ha = this;
        // you need the val if you have a clustering index and key_read is not 0;
        bf_info.direction = 1;
        bf_info.thd = ha_thd();
        bf_info.need_val = TRUE;

7469 7470 7471 7472 7473 7474 7475 7476 7477 7478 7479 7480
        error = db_env->create_loader(
            db_env, 
            txn, 
            &loader, 
            NULL, // no src_db needed
            num_of_keys, 
            &share->key_file[curr_num_DBs], 
            mult_put_flags,
            mult_dbt_flags,
            loader_flags
            );
        if (error) { goto cleanup; }
7481

7482 7483
        error = loader->set_poll_function(loader, poll_fun, &lc);
        if (error) { goto cleanup; }
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7484

7485 7486 7487 7488 7489
        error = loader->set_error_callback(loader, loader_ai_err_fun, &lc);
        if (error) { goto cleanup; }
        //
        // scan primary table, create each secondary key, add to each DB
        //    
7490
        if ((error = share->file->cursor(share->file, txn, &tmp_cursor, DB_SERIALIZABLE))) {
7491
            tmp_cursor = NULL;             // Safety
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7492 7493
            goto cleanup;
        }
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7494

7495 7496 7497 7498 7499
        //
        // grab some locks to make this go faster
        // first a global read lock on the main DB, because
        // we intend to scan the entire thing
        //
7500 7501 7502 7503 7504
        error = tmp_cursor->c_pre_acquire_range_lock(
            tmp_cursor,
            share->file->dbt_neg_infty(),
            share->file->dbt_pos_infty()
            );
7505
        if (error) { goto cleanup; }
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7507 7508 7509 7510 7511
        // set the bulk fetch iteration to its max so that adding an
        // index fills the bulk fetch buffer every time. we do not
        // want it to grow exponentially fast.
        rows_fetched_using_bulk_fetch = 0;
        bulk_fetch_iteration = HA_TOKU_BULK_FETCH_ITERATION_MAX;
7512
        cursor_ret_val = tmp_cursor->c_getf_next(tmp_cursor, DB_PRELOCKED,smart_dbt_bf_callback, &bf_info);
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7514 7515
        while (cursor_ret_val != DB_NOTFOUND || ((bytes_used_in_range_query_buff - curr_range_query_buff_offset) > 0)) {
            if ((bytes_used_in_range_query_buff - curr_range_query_buff_offset) == 0) {
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7516
                invalidate_bulk_fetch(); // reset the buffers
7517 7518 7519 7520 7521
                cursor_ret_val = tmp_cursor->c_getf_next(tmp_cursor, DB_PRELOCKED, smart_dbt_bf_callback, &bf_info);
                if (cursor_ret_val != DB_NOTFOUND && cursor_ret_val != 0) {
                    error = cursor_ret_val;
                    goto cleanup;
                }
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            }
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            // do this check in case the the c_getf_next did not put anything into the buffer because
            // there was no more data
7525 7526 7527
            if ((bytes_used_in_range_query_buff - curr_range_query_buff_offset) == 0) {
                break;
            }
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7528
            // at this point, we know the range query buffer has at least one key/val pair
7529 7530 7531 7532 7533 7534 7535 7536 7537 7538 7539 7540 7541 7542 7543 7544 7545
            uchar* curr_pos = range_query_buff+curr_range_query_buff_offset;
            
            u_int32_t key_size = *(u_int32_t *)curr_pos;    
            curr_pos += sizeof(key_size);    
            uchar* curr_key_buff = curr_pos;    
            curr_pos += key_size;        
            curr_pk_key.data = curr_key_buff;    
            curr_pk_key.size = key_size;
            
            u_int32_t val_size = *(u_int32_t *)curr_pos;    
            curr_pos += sizeof(val_size);    
            uchar* curr_val_buff = curr_pos;    
            curr_pos += val_size;        
            curr_pk_val.data = curr_val_buff;    
            curr_pk_val.size = val_size;
            
            curr_range_query_buff_offset = curr_pos - range_query_buff;
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            error = loader->put(loader, &curr_pk_key, &curr_pk_val);
            if (error) { goto cleanup; }
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            num_processed++; 

            if ((num_processed % 1000) == 0) {
                if (loader_use_puts) {
                    sprintf(status_msg, "Adding indexes: Processed %llu of about %llu rows.", num_processed, (long long unsigned) share->rows);
                }
                else {
                    sprintf(status_msg, "Adding indexes: Fetched %llu of about %llu rows, loading of data still remains.", num_processed, (long long unsigned) share->rows);
                }
                thd_proc_info(thd, status_msg);
                if (thd->killed) {
                    error = ER_ABORTING_CONNECTION;
                    goto cleanup;
                }
            }
        }
        error = tmp_cursor->c_close(tmp_cursor);
        assert(error==0);
        tmp_cursor = NULL;

        error = loader->close(loader);
        loader = NULL;
        if (error) goto cleanup;
    }
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    curr_index = curr_num_DBs;
    for (uint i = 0; i < num_of_keys; i++, curr_index++) {
        if (key_info[i].flags & HA_NOSAME) {
            bool is_unique;
            error = is_index_unique(
                &is_unique, 
                txn, 
                share->key_file[curr_index], 
                &key_info[i]
                );
            if (error) goto cleanup;
            if (!is_unique) {
                error = HA_ERR_FOUND_DUPP_KEY;
                last_dup_key = i;
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                goto cleanup;
            }
        }
    }

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    //
    // We have an accurate row count, might as well update share->rows
    //
    pthread_mutex_lock(&share->mutex);
    share->rows = num_processed;
    pthread_mutex_unlock(&share->mutex);
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    //
    // now write stuff to status.tokudb
    //
    pthread_mutex_lock(&share->mutex);
    for (uint i = 0; i < num_of_keys; i++) {
        write_key_name_to_status(share->status_block, key_info[i].name, txn);
    }
    pthread_mutex_unlock(&share->mutex);
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    error = 0;
cleanup:
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    if (rw_lock_taken) {
        rw_unlock(&share->num_DBs_lock);
        rw_lock_taken = false;
    }
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    if (tmp_cursor) {            
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        int r = tmp_cursor->c_close(tmp_cursor);
        assert(r==0);
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        tmp_cursor = NULL;
    }
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    if (loader != NULL) {
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        sprintf(status_msg, "aborting creation of indexes.");
        thd_proc_info(thd, status_msg);
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        loader->abort(loader);
    }
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    if (indexer != NULL) {
        sprintf(status_msg, "aborting creation of indexes.");
        thd_proc_info(thd, status_msg);
        indexer->abort(indexer);
    }
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    if (error == DB_LOCK_NOTGRANTED && ((tokudb_debug & TOKUDB_DEBUG_HIDE_DDL_LOCK_ERRORS) == 0)) {
        sql_print_error("Could not add indexes to table %s because \
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another transaction has accessed the table. \
To add indexes, make sure no transactions touch the table.", share->table_name);
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    }
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    TOKUDB_DBUG_RETURN(error ? error : loader_error);
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}

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//
// Internal function called by ha_tokudb::add_index and ha_tokudb::alter_table_phase2
// Closes added indexes in case of error in error path of add_index and alter_table_phase2
//
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void ha_tokudb::restore_add_index(TABLE* table_arg, uint num_of_keys, bool incremented_numDBs, bool modified_DBs) {
    uint curr_num_DBs = table_arg->s->keys + test(hidden_primary_key);
    uint curr_index = 0;

    //
    // need to restore num_DBs, and we have to do it before we close the dictionaries
    // so that there is not a window 
    //
    if (incremented_numDBs) {
        rw_wrlock(&share->num_DBs_lock);
        share->num_DBs--;
    }
    if (modified_DBs) {
        curr_index = curr_num_DBs;
        for (uint i = 0; i < num_of_keys; i++, curr_index++) {
            reset_key_and_col_info(&share->kc_info, curr_index);
        }
        curr_index = curr_num_DBs;
        for (uint i = 0; i < num_of_keys; i++, curr_index++) {
            if (share->key_file[curr_index]) {
                int r = share->key_file[curr_index]->close(
                    share->key_file[curr_index],
                    0
                    );
                assert(r==0);
                share->key_file[curr_index] = NULL;
            }
        }
    }
    if (incremented_numDBs) {
        rw_unlock(&share->num_DBs_lock);
    }
}
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#if MYSQL_VERSION_ID >= 50521

class ha_tokudb_add_index : public handler_add_index
{
public:
    DB_TXN *txn;
    bool incremented_numDBs;
    bool modified_DBs;
	ha_tokudb_add_index(TABLE* table, KEY* key_info, uint num_of_keys, DB_TXN *txn, bool incremented_numDBs, bool modified_DBs) :
		handler_add_index(table, key_info, num_of_keys), txn(txn), incremented_numDBs(incremented_numDBs), modified_DBs(modified_DBs) {
    }
	~ha_tokudb_add_index() {
    }
};

volatile int ha_tokudb_add_index_wait = 0;

int ha_tokudb::add_index(TABLE *table_arg, KEY *key_info, uint num_of_keys, handler_add_index **add) {
    TOKUDB_DBUG_ENTER("ha_tokudb::add_index");
    while (ha_tokudb_add_index_wait) sleep(1); // debug

    DB_TXN* txn = NULL;
    int error;
    bool incremented_numDBs = false;
    bool modified_DBs = false;
    
    error = db_env->txn_begin(db_env, 0, &txn, 0);
    if (error) { goto cleanup; }

    error = tokudb_add_index(
        table_arg,
        key_info,
        num_of_keys,
        txn,
        &incremented_numDBs,
        &modified_DBs
        );
    if (error) { goto cleanup; }
    
cleanup:
    if (error) {
        if (txn) {
            restore_add_index(table_arg, num_of_keys, incremented_numDBs, modified_DBs);
            abort_txn(txn);
        }
    } else {
        *add = new ha_tokudb_add_index(table_arg, key_info, num_of_keys, txn, incremented_numDBs, modified_DBs);
    }
    TOKUDB_DBUG_RETURN(error);
}

volatile int ha_tokudb_final_add_index_wait = 0;

int ha_tokudb::final_add_index(handler_add_index *add_arg, bool commit) {
    TOKUDB_DBUG_ENTER("ha_tokudb::final_add_index");
    while (ha_tokudb_final_add_index_wait) sleep(1); // debug

    // extract the saved state variables
	ha_tokudb_add_index *add = static_cast<class ha_tokudb_add_index*>(add_arg);
    DB_TXN *txn = add->txn;
    bool incremented_numDBs = add->incremented_numDBs;
    bool modified_DBs = add->modified_DBs;
    TABLE *table = add->table;
    uint num_of_keys = add->num_of_keys;
    delete add;

    int error = 0;

    if (commit) {
        commit_txn(txn, 0);
    } else {
        restore_add_index(table, num_of_keys, incremented_numDBs, modified_DBs);
        abort_txn(txn);
    }
    TOKUDB_DBUG_RETURN(error);
}

#else

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int ha_tokudb::add_index(TABLE *table_arg, KEY *key_info, uint num_of_keys) {
    TOKUDB_DBUG_ENTER("ha_tokudb::add_index");
    DB_TXN* txn = NULL;
    int error;
    bool incremented_numDBs = false;
    bool modified_DBs = false;
    
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    error = db_env->txn_begin(db_env, 0, &txn, 0);
    if (error) { goto cleanup; }
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    error = tokudb_add_index(
        table_arg,
        key_info,
        num_of_keys,
        txn,
        &incremented_numDBs,
        &modified_DBs
        );
    if (error) { goto cleanup; }
    
cleanup:
    if (error) {
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        if (txn) {
            restore_add_index(table_arg, num_of_keys, incremented_numDBs, modified_DBs);
            abort_txn(txn);
        }
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    }
    else {
      commit_txn(txn, 0);
    }
    TOKUDB_DBUG_RETURN(error);
}

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#endif

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volatile int ha_tokudb_drop_indexes_wait = 0; // debug

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//
// Internal function called by ha_tokudb::prepare_drop_index and ha_tokudb::alter_table_phase2
// With a transaction, drops dictionaries associated with indexes in key_num
//
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int ha_tokudb::drop_indexes(TABLE *table_arg, uint *key_num, uint num_of_keys, DB_TXN* txn) {
    TOKUDB_DBUG_ENTER("ha_tokudb::drop_indexes");
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    while (ha_tokudb_drop_indexes_wait) sleep(1); // debug
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    // XXX 4530 lock the key file lock for writing.
    share_key_file_wrlock(share);

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    int error = 0;
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    for (uint i = 0; i < num_of_keys; i++) {
        uint curr_index = key_num[i];
        error = share->key_file[curr_index]->pre_acquire_fileops_lock(share->key_file[curr_index],txn);
        if (error != 0) {
            goto cleanup;
        }
    }
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    for (uint i = 0; i < num_of_keys; i++) {
        uint curr_index = key_num[i];
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        int r = share->key_file[curr_index]->close(share->key_file[curr_index],0);
        assert(r==0);
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        share->key_file[curr_index] = NULL;

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        error = remove_key_name_from_status(share->status_block, table_arg->key_info[curr_index].name, txn);
        if (error) { goto cleanup; }
        
        error = delete_or_rename_dictionary(share->table_name, NULL, table_arg->key_info[curr_index].name, true, txn, true);
        if (error) { goto cleanup; }
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    }
7823

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cleanup:
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    if (error == DB_LOCK_NOTGRANTED && ((tokudb_debug & TOKUDB_DEBUG_HIDE_DDL_LOCK_ERRORS) == 0)) {
        sql_print_error("Could not drop indexes from table %s because \
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another transaction has accessed the table. \
To drop indexes, make sure no transactions touch the table.", share->table_name);
7829
    }
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    // XXX 4530 unlock the key file lock
    share_key_file_unlock(share);
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    TOKUDB_DBUG_RETURN(error);
}

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//
// Internal function called by ha_tokudb::prepare_drop_index and ha_tokudb::alter_table_phase2
// Restores dropped indexes in case of error in error path of prepare_drop_index and alter_table_phase2
//
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void ha_tokudb::restore_drop_indexes(TABLE *table_arg, uint *key_num, uint num_of_keys) {
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    // XXX 4530 lock the key file lock for writing
    share_key_file_wrlock(share);

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    //
    // reopen closed dictionaries
    //
    for (uint i = 0; i < num_of_keys; i++) {
        int r;
        uint curr_index = key_num[i];
        if (share->key_file[curr_index] == NULL) {
            r = open_secondary_dictionary(
                &share->key_file[curr_index], 
                &table_share->key_info[curr_index],
                share->table_name,
                false, // 
                NULL
                );
            assert(!r);
        }
    }            
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    // XXX 4530 unlock the key file lock
    share_key_file_unlock(share);
7862
}
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volatile int ha_tokudb_prepare_drop_index_wait = 0; //debug

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//
// Prepares to drop indexes to the table. For each value, i, in the array key_num,
// table->key_info[i] is a key that is to be dropped.
//  ***********NOTE*******************
// Although prepare_drop_index is supposed to just get the DB's ready for removal,
// and not actually do the removal, we are doing it here and not in final_drop_index
// For the flags we expose in alter_table_flags, namely xxx_NO_WRITES, this is allowed
// Changes for "future-proofing" this so that it works when we have the equivalent flags
// that are not NO_WRITES are not worth it at the moments
// Parameters:
//      [in]    table_arg - table that is being modified, seems to be identical to this->table
//      [in]    key_num - array of indexes that specify which keys of the array table->key_info
//                  are to be dropped
//              num_of_keys - size of array, key_num
//  Returns:
//      0 on success, error otherwise
//
int ha_tokudb::prepare_drop_index(TABLE *table_arg, uint *key_num, uint num_of_keys) {
    TOKUDB_DBUG_ENTER("ha_tokudb::prepare_drop_index");
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    while (ha_tokudb_prepare_drop_index_wait) sleep(1); // debug

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    int error;
    DB_TXN* txn = NULL;

    error = db_env->txn_begin(db_env, 0, &txn, 0);
    if (error) { goto cleanup; }
    
    error = drop_indexes(table_arg, key_num, num_of_keys, txn);
    if (error) { goto cleanup; }

cleanup:
    if (txn) {
        if (error) {
            abort_txn(txn);
            restore_drop_indexes(table_arg, key_num, num_of_keys);
        }
        else {
            commit_txn(txn,0);
        }
    }
    TOKUDB_DBUG_RETURN(error);
}

7909
volatile int ha_tokudb_final_drop_index_wait = 0; // debug
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//  ***********NOTE*******************
// Although prepare_drop_index is supposed to just get the DB's ready for removal,
// and not actually do the removal, we are doing it here and not in final_drop_index
// For the flags we expose in alter_table_flags, namely xxx_NO_WRITES, this is allowed
// Changes for "future-proofing" this so that it works when we have the equivalent flags
// that are not NO_WRITES are not worth it at the moments, therefore, we can make
// this function just return
int ha_tokudb::final_drop_index(TABLE *table_arg) {
    TOKUDB_DBUG_ENTER("ha_tokudb::final_drop_index");
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    while (ha_tokudb_final_drop_index_wait) sleep(1); // debug
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    int error = 0;
    TOKUDB_DBUG_RETURN(error);
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}

7926
void ha_tokudb::print_error(int error, myf errflag) {
7927
    if (error == DB_LOCK_DEADLOCK)
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        error = HA_ERR_LOCK_DEADLOCK;
7929
    if (error == DB_LOCK_NOTGRANTED)
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        error = HA_ERR_LOCK_WAIT_TIMEOUT;
7931
#if defined(HA_ERR_DISK_FULL)
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    if (error == ENOSPC) {
        error = HA_ERR_DISK_FULL;
    }
7935
#endif
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    if (error == DB_KEYEXIST) {
        error = HA_ERR_FOUND_DUPP_KEY;
    }
7939
#if defined(HA_ALTER_ERROR)
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    if (error == HA_ALTER_ERROR) {
        error = HA_ERR_UNSUPPORTED;
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    }
#endif
7944 7945
    // TODO: should rename debug code to something better
    // just reusing this so that tests don' start complaining
7946
#if MYSQL_VERSION_ID < 50500
7947
    if ((tokudb_debug & TOKUDB_DEBUG_HIDE_DDL_LOCK_ERRORS) == 0) {
7948
        THD* thd = ha_thd();
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        if (get_log_client_errors(thd)) {
            sql_print_error("query \"%s\" returned handler error %d", thd->query_string.str, error);
        }
7952
    }
7953
#endif
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    handler::print_error(error, errflag);
}

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#if 0 // QQQ use default
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//
// This function will probably need to be redone from scratch
// if we ever choose to implement it
//
7962
int ha_tokudb::analyze(THD * thd, HA_CHECK_OPT * check_opt) {
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    uint i;
    DB_BTREE_STAT *stat = 0;
    DB_TXN_STAT *txn_stat_ptr = 0;
    tokudb_trx_data *trx = (tokudb_trx_data *) thd->ha_data[tokudb_hton->slot];
    DBUG_ASSERT(trx);

    for (i = 0; i < table_share->keys; i++) {
        if (stat) {
            free(stat);
            stat = 0;
        }
        if ((key_file[i]->stat) (key_file[i], trx->all, (void *) &stat, 0))
            goto err;
        share->rec_per_key[i] = (stat->bt_ndata / (stat->bt_nkeys ? stat->bt_nkeys : 1));
    }
    /* A hidden primary key is not in key_file[] */
    if (hidden_primary_key) {
        if (stat) {
            free(stat);
            stat = 0;
        }
        if ((file->stat) (file, trx->all, (void *) &stat, 0))
            goto err;
    }
    pthread_mutex_lock(&share->mutex);
    share->status |= STATUS_TOKUDB_ANALYZE;        // Save status on close
    share->version++;           // Update stat in table
    pthread_mutex_unlock(&share->mutex);
    update_status(share, table);        // Write status to file
    if (stat)
        free(stat);
    return ((share->status & STATUS_TOKUDB_ANALYZE) ? HA_ADMIN_FAILED : HA_ADMIN_OK);

  err:
    if (stat)
        free(stat);
    return HA_ADMIN_FAILED;
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}
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#endif
8002

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volatile int ha_tokudb_optimize_wait = 0; // debug

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// flatten all DB's in this table, to do so, just do a full scan on every DB
8006
int ha_tokudb::optimize(THD * thd, HA_CHECK_OPT * check_opt) {
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    TOKUDB_DBUG_ENTER("ha_tokudb::optimize");
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    while (ha_tokudb_optimize_wait) sleep(1); // debug

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    int error;
    uint curr_num_DBs = table->s->keys + test(hidden_primary_key);
    //
8013
    // for each DB, run optimize and hot_optimize
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    //
    for (uint i = 0; i < curr_num_DBs; i++) {
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        DB* db = share->key_file[i];
        error = db->optimize(db);
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        if (error) {
            goto cleanup;
        }
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        struct hot_optimize_context hc;
        memset(&hc, 0, sizeof hc);
        hc.thd = thd;
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        hc.write_status_msg = this->write_status_msg;
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        hc.ha = this;
        hc.current_table = i;
        hc.num_tables = curr_num_DBs;
        error = db->hot_optimize(db, hot_poll_fun, &hc);
8029
        if (error) {
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            goto cleanup;
        }
    }

    error = 0;
cleanup:
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    TOKUDB_DBUG_RETURN(error);
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}

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//
// truncate's dictionary associated with keynr index using transaction txn
// does so by deleting and then recreating the dictionary in the context
// of a transaction
//
int ha_tokudb::truncate_dictionary( uint keynr, DB_TXN* txn ) {
    int error;
    bool is_pk = (keynr == primary_key);
    
    error = share->key_file[keynr]->close(share->key_file[keynr], 0);
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    assert(error == 0);
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    share->key_file[keynr] = NULL;
    if (is_pk) { share->file = NULL; }

    if (is_pk) {
        error = delete_or_rename_dictionary(
            share->table_name, 
            NULL,
            "main", 
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            false, //is_key
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            txn,
            true // is a delete
            );
        if (error) { goto cleanup; }
    }
    else {
        error = delete_or_rename_dictionary(
            share->table_name, 
            NULL,
            table_share->key_info[keynr].name, 
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            true, //is_key
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            txn,
            true // is a delete
            );
        if (error) { goto cleanup; }
    }

    if (is_pk) {
8078
        error = create_main_dictionary(share->table_name, table, txn, &share->kc_info);
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    }
    else {
        error = create_secondary_dictionary(
            share->table_name, 
            table, 
            &table_share->key_info[keynr], 
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            txn,
            &share->kc_info,
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            keynr,
            false
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            );
    }
    if (error) { goto cleanup; }

cleanup:
    return error;
}

8097
volatile int ha_tokudb_truncate_wait = 0; // debug
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// for 5.5
int ha_tokudb::truncate() {
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    TOKUDB_DBUG_ENTER("truncate");
    while (ha_tokudb_truncate_wait) sleep(1); // debug

    int error = delete_all_rows();
    TOKUDB_DBUG_RETURN(error);
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}


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// delete all rows from a table
//
// effects: delete all of the rows in the main dictionary and all of the
// indices.  this must be atomic, so we use the statement transaction
// for all of the truncate operations.
// locks:  if we have an exclusive table write lock, all of the concurrency
// issues go away.
// returns: 0 if success

int ha_tokudb::delete_all_rows() {
    TOKUDB_DBUG_ENTER("delete_all_rows");
    int error = 0;
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8121
    uint curr_num_DBs = 0;
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    DB_TXN* txn = NULL;

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    // XXX 4530 lock the key file array for writing
    share_key_file_wrlock(share);

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    error = db_env->txn_begin(db_env, 0, &txn, 0);
    if (error) { goto cleanup; }
8129

8130
    if (thd_sql_command(ha_thd()) != SQLCOM_TRUNCATE) {
8131
        share->try_table_lock = true;
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        error = HA_ERR_WRONG_COMMAND;
        goto cleanup;
    }

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8136
    curr_num_DBs = table->s->keys + test(hidden_primary_key);
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    for (uint i = 0; i < curr_num_DBs; i++) {
        error = share->key_file[i]->pre_acquire_fileops_lock(
            share->key_file[i], 
            txn
            );
        if (error) { goto cleanup; }
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        error = share->key_file[i]->pre_acquire_table_lock(
            share->key_file[i], 
            txn
            );
        if (error) { goto cleanup; }
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    }
8149
    for (uint i = 0; i < curr_num_DBs; i++) {
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        error = truncate_dictionary(i, txn);
        if (error) { goto cleanup; }
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    }

    // zap the row count
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8155
    if (error == 0) {
8156
        share->rows = 0;
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8157
    }
8158

8159
    share->try_table_lock = true;
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8160
cleanup:
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    if (txn) {
        if (error) {
            abort_txn(txn);
        }
        else {
            commit_txn(txn,0);
        }
    }

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    if (error == DB_LOCK_NOTGRANTED && ((tokudb_debug & TOKUDB_DEBUG_HIDE_DDL_LOCK_ERRORS) == 0)) {
        sql_print_error("Could not truncate table %s because another transaction has accessed the \
        table. To truncate the table, make sure no transactions touch the table.", 
        share->table_name);
    }
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    //
    // regardless of errors, need to reopen the DB's
    //    
    for (uint i = 0; i < curr_num_DBs; i++) {
        int r = 0;
        if (share->key_file[i] == NULL) {
            if (i != primary_key) {
                r = open_secondary_dictionary(
                    &share->key_file[i], 
                    &table_share->key_info[i],
                    share->table_name,
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8186
                    false, // 
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                    NULL
                    );
                assert(!r);
            }
            else {
                r = open_main_dictionary(
                    share->table_name, 
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8194
                    false, 
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                    NULL
                    );
                assert(!r);
            }
        }
    }
8201 8202
    // XXX 4530 unlock the key file lock
    share_key_file_unlock(share);
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    TOKUDB_DBUG_RETURN(error);
}

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void ha_tokudb::set_loader_error(int err) {
    loader_error = err;
}
void ha_tokudb::set_dup_value_for_pk(DBT* key) {
    assert(!hidden_primary_key);
    unpack_key(table->record[0],key,primary_key);
    last_dup_key = primary_key;
}
8214

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//
// MySQL sets the null_bit as a number that you can bit-wise AND a byte to
// to evaluate whether a field is NULL or not. This value is a power of 2, from
// 2^0 to 2^7. We return the position of the bit within the byte, which is
// lg null_bit
//
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inline u_int32_t get_null_bit_position(u_int32_t null_bit) {
    u_int32_t retval = 0;
    switch(null_bit) {
    case (1):
        retval = 0;
        break;
    case (2):
        retval = 1;
        break;
    case (4):
        retval = 2;
        break;
    case (8):
        retval = 3;
        break;
    case (16):
        retval = 4;
        break;
    case (32):
        retval = 5;
        break;
    case (64):
        retval = 6;
        break;
    case (128):
        retval = 7;
        break;        
    default:
        assert(false);
    }
    return retval;
}

8254 8255 8256
//
// checks whether the bit at index pos in data is set or not
//
8257 8258 8259 8260 8261 8262 8263
inline bool is_overall_null_position_set(uchar* data, u_int32_t pos) {
    u_int32_t offset = pos/8;
    uchar remainder = pos%8; 
    uchar null_bit = 1<<remainder;
    return ((data[offset] & null_bit) != 0);
}

8264 8265 8266
//
// sets the bit at index pos in data to 1 if is_null, 0 otherwise
// 
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inline void set_overall_null_position(uchar* data, u_int32_t pos, bool is_null) {
    u_int32_t offset = pos/8;
    uchar remainder = pos%8;
    uchar null_bit = 1<<remainder;
    if (is_null) {
        data[offset] |= null_bit;
    }
    else {
        data[offset] &= ~null_bit;
    }
}

8279 8280 8281
//
// returns the index of the null bit of field. 
//
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inline u_int32_t get_overall_null_bit_position(TABLE* table, Field* field) {
    u_int32_t offset = get_null_offset(table, field);
    u_int32_t null_bit = field->null_bit;
    return offset*8 + get_null_bit_position(null_bit);
}


bool are_null_bits_in_order(TABLE* table) {
    u_int32_t curr_null_pos = 0;
    bool first = true;
    bool retval = true;
    for (uint i = 0; i < table->s->fields; i++) {
        Field* curr_field = table->field[i];
        bool nullable = (curr_field->null_bit != 0);
        if (nullable) {
            u_int32_t pos = get_overall_null_bit_position(
                table,
                curr_field
                );
            if (!first && pos != curr_null_pos+1){
                retval = false;
                break;
            }
            first = false;
            curr_null_pos = pos;
        }
    }
    return retval;
}

u_int32_t get_first_null_bit_pos(TABLE* table) {
    u_int32_t table_pos = 0;
    for (uint i = 0; i < table->s->fields; i++) {
        Field* curr_field = table->field[i];
        bool nullable = (curr_field->null_bit != 0);
        if (nullable) {
            table_pos = get_overall_null_bit_position(
                table,
                curr_field
                );
            break;
        }
    }
    return table_pos;
}

bool is_column_default_null(TABLE* src_table, u_int32_t field_index) {
    Field* curr_field = src_table->field[field_index];
    bool is_null_default = false;
    bool nullable = curr_field->null_bit != 0;
    if (nullable) {
        u_int32_t null_bit_position = get_overall_null_bit_position(src_table, curr_field);
        is_null_default = is_overall_null_position_set(
            src_table->s->default_values,
            null_bit_position
            );
    }
    return is_null_default;
}

8342
bool tables_have_same_keys(TABLE* table, TABLE* altered_table, bool print_error, bool check_field_index) {
8343 8344 8345 8346 8347 8348 8349 8350 8351 8352 8353 8354 8355 8356 8357 8358 8359 8360 8361 8362 8363 8364 8365 8366 8367 8368 8369 8370 8371 8372 8373 8374 8375 8376 8377 8378 8379 8380 8381 8382 8383 8384 8385 8386 8387 8388 8389 8390 8391 8392 8393 8394 8395 8396 8397 8398 8399 8400 8401 8402 8403 8404 8405 8406 8407 8408 8409 8410 8411 8412 8413 8414 8415 8416 8417 8418 8419 8420 8421 8422 8423 8424 8425 8426 8427 8428
    bool retval;
    if (table->s->keys != altered_table->s->keys) {
        if (print_error) {
            sql_print_error("tables have different number of keys");
        }
        retval = false;
        goto cleanup;
    }
    if (table->s->primary_key != altered_table->s->primary_key) {
        if (print_error) {
            sql_print_error(
                "Tables have different primary keys, %d %d", 
                table->s->primary_key,
                altered_table->s->primary_key
                );
        }
        retval = false;
        goto cleanup;
    }
    for (u_int32_t i=0; i < table->s->keys; i++) {
        KEY* curr_orig_key = &table->key_info[i];
        KEY* curr_altered_key = &altered_table->key_info[i];
        if (strcmp(curr_orig_key->name, curr_altered_key->name)) {
            if (print_error) {
                sql_print_error(
                    "key %d has different name, %s %s", 
                    i, 
                    curr_orig_key->name,
                    curr_altered_key->name
                    );
            }
            retval = false;
            goto cleanup;
        }
        if (((curr_orig_key->flags & HA_CLUSTERING) == 0) != ((curr_altered_key->flags & HA_CLUSTERING) == 0)) {
            if (print_error) {
                sql_print_error(
                    "keys disagree on if they are clustering, %d, %d",
                    curr_orig_key->key_parts,
                    curr_altered_key->key_parts
                    );
            }
            retval = false;
            goto cleanup;
        }
        if (((curr_orig_key->flags & HA_NOSAME) == 0) != ((curr_altered_key->flags & HA_NOSAME) == 0)) {
            if (print_error) {
                sql_print_error(
                    "keys disagree on if they are unique, %d, %d",
                    curr_orig_key->key_parts,
                    curr_altered_key->key_parts
                    );
            }
            retval = false;
            goto cleanup;
        }
        if (curr_orig_key->key_parts != curr_altered_key->key_parts) {
            if (print_error) {
                sql_print_error(
                    "keys have different number of parts, %d, %d",
                    curr_orig_key->key_parts,
                    curr_altered_key->key_parts
                    );
            }
            retval = false;
            goto cleanup;
        }
        //
        // now verify that each field in the key is the same
        //
        for (u_int32_t j = 0; j < curr_orig_key->key_parts; j++) {
            KEY_PART_INFO* curr_orig_part = &curr_orig_key->key_part[j];
            KEY_PART_INFO* curr_altered_part = &curr_altered_key->key_part[j];
            Field* curr_orig_field = curr_orig_part->field;
            Field* curr_altered_field = curr_altered_part->field;
            if (curr_orig_part->length != curr_altered_part->length) {
                if (print_error) {
                    sql_print_error(
                        "Key %s has different length at index %d", 
                        curr_orig_key->name, 
                        j
                        );
                }
                retval = false;
                goto cleanup;
            }
8429 8430 8431 8432 8433 8434 8435
            bool are_fields_same;
            are_fields_same = (check_field_index) ? 
                (curr_orig_part->fieldnr == curr_altered_part->fieldnr && 
                 fields_are_same_type(curr_orig_field, curr_altered_field)) :
                (are_two_fields_same(curr_orig_field,curr_altered_field));
                
            if (!are_fields_same) {
8436 8437 8438 8439 8440 8441 8442 8443 8444 8445 8446 8447 8448 8449 8450 8451 8452 8453
                if (print_error) {
                    sql_print_error(
                        "Key %s has different field at index %d", 
                        curr_orig_key->name, 
                        j
                        );
                }
                retval = false;
                goto cleanup;
            }
        }
    }

    retval = true;
cleanup:
    return retval;
}

8454 8455
#if defined(HA_GENERAL_ONLINE)

8456 8457 8458 8459 8460 8461 8462
void ha_tokudb::print_alter_info(
    TABLE *altered_table,
    HA_CREATE_INFO *create_info,
    HA_ALTER_FLAGS *alter_flags,
    uint table_changes
    )
{
8463
    printf("***are keys of two tables same? %d\n", tables_have_same_keys(table,altered_table,false, false));
8464 8465 8466 8467 8468 8469 8470 8471 8472 8473 8474 8475 8476 8477 8478 8479 8480 8481 8482 8483 8484 8485 8486 8487 8488 8489 8490 8491 8492 8493 8494 8495 8496 8497 8498 8499 8500 8501 8502 8503 8504 8505 8506 8507 8508 8509 8510 8511 8512 8513 8514 8515 8516 8517 8518 8519 8520 8521 8522 8523 8524 8525 8526 8527 8528 8529
    printf("***alter flags set ***\n");
    for (uint i = 0; i < HA_MAX_ALTER_FLAGS; i++) {
      if (alter_flags->is_set(i)) {
        printf("flag: %d\n", i);
      }
    }
    //
    // everyone calculates data by doing some default_values - record[0], but I do not see why
    // that is necessary
    //
    printf("******\n");
    printf("***orig table***\n");
    for (uint i = 0; i < table->s->fields; i++) {
      //
      // make sure to use table->field, and NOT table->s->field
      //
      Field* curr_field = table->field[i];
      uint null_offset = get_null_offset(table, curr_field);
      printf(
          "name: %s, nullable: %d, null_offset: %d, is_null_field: %d, is_null %d, \n", 
          curr_field->field_name, 
          curr_field->null_bit,
          null_offset,
          (curr_field->null_ptr != NULL),
          (curr_field->null_ptr != NULL) ? table->s->default_values[null_offset] & curr_field->null_bit : 0xffffffff
          );
    }
    printf("******\n");
    printf("***altered table***\n");
    for (uint i = 0; i < altered_table->s->fields; i++) {
      Field* curr_field = altered_table->field[i];
      uint null_offset = get_null_offset(altered_table, curr_field);
      printf(
         "name: %s, nullable: %d, null_offset: %d, is_null_field: %d, is_null %d, \n", 
         curr_field->field_name, 
         curr_field->null_bit,
         null_offset,
         (curr_field->null_ptr != NULL),
         (curr_field->null_ptr != NULL) ? altered_table->s->default_values[null_offset] & curr_field->null_bit : 0xffffffff
         );
    }
    printf("******\n");
}


int find_changed_columns(
    u_int32_t* changed_columns,
    u_int32_t* num_changed_columns,
    TABLE* smaller_table, 
    TABLE* bigger_table
    ) 
{
    uint curr_new_col_index = 0;
    uint i = 0;
    int retval;
    u_int32_t curr_num_changed_columns=0;
    assert(bigger_table->s->fields > smaller_table->s->fields);
    for (i = 0; i < smaller_table->s->fields; i++, curr_new_col_index++) {
        if (curr_new_col_index >= bigger_table->s->fields) {
            sql_print_error("error in determining changed columns");
            retval = 1;
            goto cleanup;
        }
        Field* curr_field_in_new = bigger_table->field[curr_new_col_index];
        Field* curr_field_in_orig = smaller_table->field[i];
        while (!fields_have_same_name(curr_field_in_orig, curr_field_in_new)) {
8530 8531 8532 8533
            changed_columns[curr_num_changed_columns] = curr_new_col_index;
            curr_num_changed_columns++;
            curr_new_col_index++;
            curr_field_in_new = bigger_table->field[curr_new_col_index];
8534 8535 8536 8537 8538 8539 8540 8541 8542 8543 8544 8545 8546 8547 8548 8549 8550 8551 8552 8553 8554 8555 8556 8557 8558 8559 8560 8561 8562
            if (curr_new_col_index >= bigger_table->s->fields) {
                sql_print_error("error in determining changed columns");
                retval = 1;
                goto cleanup;
            }
        }
        // at this point, curr_field_in_orig and curr_field_in_new should be the same, let's verify
        // make sure the two fields that have the same name are ok
        if (!are_two_fields_same(curr_field_in_orig, curr_field_in_new)) {
            sql_print_error(
                "Two fields that were supposedly the same are not: \
                %s in original, %s in new", 
                curr_field_in_orig->field_name,
                curr_field_in_new->field_name
                );
            retval = 1;
            goto cleanup;
        }
    }
    for (i = curr_new_col_index; i < bigger_table->s->fields; i++) {
        changed_columns[curr_num_changed_columns] = i;
        curr_num_changed_columns++;
    }
    *num_changed_columns = curr_num_changed_columns;
    retval = 0;
cleanup:
    return retval;
}

8563 8564 8565 8566 8567 8568 8569 8570 8571 8572 8573 8574 8575 8576 8577 8578 8579 8580 8581 8582 8583 8584 8585 8586 8587 8588 8589 8590 8591 8592 8593 8594 8595 8596 8597 8598 8599 8600 8601 8602 8603 8604 8605 8606 8607 8608 8609 8610 8611 8612 8613 8614 8615 8616 8617 8618 8619 8620 8621
bool column_rename_supported(
    HA_ALTER_INFO* alter_info, 
    TABLE* orig_table, 
    TABLE* new_table
    ) 
{
    bool retval = false;
    bool keys_same_for_cr;
    uint num_fields_with_different_names = 0;
    uint field_with_different_name = orig_table->s->fields;
    if (orig_table->s->fields != new_table->s->fields) {
        retval = false;
        goto cleanup;
    }
    if (alter_info->contains_first_or_after) {
        retval = false;
        goto cleanup;
    }

    for (uint i = 0; i < orig_table->s->fields; i++) {
        Field* orig_field = orig_table->field[i];
        Field* new_field = new_table->field[i];
        if (!fields_are_same_type(orig_field, new_field)) {
            retval = false;
            goto cleanup;
        }
        if (!fields_have_same_name(orig_field, new_field)) {
            num_fields_with_different_names++;
            field_with_different_name = i;
        }
    }
    // only allow one renamed field
    if (num_fields_with_different_names != 1) {
        retval = false;
        goto cleanup;
    }
    assert(field_with_different_name < orig_table->s->fields);
    //
    // at this point, we have verified that the two tables have
    // the same field types and with ONLY one field with a different name. 
    // We have also identified the field with the different name
    //
    // Now we need to check the indexes
    //
    keys_same_for_cr = tables_have_same_keys(
        orig_table,
        new_table,
        false,
        true
        );
    if (!keys_same_for_cr) {
        retval = false;
        goto cleanup;
    }
    retval = true;
cleanup:
    return retval;
}

8622 8623 8624
int ha_tokudb::check_if_supported_alter(TABLE *altered_table,
    HA_CREATE_INFO *create_info,
    HA_ALTER_FLAGS *alter_flags,
8625
    HA_ALTER_INFO  *alter_info,
8626 8627 8628 8629 8630
    uint table_changes)
{
    TOKUDB_DBUG_ENTER("check_if_supported_alter");
    int retval;
    THD* thd = ha_thd(); 
8631
    bool keys_same = tables_have_same_keys(table,altered_table, false, false);
8632 8633 8634


    if (tokudb_debug & TOKUDB_DEBUG_ALTER_TABLE_INFO) {
8635
      printf("has after or first %d\n", alter_info->contains_first_or_after);
8636 8637 8638 8639
        print_alter_info(altered_table, create_info, alter_flags, table_changes);
    }
    bool has_added_columns = alter_flags->is_set(HA_ADD_COLUMN);
    bool has_dropped_columns = alter_flags->is_set(HA_DROP_COLUMN);
8640 8641
    bool has_column_rename = alter_flags->is_set(HA_CHANGE_COLUMN) && 
                             alter_flags->is_set(HA_ALTER_COLUMN_NAME);
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    //
    // We do not check for changes to foreign keys or primary keys. They are not supported
    // Changing the primary key implies changing keys in all dictionaries. that is why we don't
    // try to make it fast
    //
8647 8648 8649 8650 8651 8652 8653
    bool has_indexing_changes = alter_flags->is_set(HA_DROP_INDEX) || 
                                alter_flags->is_set(HA_DROP_UNIQUE_INDEX) ||
                                alter_flags->is_set(HA_ADD_INDEX) ||
                                alter_flags->is_set(HA_ADD_UNIQUE_INDEX);
    bool has_non_indexing_changes = false;
    bool has_non_dropped_changes = false;
    bool has_non_added_changes = false;
8654
    bool has_non_column_rename_changes = false;
8655 8656 8657 8658 8659 8660 8661 8662 8663 8664 8665 8666 8667
    for (uint i = 0; i < HA_MAX_ALTER_FLAGS; i++) {
        if (i == HA_DROP_INDEX ||
            i == HA_DROP_UNIQUE_INDEX ||
            i == HA_ADD_INDEX ||
            i == HA_ADD_UNIQUE_INDEX)
        {
            continue;
        }
        if (alter_flags->is_set(i)) {
            has_non_indexing_changes = true;
            break;
        }
    }
8668 8669 8670 8671 8672 8673 8674 8675 8676 8677 8678
    for (uint i = 0; i < HA_MAX_ALTER_FLAGS; i++) {
        if (i == HA_ALTER_COLUMN_NAME||
            i == HA_CHANGE_COLUMN)
        {
            continue;
        }
        if (alter_flags->is_set(i)) {
            has_non_column_rename_changes = true;
            break;
        }
    }
8679 8680 8681 8682 8683 8684 8685 8686 8687 8688 8689 8690 8691 8692 8693 8694 8695 8696 8697 8698 8699 8700 8701 8702 8703 8704 8705 8706 8707 8708
    for (uint i = 0; i < HA_MAX_ALTER_FLAGS; i++) {
        if (i == HA_DROP_COLUMN) {
            continue;
        }
        if (keys_same && 
            (i == HA_ALTER_INDEX || i == HA_ALTER_UNIQUE_INDEX || i == HA_ALTER_PK_INDEX)) {
            continue;
        }
        if (alter_flags->is_set(i)) {
            has_non_dropped_changes = true;
            break;
        }
    }
    for (uint i = 0; i < HA_MAX_ALTER_FLAGS; i++) {
        if (i == HA_ADD_COLUMN) {
            continue;
        }
        if (keys_same && 
            (i == HA_ALTER_INDEX || i == HA_ALTER_UNIQUE_INDEX || i == HA_ALTER_PK_INDEX)) {
            continue;
        }
        if (alter_flags->is_set(i)) {
            has_non_added_changes = true;
            break;
        }
    }

    if (tokudb_debug & TOKUDB_DEBUG_ALTER_TABLE_INFO) {
        printf("has indexing changes %d, has non indexing changes %d\n", has_indexing_changes, has_non_indexing_changes);
    }
8709 8710 8711 8712 8713 8714 8715 8716
#ifdef MARIADB_BASE_VERSION
#if MYSQL_VERSION_ID >= 50203
    if (table->s->vfields || altered_table->s->vfields) {
      retval = HA_ALTER_ERROR;
      goto cleanup;
    }
#endif
#endif
8717 8718 8719 8720 8721 8722 8723 8724 8725 8726 8727 8728 8729 8730 8731 8732 8733 8734 8735 8736 8737 8738 8739 8740 8741 8742 8743 8744 8745 8746 8747 8748 8749 8750 8751 8752 8753 8754 8755 8756 8757 8758 8759 8760 8761 8762 8763 8764 8765 8766 8767 8768 8769 8770 8771 8772 8773 8774 8775 8776 8777 8778 8779 8780 8781 8782 8783 8784 8785 8786 8787 8788 8789
    if (table->s->tmp_table != NO_TMP_TABLE) {
      retval = (get_disable_slow_alter(thd)) ? HA_ALTER_ERROR : HA_ALTER_NOT_SUPPORTED;
      goto cleanup;
    }
    if (!(are_null_bits_in_order(table) && 
          are_null_bits_in_order(altered_table)
          )
       ) 
    {
        sql_print_error("Problems parsing null bits of the original and altered table");
        retval = (get_disable_slow_alter(thd)) ? HA_ALTER_ERROR : HA_ALTER_NOT_SUPPORTED;
        goto cleanup;
    }
    if (has_added_columns && !has_non_added_changes) {
        u_int32_t added_columns[altered_table->s->fields];
        u_int32_t num_added_columns = 0;
        int r = find_changed_columns(
            added_columns,
            &num_added_columns,
            table,
            altered_table
            );
        if (r) {
            retval = (get_disable_slow_alter(thd)) ? HA_ALTER_ERROR : HA_ALTER_NOT_SUPPORTED;
            goto cleanup;
        }
        if (tokudb_debug & TOKUDB_DEBUG_ALTER_TABLE_INFO) {
            for (u_int32_t i = 0; i < num_added_columns; i++) {
                u_int32_t curr_added_index = added_columns[i];
                Field* curr_added_field = altered_table->field[curr_added_index];
                printf(
                    "Added column: index %d, name %s\n", 
                    curr_added_index, 
                    curr_added_field->field_name
                    );
            }
        }
    }
    if (has_dropped_columns && !has_non_dropped_changes) {
        u_int32_t dropped_columns[table->s->fields];
        u_int32_t num_dropped_columns = 0;
        int r = find_changed_columns(
            dropped_columns,
            &num_dropped_columns,
            altered_table,
            table
            );
        if (r) {
            retval = (get_disable_slow_alter(thd)) ? HA_ALTER_ERROR : HA_ALTER_NOT_SUPPORTED;
            goto cleanup;
        }
        if (tokudb_debug & TOKUDB_DEBUG_ALTER_TABLE_INFO) {
            for (u_int32_t i = 0; i < num_dropped_columns; i++) {
                u_int32_t curr_dropped_index = dropped_columns[i];
                Field* curr_dropped_field = table->field[curr_dropped_index];
                printf(
                    "Dropped column: index %d, name %s\n", 
                    curr_dropped_index, 
                    curr_dropped_field->field_name
                    );
            }
        }
    }
    
    if (has_indexing_changes && !has_non_indexing_changes) {
        retval = HA_ALTER_SUPPORTED_WAIT_LOCK;
    }
    else if (has_dropped_columns && !has_non_dropped_changes) {
        retval = HA_ALTER_SUPPORTED_WAIT_LOCK;
    }
    else if (has_added_columns && !has_non_added_changes) {
        retval = HA_ALTER_SUPPORTED_WAIT_LOCK;
    }
8790 8791 8792 8793 8794 8795 8796 8797 8798 8799 8800 8801 8802 8803 8804 8805 8806 8807 8808 8809 8810 8811 8812
    else if (has_column_rename && !has_non_column_rename_changes) {
        // we have identified a possible column rename, 
        // but let's do some more checks

        // we will only allow an hcr if there are no changes
        // in column positions
        if (alter_info->contains_first_or_after) {
            retval = (get_disable_slow_alter(thd)) ? HA_ALTER_ERROR : HA_ALTER_NOT_SUPPORTED;
            goto cleanup;
        }

        // now need to verify that one and only one column
        // has changed only its name. If we find anything to
        // the contrary, we don't allow it, also check indexes

        bool cr_supported = column_rename_supported(alter_info, table, altered_table);
        if (cr_supported) {
            retval = HA_ALTER_SUPPORTED_WAIT_LOCK;
        }
        else {
            retval = (get_disable_slow_alter(thd)) ? HA_ALTER_ERROR : HA_ALTER_NOT_SUPPORTED;
        }
    }
8813 8814 8815 8816 8817 8818 8819 8820 8821 8822 8823 8824 8825 8826 8827 8828 8829 8830 8831 8832 8833 8834 8835 8836 8837 8838 8839 8840 8841 8842 8843 8844 8845 8846 8847 8848 8849 8850 8851 8852 8853 8854 8855 8856 8857 8858 8859 8860 8861 8862 8863 8864 8865 8866 8867 8868 8869 8870 8871 8872 8873 8874 8875 8876 8877 8878 8879 8880 8881 8882 8883 8884 8885 8886 8887 8888 8889 8890 8891 8892 8893 8894 8895 8896 8897 8898 8899 8900 8901 8902 8903 8904 8905 8906 8907 8908 8909 8910 8911 8912 8913 8914 8915 8916 8917 8918 8919 8920 8921 8922 8923 8924 8925 8926 8927 8928 8929 8930 8931 8932 8933 8934 8935 8936 8937 8938 8939 8940 8941 8942 8943 8944 8945 8946 8947 8948 8949 8950 8951 8952 8953 8954 8955 8956 8957 8958 8959 8960 8961 8962 8963 8964 8965 8966 8967 8968 8969 8970 8971 8972 8973 8974 8975 8976 8977 8978 8979 8980 8981 8982 8983 8984 8985 8986 8987 8988 8989 8990 8991 8992 8993 8994 8995 8996 8997 8998 8999 9000 9001 9002 9003 9004 9005 9006 9007 9008 9009 9010 9011 9012 9013 9014 9015 9016 9017 9018 9019 9020 9021 9022 9023 9024 9025 9026 9027 9028 9029 9030 9031 9032 9033 9034 9035 9036 9037 9038 9039 9040 9041 9042 9043 9044 9045 9046 9047 9048 9049 9050 9051 9052 9053 9054 9055 9056 9057 9058 9059 9060 9061 9062 9063 9064 9065 9066 9067 9068 9069 9070 9071 9072 9073 9074 9075 9076 9077 9078 9079 9080 9081 9082 9083 9084 9085 9086 9087 9088 9089 9090 9091 9092 9093 9094 9095 9096 9097 9098 9099 9100 9101 9102 9103 9104
    else { 
        retval = (get_disable_slow_alter(thd)) ? HA_ALTER_ERROR : HA_ALTER_NOT_SUPPORTED;
    }
cleanup:
    DBUG_RETURN(retval);
}

#define UP_COL_ADD_OR_DROP 0

#define COL_DROP 0xaa
#define COL_ADD 0xbb

#define COL_FIXED 0xcc
#define COL_VAR 0xdd
#define COL_BLOB 0xee



#define STATIC_ROW_MUTATOR_SIZE 1+8+2+8+8+8

/*
how much space do I need for the mutators?
static stuff first:
1 - UP_COL_ADD_OR_DROP
8 - old null, new null
2 - old num_offset, new num_offset
8 - old fixed_field size, new fixed_field_size
8 - old and new length of offsets
8 - old and new starting null bit position
TOTAL: 27

dynamic stuff:
4 - number of columns
for each column:
1 - add or drop
1 - is nullable
4 - if nullable, position
1 - if add, whether default is null or not
1 - if fixed, var, or not
 for fixed, entire default
 for var, 4 bytes length, then entire default
 for blob, nothing
So, an upperbound is 4 + num_fields(12) + all default stuff

static blob stuff:
4 - num blobs
1 byte for each num blobs in old table
So, an upperbound is 4 + kc_info->num_blobs

dynamic blob stuff:
for each blob added:
1 - state if we are adding or dropping
4 - blob index
if add, 1 len bytes
 at most, 4 0's
So, upperbound is num_blobs(1+4+1+4) = num_columns*10
*/
u_int32_t fill_static_row_mutator(
    uchar* buf, 
    TABLE* orig_table,
    TABLE* altered_table,
    KEY_AND_COL_INFO* orig_kc_info,
    KEY_AND_COL_INFO* altered_kc_info,
    u_int32_t keynr
    ) 
{
    //
    // start packing extra
    //
    uchar* pos = buf;
    // says what the operation is
    pos[0] = UP_COL_ADD_OR_DROP;
    pos++;
    
    //
    // null byte information
    //
    memcpy(pos, &orig_table->s->null_bytes, sizeof(orig_table->s->null_bytes));
    pos += sizeof(orig_table->s->null_bytes);
    memcpy(pos, &altered_table->s->null_bytes, sizeof(orig_table->s->null_bytes));
    pos += sizeof(altered_table->s->null_bytes);
    
    //
    // num_offset_bytes
    //
    assert(orig_kc_info->num_offset_bytes <= 2);
    pos[0] = orig_kc_info->num_offset_bytes;
    pos++;
    assert(altered_kc_info->num_offset_bytes <= 2);
    pos[0] = altered_kc_info->num_offset_bytes;
    pos++;
    
    //
    // size of fixed fields
    //
    u_int32_t fixed_field_size = orig_kc_info->mcp_info[keynr].fixed_field_size;
    memcpy(pos, &fixed_field_size, sizeof(fixed_field_size));
    pos += sizeof(fixed_field_size);
    fixed_field_size = altered_kc_info->mcp_info[keynr].fixed_field_size;
    memcpy(pos, &fixed_field_size, sizeof(fixed_field_size));
    pos += sizeof(fixed_field_size);
    
    //
    // length of offsets
    //
    u_int32_t len_of_offsets = orig_kc_info->mcp_info[keynr].len_of_offsets;
    memcpy(pos, &len_of_offsets, sizeof(len_of_offsets));
    pos += sizeof(len_of_offsets);
    len_of_offsets = altered_kc_info->mcp_info[keynr].len_of_offsets;
    memcpy(pos, &len_of_offsets, sizeof(len_of_offsets));
    pos += sizeof(len_of_offsets);

    u_int32_t orig_start_null_pos = get_first_null_bit_pos(orig_table);
    memcpy(pos, &orig_start_null_pos, sizeof(orig_start_null_pos));
    pos += sizeof(orig_start_null_pos);
    u_int32_t altered_start_null_pos = get_first_null_bit_pos(altered_table);
    memcpy(pos, &altered_start_null_pos, sizeof(altered_start_null_pos));
    pos += sizeof(altered_start_null_pos);

    assert((pos-buf) == STATIC_ROW_MUTATOR_SIZE);
    return pos - buf;
}


u_int32_t fill_dynamic_row_mutator(
    uchar* buf,
    u_int32_t* columns, 
    u_int32_t num_columns,
    TABLE* src_table,
    KEY_AND_COL_INFO* src_kc_info,
    u_int32_t keynr,
    bool is_add,
    bool* out_has_blobs
    ) 
{
    uchar* pos = buf;
    bool has_blobs = false;
    u_int32_t cols = num_columns;
    memcpy(pos, &cols, sizeof(cols));
    pos += sizeof(cols);
    for (u_int32_t i = 0; i < num_columns; i++) {
        u_int32_t curr_index = columns[i];
        Field* curr_field = src_table->field[curr_index];
    
        pos[0] = is_add ? COL_ADD : COL_DROP;
        pos++;
        //
        // NULL bit information
        //
        bool is_null_default = false;
        bool nullable = curr_field->null_bit != 0;
        if (!nullable) {
            pos[0] = 0;
            pos++;
        }
        else {
            pos[0] = 1;
            pos++;
            // write position of null byte that is to be removed
            u_int32_t null_bit_position = get_overall_null_bit_position(src_table, curr_field);
            memcpy(pos, &null_bit_position, sizeof(null_bit_position));
            pos += sizeof(null_bit_position);
            //
            // if adding a column, write the value of the default null_bit
            //
            if (is_add) {
                is_null_default = is_overall_null_position_set(
                    src_table->s->default_values,
                    null_bit_position
                    );
                pos[0] = is_null_default ? 1 : 0;
                pos++;
            }
        }
        if (src_kc_info->field_lengths[curr_index] != 0) {
            // we have a fixed field being dropped
            // store the offset and the number of bytes
            pos[0] = COL_FIXED;
            pos++;
            //store the offset
            u_int32_t fixed_field_offset = src_kc_info->cp_info[keynr][curr_index].col_pack_val;
            memcpy(pos, &fixed_field_offset, sizeof(fixed_field_offset));
            pos += sizeof(fixed_field_offset);
            //store the number of bytes
            u_int32_t num_bytes = src_kc_info->field_lengths[curr_index];
            memcpy(pos, &num_bytes, sizeof(num_bytes));
            pos += sizeof(num_bytes);
            if (is_add && !is_null_default) {
                uint curr_field_offset = field_offset(curr_field, src_table);
                memcpy(
                    pos, 
                    src_table->s->default_values + curr_field_offset, 
                    num_bytes
                    );
                pos += num_bytes;
            }
        }
        else if (src_kc_info->length_bytes[curr_index] != 0) {
            pos[0] = COL_VAR;
            pos++;
            //store the index of the variable column
            u_int32_t var_field_index = src_kc_info->cp_info[keynr][curr_index].col_pack_val;
            memcpy(pos, &var_field_index, sizeof(var_field_index));
            pos += sizeof(var_field_index);
            if (is_add && !is_null_default) {
                uint curr_field_offset = field_offset(curr_field, src_table);
                u_int32_t len_bytes = src_kc_info->length_bytes[curr_index];
                u_int32_t data_length = get_var_data_length(
                    src_table->s->default_values + curr_field_offset,
                    len_bytes
                    );
                memcpy(pos, &data_length, sizeof(data_length));
                pos += sizeof(data_length);
                memcpy(
                    pos, 
                    src_table->s->default_values + curr_field_offset + len_bytes,
                    data_length
                    );
                pos += data_length;
            }
        }
        else {
            pos[0] = COL_BLOB;
            pos++;
            has_blobs = true;
        }
    }
    *out_has_blobs = has_blobs;
    return pos-buf;
}


u_int32_t fill_static_blob_row_mutator(
    uchar* buf,
    TABLE* src_table,
    KEY_AND_COL_INFO* src_kc_info
    ) 
{
    uchar* pos = buf;
    // copy number of blobs
    memcpy(pos, &src_kc_info->num_blobs, sizeof(src_kc_info->num_blobs));
    pos += sizeof(src_kc_info->num_blobs);
    // copy length bytes for each blob
    for (u_int32_t i = 0; i < src_kc_info->num_blobs; i++) {
        u_int32_t curr_field_index = src_kc_info->blob_fields[i]; 
        Field* field = src_table->field[curr_field_index];
        u_int32_t len_bytes = field->row_pack_length();
        assert(len_bytes <= 4);
        pos[0] = len_bytes;
        pos++;
    }
    
    return pos-buf;
}

u_int32_t fill_dynamic_blob_row_mutator(
    uchar* buf,
    u_int32_t* columns, 
    u_int32_t num_columns,
    TABLE* src_table,
    KEY_AND_COL_INFO* src_kc_info,
    bool is_add
    ) 
{
    uchar* pos = buf;
    for (u_int32_t i = 0; i < num_columns; i++) {
        u_int32_t curr_field_index = columns[i];
        Field* curr_field = src_table->field[curr_field_index];
        if (src_kc_info->field_lengths[curr_field_index] == 0 && 
            src_kc_info->length_bytes[curr_field_index]== 0
            ) 
        {
            // find out which blob it is
            u_int32_t blob_index = src_kc_info->num_blobs;
            for (u_int32_t j = 0; j < src_kc_info->num_blobs; j++) {
                if (curr_field_index  == src_kc_info->blob_fields[j]) {
                    blob_index = j;
                    break;
                }
            }
            // assert we found blob in list
            assert(blob_index < src_kc_info->num_blobs);
            pos[0] = is_add ? COL_ADD : COL_DROP;
            pos++;
            memcpy(pos, &blob_index, sizeof(blob_index));
            pos += sizeof(blob_index);
            if (is_add) {
                u_int32_t len_bytes = curr_field->row_pack_length();
                assert(len_bytes <= 4);
                pos[0] = len_bytes;
                pos++;

9105 9106 9107 9108 9109
                // create a zero length blob field that can be directly copied in
                // for now, in MySQL, we can only have blob fields 
                // that have no default value
                bzero(pos,len_bytes);
                pos += len_bytes;
9110 9111 9112 9113 9114 9115 9116 9117 9118 9119 9120 9121 9122 9123 9124 9125 9126 9127 9128 9129 9130 9131 9132 9133 9134 9135 9136 9137 9138 9139 9140 9141 9142 9143 9144 9145 9146 9147 9148 9149 9150 9151 9152 9153 9154 9155 9156 9157 9158 9159 9160 9161 9162 9163 9164 9165 9166 9167 9168 9169 9170 9171 9172 9173 9174 9175 9176 9177 9178 9179 9180 9181 9182 9183 9184 9185 9186 9187 9188 9189 9190 9191 9192 9193 9194 9195 9196 9197 9198 9199 9200 9201 9202 9203 9204 9205 9206 9207 9208 9209 9210 9211 9212 9213 9214 9215 9216 9217 9218 9219 9220 9221 9222 9223 9224 9225 9226 9227 9228 9229 9230 9231 9232 9233 9234 9235
            }
        }
        else {
            // not a blob, continue
            continue;
        }
    }
    return pos-buf;
}

// TODO: carefully review to make sure that the right information is used
// TODO: namely, when do we get stuff from share->kc_info and when we get
// TODO: it from altered_kc_info, and when is keynr associated with the right thing
u_int32_t ha_tokudb::fill_row_mutator(
    uchar* buf, 
    u_int32_t* columns, 
    u_int32_t num_columns,
    TABLE* altered_table,
    KEY_AND_COL_INFO* altered_kc_info,
    u_int32_t keynr,
    bool is_add
    ) 
{
    if (tokudb_debug & TOKUDB_DEBUG_ALTER_TABLE_INFO) {
        printf("*****some info:*************\n");
        printf(
            "old things: num_null_bytes %d, num_offset_bytes %d, fixed_field_size %d, fixed_field_size %d\n",
            table->s->null_bytes,
            share->kc_info.num_offset_bytes,
            share->kc_info.mcp_info[keynr].fixed_field_size,
            share->kc_info.mcp_info[keynr].len_of_offsets
            );
        printf(
            "new things: num_null_bytes %d, num_offset_bytes %d, fixed_field_size %d, fixed_field_size %d\n",
            altered_table->s->null_bytes,
            altered_kc_info->num_offset_bytes,
            altered_kc_info->mcp_info[keynr].fixed_field_size,
            altered_kc_info->mcp_info[keynr].len_of_offsets
            );
        printf("****************************\n");
    }
    uchar* pos = buf;
    bool has_blobs = false;
    pos += fill_static_row_mutator(
        pos,
        table,
        altered_table,
        &share->kc_info,
        altered_kc_info,
        keynr
        );
    
    if (is_add) {
        pos += fill_dynamic_row_mutator(
            pos,
            columns,
            num_columns,
            altered_table,
            altered_kc_info,
            keynr,
            is_add,
            &has_blobs
            );
    }
    else {
        pos += fill_dynamic_row_mutator(
            pos,
            columns,
            num_columns,
            table,
            &share->kc_info,
            keynr,
            is_add,
            &has_blobs
            );
    }
    if (has_blobs) {
        pos += fill_static_blob_row_mutator(
            pos,
            table,
            &share->kc_info
            );
        if (is_add) {
            pos += fill_dynamic_blob_row_mutator(
                pos,
                columns,
                num_columns,
                altered_table,
                altered_kc_info,
                is_add
                );
        }
        else {
            pos += fill_dynamic_blob_row_mutator(
                pos,
                columns,
                num_columns,
                table,
                &share->kc_info,
                is_add
                );
        }
    }
    return pos-buf;
}

int ha_tokudb::alter_table_phase2(
    THD *thd,
    TABLE *altered_table,
    HA_CREATE_INFO *create_info,
    HA_ALTER_INFO *alter_info,
    HA_ALTER_FLAGS *alter_flags
    )
{
    TOKUDB_DBUG_ENTER("ha_tokudb::alter_table_phase2");
    int error;
    DB_TXN* txn = NULL;
    bool incremented_numDBs = false;
    bool modified_DBs = false;
    bool has_dropped_columns = alter_flags->is_set(HA_DROP_COLUMN);
    bool has_added_columns = alter_flags->is_set(HA_ADD_COLUMN);
    KEY_AND_COL_INFO altered_kc_info;
    bzero(&altered_kc_info, sizeof(altered_kc_info));
    u_int32_t max_new_desc_size = 0;
    uchar* row_desc_buff = NULL;
    uchar* column_extra = NULL; 
9236 9237
    bool dropping_indexes = alter_info->index_drop_count > 0 && !tables_have_same_keys(table,altered_table,false, false);
    bool adding_indexes = alter_info->index_add_count > 0 && !tables_have_same_keys(table,altered_table,false, false);
9238 9239 9240 9241 9242 9243 9244 9245 9246 9247 9248 9249 9250 9251 9252 9253 9254 9255 9256 9257 9258 9259 9260 9261 9262 9263 9264 9265 9266 9267 9268 9269 9270 9271 9272 9273 9274 9275 9276 9277 9278 9279 9280 9281 9282 9283 9284 9285 9286 9287 9288 9289 9290 9291 9292 9293 9294 9295 9296 9297 9298 9299 9300 9301 9302 9303 9304 9305 9306 9307 9308 9309 9310 9311 9312 9313 9314 9315 9316 9317 9318 9319 9320
    tokudb_trx_data* trx = (tokudb_trx_data *) thd_data_get(thd, tokudb_hton->slot);

    is_fast_alter_running = true;

    if (!trx || 
        (trx->all != NULL) || 
        (trx->sp_level != NULL) ||
        (trx->stmt == NULL) ||
        (trx->sub_sp_level != trx->stmt)
       )
    {
      error = HA_ERR_UNSUPPORTED;
      goto cleanup;
    }
    txn = trx->stmt;

    error = allocate_key_and_col_info(altered_table->s, &altered_kc_info);
    if (error) { goto cleanup; }

    max_new_desc_size = get_max_desc_size(&altered_kc_info, altered_table);
    row_desc_buff = (uchar *)my_malloc(max_new_desc_size, MYF(MY_WME));
    if (row_desc_buff == NULL){ error = ENOMEM; goto cleanup;}

    // drop indexes
    if (dropping_indexes) {
        error = drop_indexes(table, alter_info->index_drop_buffer, alter_info->index_drop_count, txn);
        if (error) { goto cleanup; }
    }

    // add indexes
    if (adding_indexes) {
        KEY           *key_info;
        KEY           *key;
        uint          *idx_p;
        uint          *idx_end_p;
        KEY_PART_INFO *key_part;
        KEY_PART_INFO *part_end;
        /* The add_index() method takes an array of KEY structs. */
        key_info= (KEY*) thd->alloc(sizeof(KEY) * alter_info->index_add_count);
        key= key_info;
        for (idx_p= alter_info->index_add_buffer, idx_end_p= idx_p + alter_info->index_add_count;
             idx_p < idx_end_p;
             idx_p++, key++)
        {
          /* Copy the KEY struct. */
          *key= alter_info->key_info_buffer[*idx_p];
          /* Fix the key parts. */
          part_end= key->key_part + key->key_parts;
          for (key_part= key->key_part; key_part < part_end; key_part++)
            key_part->field = table->field[key_part->fieldnr];
        }
        error = tokudb_add_index(
            table, 
            key_info,
            alter_info->index_add_count,
            txn,
            &incremented_numDBs,
            &modified_DBs
            );
        if (error) { 
            // hack for now, in case of duplicate key error, 
            // because at the moment we cannot display the right key
            // information to the user, so that he knows potentially what went
            // wrong.
            last_dup_key = MAX_KEY;
            goto cleanup;
        }
    }

    if (has_dropped_columns || has_added_columns) {
        DBT column_dbt;
        bzero(&column_dbt, sizeof(DBT));
        u_int32_t max_column_extra_size;
        u_int32_t num_column_extra;
        u_int32_t columns[table->s->fields + altered_table->s->fields]; // set size such that we know it is big enough for both cases
        u_int32_t num_columns = 0;
        u_int32_t curr_num_DBs = table->s->keys + test(hidden_primary_key);
        memset(columns, 0, sizeof(columns));

        if (has_added_columns && has_dropped_columns) {
            error = HA_ERR_UNSUPPORTED;
            goto cleanup;
        }
9321
        if (!tables_have_same_keys(table, altered_table, true, false)) {
9322 9323 9324 9325 9326 9327 9328 9329 9330 9331 9332 9333 9334 9335 9336 9337 9338 9339 9340 9341 9342 9343 9344 9345 9346 9347 9348 9349 9350 9351 9352 9353 9354 9355 9356 9357 9358 9359 9360 9361 9362 9363 9364 9365 9366 9367 9368 9369 9370 9371 9372 9373 9374 9375 9376 9377 9378 9379 9380 9381 9382 9383 9384 9385 9386 9387 9388 9389 9390 9391 9392 9393 9394 9395 9396 9397 9398 9399 9400 9401 9402 9403 9404 9405 9406 9407 9408 9409 9410 9411 9412 9413 9414 9415 9416 9417 9418 9419 9420 9421
            error = HA_ERR_UNSUPPORTED;
            goto cleanup;
        }

        error = initialize_key_and_col_info(
            altered_table->s, 
            altered_table,
            &altered_kc_info,
            hidden_primary_key,
            primary_key
            );
        if (error) { goto cleanup; }

        // generate the array of columns
        if (has_dropped_columns) {
            find_changed_columns(
                columns,
                &num_columns,
                altered_table,
                table
                );
        }
        if (has_added_columns) {
            find_changed_columns(
                columns,
                &num_columns,
                table,
                altered_table
                );
        }
        max_column_extra_size = 
            STATIC_ROW_MUTATOR_SIZE + //max static row_mutator
            4 + num_columns*(1+1+4+1+1+4) + altered_table->s->reclength + // max dynamic row_mutator
            (4 + share->kc_info.num_blobs) + // max static blob size
            (num_columns*(1+4+1+4)); // max dynamic blob size
        column_extra = (uchar *)my_malloc(max_column_extra_size, MYF(MY_WME));
        if (column_extra == NULL) { error = ENOMEM; goto cleanup; }

        for (u_int32_t i = 0; i < curr_num_DBs; i++) {
            DBT row_descriptor;
            bzero(&row_descriptor, sizeof(row_descriptor));
            KEY* prim_key = (hidden_primary_key) ? NULL : &altered_table->s->key_info[primary_key];
            KEY* key_info = &altered_table->key_info[i];
            if (i == primary_key) {
                row_descriptor.size = create_main_key_descriptor(
                    row_desc_buff,
                    prim_key,
                    hidden_primary_key,
                    primary_key,
                    altered_table,
                    &altered_kc_info
                    );
                    row_descriptor.data = row_desc_buff;
            }
            else {
                row_descriptor.size = create_secondary_key_descriptor(
                    row_desc_buff,
                    key_info,
                    prim_key,
                    hidden_primary_key,
                    altered_table,
                    primary_key,
                    i,
                    &altered_kc_info
                    );
                row_descriptor.data = row_desc_buff;
            }
            error = share->key_file[i]->change_descriptor(
                share->key_file[i],
                txn,
                &row_descriptor,
                0
                );
            if (error) { goto cleanup; }
            
            if (i == primary_key || table_share->key_info[i].flags & HA_CLUSTERING) {
                num_column_extra = fill_row_mutator(
                    column_extra,
                    columns,
                    num_columns,
                    altered_table,
                    &altered_kc_info,
                    i,
                    has_added_columns // true if adding columns, otherwise is a drop
                    );
                
                column_dbt.data = column_extra;
                column_dbt.size = num_column_extra;
                DBUG_ASSERT(num_column_extra <= max_column_extra_size);
                
                error = share->key_file[i]->update_broadcast(
                    share->key_file[i],
                    txn,
                    &column_dbt,
                    DB_IS_RESETTING_OP
                    );
                if (error) { goto cleanup; }
            }
        }
    }
9422 9423 9424 9425 9426 9427 9428

    // update frm file    
    // only for tables that are not partitioned
    if (altered_table->part_info == NULL) {
        error = write_frm_data(share->status_block, txn, altered_table->s->path.str);
        if (error) { goto cleanup; }
    }    
9429 9430 9431 9432 9433 9434 9435 9436 9437 9438 9439 9440 9441 9442 9443 9444 9445 9446 9447 9448 9449 9450 9451 9452 9453 9454 9455 9456 9457 9458 9459 9460 9461 9462 9463 9464 9465 9466 9467 9468 9469 9470 9471 9472 9473 9474 9475 9476 9477 9478 9479 9480 9481 9482 9483 9484 9485 9486 9487 9488 9489 9490 9491 9492 9493 9494 9495 9496 9497 9498 9499 9500 9501 9502 9503 9504 9505 9506 9507 9508 9509 9510 9511 9512 9513 9514 9515 9516 9517 9518 9519 9520 9521 9522 9523 9524 9525 9526 9527 9528 9529 9530 9531 9532 9533 9534 9535 9536 9537 9538 9539 9540 9541 9542 9543 9544 9545 9546 9547 9548 9549 9550 9551 9552 9553 9554 9555 9556 9557 9558 9559 9560 9561 9562 9563 9564 9565 9566 9567 9568 9569 9570 9571 9572 9573 9574 9575 9576 9577 9578 9579 9580 9581 9582 9583 9584 9585 9586 9587 9588 9589 9590 9591 9592 9593 9594 9595 9596 9597 9598 9599 9600 9601 9602 9603 9604 9605 9606 9607 9608 9609 9610 9611 9612 9613 9614 9615 9616 9617 9618 9619 9620 9621 9622 9623 9624 9625 9626 9627 9628 9629 9630 9631 9632 9633 9634 9635 9636 9637 9638 9639 9640 9641 9642 9643 9644 9645 9646 9647 9648 9649 9650 9651 9652 9653 9654 9655 9656 9657 9658 9659 9660 9661 9662 9663 9664 9665 9666 9667 9668 9669 9670 9671 9672 9673 9674 9675 9676 9677 9678 9679 9680 9681 9682 9683 9684 9685 9686 9687 9688 9689 9690 9691 9692 9693 9694 9695 9696 9697 9698 9699 9700 9701 9702 9703 9704 9705 9706 9707 9708 9709 9710 9711 9712 9713 9714 9715 9716 9717 9718 9719 9720 9721 9722 9723 9724 9725 9726 9727 9728 9729 9730 9731 9732 9733 9734 9735 9736 9737 9738 9739 9740 9741 9742 9743 9744 9745 9746 9747 9748 9749 9750 9751 9752 9753 9754 9755 9756 9757 9758 9759 9760 9761 9762 9763 9764 9765 9766 9767 9768 9769 9770 9771 9772 9773 9774 9775 9776 9777 9778 9779 9780 9781 9782 9783 9784 9785 9786 9787 9788 9789 9790 9791 9792 9793 9794 9795 9796 9797 9798 9799 9800 9801 9802 9803 9804 9805 9806 9807 9808 9809 9810 9811 9812 9813 9814 9815 9816 9817 9818 9819 9820 9821 9822 9823 9824 9825 9826 9827 9828 9829 9830 9831 9832 9833 9834 9835 9836 9837 9838 9839 9840 9841 9842 9843 9844 9845 9846 9847 9848 9849 9850 9851 9852 9853 9854 9855 9856 9857 9858 9859 9860 9861 9862 9863 9864 9865 9866 9867 9868 9869 9870 9871 9872 9873 9874 9875 9876 9877 9878 9879 9880 9881 9882 9883 9884 9885 9886 9887 9888 9889 9890 9891 9892 9893 9894 9895 9896 9897 9898 9899 9900 9901 9902 9903 9904 9905 9906 9907 9908 9909 9910 9911 9912 9913 9914 9915 9916 9917 9918 9919 9920 9921 9922 9923 9924 9925 9926 9927 9928 9929 9930 9931 9932 9933 9934 9935 9936 9937 9938 9939 9940 9941 9942 9943 9944 9945 9946 9947 9948 9949 9950 9951 9952 9953 9954 9955 9956 9957 9958 9959 9960 9961 9962
    if (thd->killed) {
        error = ER_ABORTING_CONNECTION;
        goto cleanup;
    }

    error = 0;    
cleanup:
    free_key_and_col_info(&altered_kc_info);
    my_free(row_desc_buff, MYF(MY_ALLOW_ZERO_PTR));
    my_free(column_extra, MYF(MY_ALLOW_ZERO_PTR));
    if (txn) {
        if (error) {
            if (adding_indexes) {
                restore_add_index(table, alter_info->index_add_count, incremented_numDBs, modified_DBs);
            }
            abort_txn(txn);
            trx->stmt = NULL;
            trx->sub_sp_level = NULL;
            if (dropping_indexes) {
                restore_drop_indexes(table, alter_info->index_drop_buffer, alter_info->index_drop_count);
            }
        }
    }
    TOKUDB_DBUG_RETURN(error);
}

inline void copy_null_bits(
    u_int32_t start_old_pos,
    u_int32_t start_new_pos,
    u_int32_t num_bits,
    uchar* old_null_bytes,
    uchar* new_null_bytes
    ) 
{
    for (u_int32_t i = 0; i < num_bits; i++) {
        u_int32_t curr_old_pos = i + start_old_pos;
        u_int32_t curr_new_pos = i + start_new_pos;
        // copy over old null bytes
        if (is_overall_null_position_set(old_null_bytes,curr_old_pos)) {
            set_overall_null_position(new_null_bytes,curr_new_pos,true);
        }
        else {
            set_overall_null_position(new_null_bytes,curr_new_pos,false);
        }
    }
}

inline void copy_var_fields(
    u_int32_t start_old_num_var_field, //index of var fields that we should start writing
    u_int32_t num_var_fields, // number of var fields to copy
    uchar* old_var_field_offset_ptr, //static ptr to where offset bytes begin in old row
    uchar old_num_offset_bytes, //number of offset bytes used in old row
    uchar* start_new_var_field_data_ptr, // where the new var data should be written
    uchar* start_new_var_field_offset_ptr, // where the new var offsets should be written
    uchar* new_var_field_data_ptr, // pointer to beginning of var fields in new row
    uchar* old_var_field_data_ptr, // pointer to beginning of var fields in old row
    u_int32_t new_num_offset_bytes, // number of offset bytes used in new row
    u_int32_t* num_data_bytes_written,
    u_int32_t* num_offset_bytes_written
    ) 
{
    uchar* curr_new_var_field_data_ptr = start_new_var_field_data_ptr;
    uchar* curr_new_var_field_offset_ptr = start_new_var_field_offset_ptr;
    for (u_int32_t i = 0; i < num_var_fields; i++) {
        u_int32_t field_len;
        u_int32_t start_read_offset;
        u_int32_t curr_old = i + start_old_num_var_field;
        uchar* data_to_copy = NULL;
        // get the length and pointer to data that needs to be copied
        get_var_field_info(
            &field_len, 
            &start_read_offset, 
            curr_old, 
            old_var_field_offset_ptr, 
            old_num_offset_bytes
            );
        data_to_copy = old_var_field_data_ptr + start_read_offset;
        // now need to copy field_len bytes starting from data_to_copy
        curr_new_var_field_data_ptr = write_var_field(
            curr_new_var_field_offset_ptr,
            curr_new_var_field_data_ptr,
            new_var_field_data_ptr,
            data_to_copy,
            field_len,
            new_num_offset_bytes
            );
        curr_new_var_field_offset_ptr += new_num_offset_bytes;
    }
    *num_data_bytes_written = (u_int32_t)(curr_new_var_field_data_ptr - start_new_var_field_data_ptr);
    *num_offset_bytes_written = (u_int32_t)(curr_new_var_field_offset_ptr - start_new_var_field_offset_ptr);
}

inline u_int32_t copy_toku_blob(uchar* to_ptr, uchar* from_ptr, u_int32_t len_bytes, bool skip) {
    u_int32_t length = 0;
    if (!skip) {
        memcpy(to_ptr, from_ptr, len_bytes);
    }
    length = get_blob_field_len(from_ptr,len_bytes);
    if (!skip) {
        memcpy(to_ptr + len_bytes, from_ptr + len_bytes, length);
    }
    return (length + len_bytes);
}

int tokudb_update_fun(
    DB* db,
    const DBT *key,
    const DBT *old_val, 
    const DBT *extra,
    void (*set_val)(const DBT *new_val, void *set_extra),
    void *set_extra
    ) 
{
    u_int32_t max_num_bytes;
    u_int32_t num_columns;
    DBT new_val;
    u_int32_t num_bytes_left;
    u_int32_t num_var_fields_to_copy;
    u_int32_t num_data_bytes_written = 0;
    u_int32_t num_offset_bytes_written = 0;
    int error;
    bzero(&new_val, sizeof(DBT));
    uchar operation;
    uchar* new_val_data = NULL;
    uchar* extra_pos = NULL;
    uchar* extra_pos_start = NULL;
    //
    // info for pointers into rows
    //
    u_int32_t old_num_null_bytes;
    u_int32_t new_num_null_bytes;
    uchar old_num_offset_bytes;
    uchar new_num_offset_bytes;
    u_int32_t old_fixed_field_size;
    u_int32_t new_fixed_field_size;
    u_int32_t old_len_of_offsets;
    u_int32_t new_len_of_offsets;

    uchar* old_fixed_field_ptr = NULL;
    uchar* new_fixed_field_ptr = NULL;
    u_int32_t curr_old_fixed_offset;
    u_int32_t curr_new_fixed_offset;

    uchar* old_null_bytes = NULL;
    uchar* new_null_bytes = NULL;
    u_int32_t curr_old_null_pos;
    u_int32_t curr_new_null_pos;    
    u_int32_t old_null_bits_left;
    u_int32_t new_null_bits_left;
    u_int32_t overall_null_bits_left;

    u_int32_t old_num_var_fields;
    u_int32_t new_num_var_fields;
    u_int32_t curr_old_num_var_field;
    u_int32_t curr_new_num_var_field;
    uchar* old_var_field_offset_ptr = NULL;
    uchar* new_var_field_offset_ptr = NULL;
    uchar* curr_new_var_field_offset_ptr = NULL;
    uchar* old_var_field_data_ptr = NULL;
    uchar* new_var_field_data_ptr = NULL;
    uchar* curr_new_var_field_data_ptr = NULL;

    u_int32_t start_blob_offset;
    uchar* start_blob_ptr;
    u_int32_t num_blob_bytes;

    // came across a delete, nothing to update
    if (old_val == NULL) {
        error = 0;
        goto cleanup;
    }

    extra_pos_start = (uchar *)extra->data;
    extra_pos = (uchar *)extra->data;

    operation = extra_pos[0];
    extra_pos++;
    assert(operation == UP_COL_ADD_OR_DROP);

    memcpy(&old_num_null_bytes, extra_pos, sizeof(u_int32_t));
    extra_pos += sizeof(u_int32_t);
    memcpy(&new_num_null_bytes, extra_pos, sizeof(u_int32_t));
    extra_pos += sizeof(u_int32_t);

    old_num_offset_bytes = extra_pos[0];
    extra_pos++;
    new_num_offset_bytes = extra_pos[0];
    extra_pos++;

    memcpy(&old_fixed_field_size, extra_pos, sizeof(u_int32_t));
    extra_pos += sizeof(u_int32_t);
    memcpy(&new_fixed_field_size, extra_pos, sizeof(u_int32_t));
    extra_pos += sizeof(u_int32_t);

    memcpy(&old_len_of_offsets, extra_pos, sizeof(u_int32_t));
    extra_pos += sizeof(u_int32_t);
    memcpy(&new_len_of_offsets, extra_pos, sizeof(u_int32_t));
    extra_pos += sizeof(u_int32_t);

    max_num_bytes = old_val->size + extra->size + new_len_of_offsets + new_fixed_field_size;
    new_val_data = (uchar *)my_malloc(
        max_num_bytes, 
        MYF(MY_FAE)
        );
    if (new_val_data == NULL) { goto cleanup; }

    old_fixed_field_ptr = (uchar *) old_val->data;
    old_fixed_field_ptr += old_num_null_bytes;
    new_fixed_field_ptr = new_val_data + new_num_null_bytes;
    curr_old_fixed_offset = 0;
    curr_new_fixed_offset = 0;

    old_num_var_fields = old_len_of_offsets/old_num_offset_bytes;
    new_num_var_fields = new_len_of_offsets/new_num_offset_bytes;
    // following fields will change as we write the variable data
    old_var_field_offset_ptr = old_fixed_field_ptr + old_fixed_field_size;
    new_var_field_offset_ptr = new_fixed_field_ptr + new_fixed_field_size;
    old_var_field_data_ptr = old_var_field_offset_ptr + old_len_of_offsets;
    new_var_field_data_ptr = new_var_field_offset_ptr + new_len_of_offsets;
    curr_new_var_field_offset_ptr = new_var_field_offset_ptr;
    curr_new_var_field_data_ptr = new_var_field_data_ptr;
    curr_old_num_var_field = 0;
    curr_new_num_var_field = 0;

    old_null_bytes = (uchar *)old_val->data;
    new_null_bytes = new_val_data;

    
    memcpy(&curr_old_null_pos, extra_pos, sizeof(u_int32_t));
    extra_pos += sizeof(u_int32_t);
    memcpy(&curr_new_null_pos, extra_pos, sizeof(u_int32_t));
    extra_pos += sizeof(u_int32_t);

    memcpy(&num_columns, extra_pos, sizeof(num_columns));
    extra_pos += sizeof(num_columns);
    
    //
    // now go through and apply the change into new_val_data
    //
    for (u_int32_t i = 0; i < num_columns; i++) {
        uchar op_type = extra_pos[0];
        bool is_null_default = false;
        extra_pos++;

        assert(op_type == COL_DROP || op_type == COL_ADD);
        bool nullable = (extra_pos[0] != 0);
        extra_pos++;
        if (nullable) {
            u_int32_t null_bit_position;
            memcpy(&null_bit_position, extra_pos, sizeof(u_int32_t));
            extra_pos += sizeof(u_int32_t);
            u_int32_t num_bits;
            if (op_type == COL_DROP) {
                assert(curr_old_null_pos <= null_bit_position);
                num_bits = null_bit_position - curr_old_null_pos;
            }
            else {
                assert(curr_new_null_pos <= null_bit_position);
                num_bits = null_bit_position - curr_new_null_pos;
            }
            copy_null_bits(
                curr_old_null_pos,
                curr_new_null_pos,
                num_bits,
                old_null_bytes,
                new_null_bytes
                );
            // update the positions
            curr_new_null_pos += num_bits;
            curr_old_null_pos += num_bits;
            if (op_type == COL_DROP) {
                curr_old_null_pos++; // account for dropped column
            }
            else {
                is_null_default = (extra_pos[0] != 0);
                extra_pos++;
                set_overall_null_position(
                    new_null_bytes,
                    null_bit_position,
                    is_null_default
                    );
                curr_new_null_pos++; //account for added column
            }
        }
        uchar col_type = extra_pos[0];
        extra_pos++;
        if (col_type == COL_FIXED) {
            u_int32_t col_offset;
            u_int32_t col_size;
            u_int32_t num_bytes_to_copy;
            memcpy(&col_offset, extra_pos, sizeof(u_int32_t));
            extra_pos += sizeof(u_int32_t);
            memcpy(&col_size, extra_pos, sizeof(u_int32_t));
            extra_pos += sizeof(u_int32_t);

            if (op_type == COL_DROP) {
                num_bytes_to_copy = col_offset - curr_old_fixed_offset;
            }
            else {
                num_bytes_to_copy = col_offset - curr_new_fixed_offset;
            }
            memcpy(
                new_fixed_field_ptr + curr_new_fixed_offset,
                old_fixed_field_ptr + curr_old_fixed_offset, 
                num_bytes_to_copy
                );
            curr_old_fixed_offset += num_bytes_to_copy;
            curr_new_fixed_offset += num_bytes_to_copy;
            if (op_type == COL_DROP) {
                // move old_fixed_offset val to skip OVER column that is being dropped
                curr_old_fixed_offset += col_size;
            }
            else {
                if (is_null_default) {
                    // copy zeroes
                    bzero(new_fixed_field_ptr + curr_new_fixed_offset, col_size);
                }
                else {
                    // copy data from extra_pos into new row
                    memcpy(
                        new_fixed_field_ptr + curr_new_fixed_offset,
                        extra_pos,
                        col_size
                        );
                    extra_pos += col_size;
                }
                curr_new_fixed_offset += col_size;
            }
            
        }
        else if (col_type == COL_VAR) {
            u_int32_t var_col_index;
            memcpy(&var_col_index, extra_pos, sizeof(u_int32_t));
            extra_pos += sizeof(u_int32_t);
            if (op_type == COL_DROP) {
                num_var_fields_to_copy = var_col_index - curr_old_num_var_field;
            }
            else {
                num_var_fields_to_copy = var_col_index - curr_new_num_var_field;
            }
            copy_var_fields(
                curr_old_num_var_field,
                num_var_fields_to_copy,
                old_var_field_offset_ptr,
                old_num_offset_bytes,
                curr_new_var_field_data_ptr,
                curr_new_var_field_offset_ptr,
                new_var_field_data_ptr, // pointer to beginning of var fields in new row
                old_var_field_data_ptr, // pointer to beginning of var fields in old row
                new_num_offset_bytes, // number of offset bytes used in new row
                &num_data_bytes_written,
                &num_offset_bytes_written
                );
            curr_new_var_field_data_ptr += num_data_bytes_written;
            curr_new_var_field_offset_ptr += num_offset_bytes_written;
            curr_new_num_var_field += num_var_fields_to_copy;
            curr_old_num_var_field += num_var_fields_to_copy;
            if (op_type == COL_DROP) {
                curr_old_num_var_field++; // skip over dropped field
            }
            else {
                if (is_null_default) {
                    curr_new_var_field_data_ptr = write_var_field(
                        curr_new_var_field_offset_ptr,
                        curr_new_var_field_data_ptr,
                        new_var_field_data_ptr,
                        NULL, //copying no data
                        0, //copying 0 bytes
                        new_num_offset_bytes
                        );
                    curr_new_var_field_offset_ptr += new_num_offset_bytes;
                }
                else {
                    u_int32_t data_length;
                    memcpy(&data_length, extra_pos, sizeof(data_length));
                    extra_pos += sizeof(data_length);
                    curr_new_var_field_data_ptr = write_var_field(
                        curr_new_var_field_offset_ptr,
                        curr_new_var_field_data_ptr,
                        new_var_field_data_ptr,
                        extra_pos, //copying data from mutator
                        data_length, //copying data_length bytes
                        new_num_offset_bytes
                        );
                    extra_pos += data_length;
                    curr_new_var_field_offset_ptr += new_num_offset_bytes;
                }
                curr_new_num_var_field++; //account for added column
            }
        }
        else if (col_type == COL_BLOB) {
            // handle blob data later
            continue;
        }
        else {
            assert(false);
        }
    }
    // finish copying the null stuff
    old_null_bits_left = 8*old_num_null_bytes - curr_old_null_pos;
    new_null_bits_left = 8*new_num_null_bytes - curr_new_null_pos;
    overall_null_bits_left = old_null_bits_left;
    set_if_smaller(overall_null_bits_left, new_null_bits_left);
    copy_null_bits(
        curr_old_null_pos,
        curr_new_null_pos,
        overall_null_bits_left,
        old_null_bytes,
        new_null_bytes
        );
    // finish copying fixed field stuff
    num_bytes_left = old_fixed_field_size - curr_old_fixed_offset;
    memcpy(
        new_fixed_field_ptr + curr_new_fixed_offset,
        old_fixed_field_ptr + curr_old_fixed_offset, 
        num_bytes_left
        );
    curr_old_fixed_offset += num_bytes_left;
    curr_new_fixed_offset += num_bytes_left;
    // sanity check
    assert(curr_new_fixed_offset == new_fixed_field_size);

    // finish copying var field stuff
    num_var_fields_to_copy = old_num_var_fields - curr_old_num_var_field;
    copy_var_fields(
        curr_old_num_var_field,
        num_var_fields_to_copy,
        old_var_field_offset_ptr,
        old_num_offset_bytes,
        curr_new_var_field_data_ptr,
        curr_new_var_field_offset_ptr,
        new_var_field_data_ptr, // pointer to beginning of var fields in new row
        old_var_field_data_ptr, // pointer to beginning of var fields in old row
        new_num_offset_bytes, // number of offset bytes used in new row
        &num_data_bytes_written,
        &num_offset_bytes_written
        );
    curr_new_var_field_offset_ptr += num_offset_bytes_written;
    curr_new_var_field_data_ptr += num_data_bytes_written;
    // sanity check
    assert(curr_new_var_field_offset_ptr == new_var_field_data_ptr);

    // start handling blobs
    get_blob_field_info(
        &start_blob_offset, 
        old_len_of_offsets,
        old_var_field_data_ptr,
        old_num_offset_bytes
        );
    start_blob_ptr = old_var_field_data_ptr + start_blob_offset;
    // if nothing else in extra, then there are no blobs to add or drop, so can copy blobs straight
    if ((extra_pos - extra_pos_start) == extra->size) {
        num_blob_bytes = old_val->size - (start_blob_ptr - old_null_bytes);
        memcpy(curr_new_var_field_data_ptr, start_blob_ptr, num_blob_bytes);
        curr_new_var_field_data_ptr += num_blob_bytes;
    }
    // else, there is blob information to process
    else {
        uchar* len_bytes = NULL;
        u_int32_t curr_old_blob = 0;
        u_int32_t curr_new_blob = 0;
        u_int32_t num_old_blobs = 0;
        uchar* curr_old_blob_ptr = start_blob_ptr;
        memcpy(&num_old_blobs, extra_pos, sizeof(num_old_blobs));
        extra_pos += sizeof(num_old_blobs);
        len_bytes = extra_pos;
        extra_pos += num_old_blobs;
        // copy over blob fields one by one
        while ((extra_pos - extra_pos_start) < extra->size) {
            uchar op_type = extra_pos[0];
            extra_pos++;
            u_int32_t num_blobs_to_copy = 0;
            u_int32_t blob_index;
            memcpy(&blob_index, extra_pos, sizeof(blob_index));
            extra_pos += sizeof(blob_index);
            assert (op_type == COL_DROP || op_type == COL_ADD);
            if (op_type == COL_DROP) {
                num_blobs_to_copy = blob_index - curr_old_blob;
            }
            else {
                num_blobs_to_copy = blob_index - curr_new_blob;
            }
            for (u_int32_t i = 0; i < num_blobs_to_copy; i++) {
                u_int32_t num_bytes_written = copy_toku_blob(
                    curr_new_var_field_data_ptr,
                    curr_old_blob_ptr,
                    len_bytes[curr_old_blob + i],
                    false
                    );
                curr_old_blob_ptr += num_bytes_written;
                curr_new_var_field_data_ptr += num_bytes_written;
            }
            curr_old_blob += num_blobs_to_copy;
            curr_new_blob += num_blobs_to_copy;
            if (op_type == COL_DROP) {
                // skip over blob in row
                u_int32_t num_bytes = copy_toku_blob(
                    NULL,
                    curr_old_blob_ptr,
                    len_bytes[curr_old_blob],
                    true
                    );
                curr_old_blob++;
                curr_old_blob_ptr += num_bytes;
            }
            else {
                // copy new data
                u_int32_t new_len_bytes = extra_pos[0];
                extra_pos++;
                u_int32_t num_bytes = copy_toku_blob(
                    curr_new_var_field_data_ptr,
                    extra_pos,
                    new_len_bytes,
                    false
                    );
                curr_new_blob++;
                curr_new_var_field_data_ptr += num_bytes;
                extra_pos += num_bytes;
            }                
        }
        num_blob_bytes = old_val->size - (curr_old_blob_ptr - old_null_bytes);
        memcpy(curr_new_var_field_data_ptr, curr_old_blob_ptr, num_blob_bytes);
        curr_new_var_field_data_ptr += num_blob_bytes;
    }
    new_val.data = new_val_data;
    new_val.size = curr_new_var_field_data_ptr - new_val_data;
    set_val(&new_val, set_extra);
    
    error = 0;
cleanup:
    my_free(new_val_data, MYF(MY_ALLOW_ZERO_PTR));
    return error;    
}

9963 9964
#endif

9965 9966 9967 9968 9969 9970 9971 9972 9973 9974 9975 9976 9977 9978
struct check_context {
    THD *thd;
};

static int
ha_tokudb_check_progress(void *extra, float progress) {
    struct check_context *context = (struct check_context *) extra;
    int result = 0;
    if (context->thd->killed)
        result = ER_ABORTING_CONNECTION;
    return result;
}

static void
9979
ha_tokudb_check_info(THD *thd, TABLE *table, const char *msg) {
9980
    if (thd->vio_ok()) {
9981 9982
        char tablename[256];
        snprintf(tablename, sizeof tablename, "%s.%s", table->s->db.str, table->s->table_name.str);
9983 9984 9985 9986 9987 9988 9989 9990 9991
        thd->protocol->prepare_for_resend();
        thd->protocol->store(tablename, strlen(tablename), system_charset_info);
        thd->protocol->store("check", 5, system_charset_info);
        thd->protocol->store("info", 4, system_charset_info);
        thd->protocol->store(msg, strlen(msg), system_charset_info);
        thd->protocol->write();
    }
}

9992
volatile int ha_tokudb_check_verbose = 0; // debug
9993
volatile int ha_tokudb_check_wait = 0; // debug
9994 9995 9996 9997

int
ha_tokudb::check(THD *thd, HA_CHECK_OPT *check_opt) {
    TOKUDB_DBUG_ENTER("check");
9998
    while (ha_tokudb_check_wait) sleep(1); // debug
9999

10000 10001 10002
    const char *old_proc_info = thd->proc_info;
    thd_proc_info(thd, "tokudb::check");

10003 10004 10005 10006 10007 10008 10009 10010 10011 10012 10013 10014 10015 10016 10017 10018
    int result = HA_ADMIN_OK;
    int r;

    int keep_going = 1;
    if (check_opt->flags & T_QUICK) {
        keep_going = 0;
    }
    if (check_opt->flags & T_EXTEND) {
        keep_going = 1;
    }

    r = acquire_table_lock(transaction, lock_write);
    if (r != 0)
        result = HA_ADMIN_INTERNAL_ERROR;
    if (result == HA_ADMIN_OK) {
        uint32_t num_DBs = table_share->keys + test(hidden_primary_key);
10019 10020
        time_t now;
        char timebuf[32];
10021
        snprintf(write_status_msg, sizeof write_status_msg, "%s primary=%d num=%d", share->table_name, primary_key, num_DBs);
10022
        if (ha_tokudb_check_verbose) {
10023
            ha_tokudb_check_info(thd, table, write_status_msg);
10024
            now = time(0);
10025
            fprintf(stderr, "%.24s ha_tokudb::check %s\n", ctime_r(&now, timebuf), write_status_msg);
10026
        }
10027 10028 10029 10030 10031
        for (uint i = 0; i < num_DBs; i++) {
            time_t now;
            DB *db = share->key_file[i];
            const char *kname = table_share->key_info[i].name;
            if (i == primary_key)
10032
                kname = "primary"; // hidden primary key does not set name
10033
            snprintf(write_status_msg, sizeof write_status_msg, "%s key=%s %u", share->table_name, kname, i);
10034
            thd_proc_info(thd, write_status_msg);
10035
            if (ha_tokudb_check_verbose) {
10036
                ha_tokudb_check_info(thd, table, write_status_msg);
10037
                now = time(0);
10038
                fprintf(stderr, "%.24s ha_tokudb::check %s\n", ctime_r(&now, timebuf), write_status_msg);
10039
            }
10040
            struct check_context check_context = { thd };
10041
            r = db->verify_with_progress(db, ha_tokudb_check_progress, &check_context, ha_tokudb_check_verbose, keep_going);
10042
            snprintf(write_status_msg, sizeof write_status_msg, "%s key=%s %u result=%d", share->table_name, kname, i, r);
10043
            thd_proc_info(thd, write_status_msg);
10044
            if (ha_tokudb_check_verbose) {
10045
                ha_tokudb_check_info(thd, table, write_status_msg);
10046
                now = time(0);
10047
                fprintf(stderr, "%.24s ha_tokudb::check %s\n", ctime_r(&now, timebuf), write_status_msg);
10048
            }
10049
            if (result == HA_ADMIN_OK && r != 0) {
10050
                result = HA_ADMIN_CORRUPT;
10051 10052 10053
                if (!keep_going)
                    break;
            }
10054 10055 10056 10057 10058
        }
    }
    thd_proc_info(thd, old_proc_info);
    TOKUDB_DBUG_RETURN(result);
}
10059 10060 10061 10062 10063 10064 10065 10066 10067 10068 10069 10070 10071 10072 10073 10074 10075 10076 10077 10078 10079 10080 10081 10082 10083 10084 10085 10086 10087 10088 10089 10090 10091

#if MYSQL_VERSION_ID >= 50521

bool
ha_tokudb::is_alter_table_hot() {
    TOKUDB_DBUG_ENTER("is_alter_table_hot");
    bool is_hot = false;
    THD *thd = ha_thd();
    if (get_create_index_online(thd) && thd_sql_command(thd)== SQLCOM_CREATE_INDEX) {
        // this code must match the logic in ::store_lock for hot indexing
        rw_rdlock(&share->num_DBs_lock);
        if (share->num_DBs == (table->s->keys + test(hidden_primary_key))) {
            is_hot = true;
        }
        rw_unlock(&share->num_DBs_lock);
    } 
    TOKUDB_DBUG_RETURN(is_hot);
}

#endif

void
ha_tokudb::prepare_for_alter() {
    TOKUDB_DBUG_ENTER("prepare_for_alter");
#if MYSQL_VERSION_ID >= 50521
    // remove the frm data from the status dictionary during alter table.  it will
    // be created when the table is reopened with the new schema.
    remove_frm_data(share->status_block, NULL);
#endif
    DBUG_VOID_RETURN;
}