ha_tokudb.cc 83.8 KB
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#ifdef USE_PRAGMA_IMPLEMENTATION
#pragma implementation  // gcc: Class implementation
#endif

#define MYSQL_SERVER 1
#include "mysql_priv.h"

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

#include "tokudb_config.h"

/* 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

#include "tokudb_probes.h"

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

static handler *tdb_create_handler(handlerton *hton,
                                   TABLE_SHARE *table,
                                   MEM_ROOT *mem_root);

handlerton *tdb_hton;

typedef struct st_tokudb_trx_data {
  DB_TXN *all;
  DB_TXN *stmt;
  DB_TXN *sp_level;
  uint tdb_lock_count;
} tokudb_trx_data;

#define HA_TOKUDB_ROWS_IN_TABLE 10000 /* to get optimization right */
#define HA_TOKUDB_RANGE_COUNT   100
#define HA_TOKUDB_MAX_ROWS      10000000 /* Max rows in table */
/* extra rows for estimate_rows_upper_bound() */
#define HA_TOKUDB_EXTRA_ROWS    100

/* Bits for share->status */
#define STATUS_PRIMARY_KEY_INIT 1
#define STATUS_ROW_COUNT_INIT   2
#define STATUS_TDB_ANALYZE      4

const u_int32_t tdb_DB_TXN_NOSYNC= DB_TXN_NOSYNC;
const u_int32_t tdb_DB_RECOVER= DB_RECOVER;
const u_int32_t tdb_DB_PRIVATE= DB_PRIVATE;
// const u_int32_t tdb_DB_DIRECT_DB= DB_DIRECT_DB;
// const u_int32_t tdb_DB_DIRECT_LOG= DB_DIRECT_LOG;
const char *ha_tokudb_ext= ".tdb";

static my_bool tokudb_shared_data= FALSE;
static u_int32_t tokudb_init_flags= DB_PRIVATE | DB_RECOVER;
static u_int32_t tokudb_env_flags= DB_LOG_AUTOREMOVE;
static u_int32_t tokudb_lock_type= DB_LOCK_DEFAULT;
static ulong tokudb_log_buffer_size= 0;
static ulong tokudb_log_file_size= 0;
static ulonglong tokudb_cache_size= 0;
static char *tokudb_home;
static char *tokudb_tmpdir;
static char *tokudb_logdir;
static long tokudb_lock_scan_time= 0;
static ulong tokudb_region_size= 0;
static ulong tokudb_cache_parts= 1;
static ulong tokudb_trans_retry= 1;
static ulong tokudb_max_lock;

static DB_ENV *db_env;

static const char tokudb_hton_name[]= "TokuDB";
static const int tokudb_hton_name_length=sizeof(tokudb_hton_name)-1;

const char *tokudb_lock_names[] =
{ "DEFAULT", "OLDEST", "RANDOM", "YOUNGEST", "EXPIRE", "MAXLOCKS",
  "MAXWRITE", "MINLOCKS", "MINWRITE", 0 };
#if 0
u_int32_t tokudb_lock_types[]=
{ DB_LOCK_DEFAULT, DB_LOCK_OLDEST, DB_LOCK_RANDOM, DB_LOCK_YOUNGEST,
  DB_LOCK_EXPIRE, DB_LOCK_MAXLOCKS, DB_LOCK_MAXWRITE, DB_LOCK_MINLOCKS,
  DB_LOCK_MINWRITE };
#endif
TYPELIB tokudb_lock_typelib= {array_elements(tokudb_lock_names)-1, "",
                                tokudb_lock_names, NULL};

static void tokudb_print_error(const DB_ENV *db_env, const char *db_errpfx,
                                 const char *buffer);
static void tokudb_cleanup_log_files(void);
static TOKUDB_SHARE *get_share(const char *table_name, TABLE *table);
static int free_share(TOKUDB_SHARE *share,
                      TABLE *table,
                      uint hidden_primary_key,
                      bool mutex_is_locked);
static int write_status(DB *status_block, char *buff, uint length);
static void update_status(TOKUDB_SHARE *share, TABLE *table);
static int tokudb_end(handlerton *hton, ha_panic_function type);
static bool tokudb_flush_logs(handlerton *hton);
static bool tokudb_show_status(handlerton *hton,
                                 THD *thd,
                                 stat_print_fn *print,
                                 enum ha_stat_type);
static int tokudb_close_connection(handlerton *hton, THD *thd);
static int tokudb_commit(handlerton *hton, THD *thd, bool all);
static int tokudb_rollback(handlerton *hton, THD *thd, bool all);
static int tokudb_rollback_to_savepoint(handlerton *hton, THD* thd,
                                          void *savepoint);
static int tokudb_savepoint(handlerton *hton, THD* thd,
                              void *savepoint);
static int tokudb_release_savepoint(handlerton *hton, THD* thd,
                                      void *savepoint);
static bool tokudb_show_logs(THD *thd, stat_print_fn *stat_print);

static HASH tokudb_open_tables;
pthread_mutex_t tokudb_mutex;

static uchar* tdb_get_key(TOKUDB_SHARE *share, size_t *length,
                          my_bool not_used __attribute__((unused)))
{
  *length=share->table_name_length;
  return (uchar*) share->table_name;
}

// declare a thread specific variable
// stole this from my_thr_init.h with MontyW's advice
#ifdef USE_TLS
pthread_key(void**, tdb_thr_private);
#else
pthread_key(void*, tdb_thr_private);
#endif /* USE_TLS */

int tokudb_thr_private_create (void)
{
  if ((pthread_key_create(&tdb_thr_private, NULL)) != 0)
    return 1;
  return 0;
}

void *tokudb_thr_private_get (void)
{
  void **tmp;
  tmp= my_pthread_getspecific(void**, tdb_thr_private);
  if (tmp == NULL) return NULL;
  return *tmp;
}

void tokudb_thr_private_set (void *v)
{
  // if i alloc'ed v to store here,
  //  make SURE to set a thread cleanup function to de-alloc it
  //  because the thread may terminate unexpectedly early
  pthread_setspecific(tdb_thr_private, v);
  return;
}

static int tdb_init_func(void *p)
{
  DBUG_ENTER("tdb_init_func");

  tdb_hton= (handlerton *)p;

  if (tokudb_thr_private_create()) {
    DBUG_RETURN(TRUE);
  }

  VOID(pthread_mutex_init(&tokudb_mutex, MY_MUTEX_INIT_FAST));
  (void) hash_init(&tokudb_open_tables, system_charset_info, 32, 0, 0,
		   (hash_get_key) tdb_get_key, 0, 0);

  tdb_hton->state= SHOW_OPTION_YES;
  // tdb_hton->flags= HTON_CAN_RECREATE;  // this came from skeleton
  tdb_hton->flags= HTON_CLOSE_CURSORS_AT_COMMIT | HTON_FLUSH_AFTER_RENAME;
#ifdef DB_TYPE_TOKUDB
  tdb_hton->db_type= DB_TYPE_TOKUDB;  // obsolete?
#endif

  tdb_hton->create= tdb_create_handler;
  tdb_hton->savepoint_offset= sizeof(DB_TXN *);
  tdb_hton->close_connection= tokudb_close_connection;
  tdb_hton->savepoint_set= tokudb_savepoint;
  tdb_hton->savepoint_rollback= tokudb_rollback_to_savepoint;
  tdb_hton->savepoint_release= tokudb_release_savepoint;
  tdb_hton->commit= tokudb_commit;
  tdb_hton->rollback= tokudb_rollback;
  tdb_hton->panic= tokudb_end;
  tdb_hton->flush_logs= tokudb_flush_logs;
  tdb_hton->show_status= tokudb_show_status;

  if (!tokudb_tmpdir)
    tokudb_tmpdir= mysql_tmpdir;
  DBUG_PRINT("info", ("tokudb_tmpdir: %s", tokudb_tmpdir));
  if (!tokudb_home)
    tokudb_home= mysql_real_data_home;
  DBUG_PRINT("info", ("tokudb_home: %s", tokudb_home));

  /*
    If we don't set set_lg_bsize() we will get into trouble when
    trying to use many open BDB tables.
    If log buffer is not set, assume that the we will need 512 byte per
    open table.  This is a number that we have reached by testing.
  */
  if (!tokudb_log_buffer_size)
  {
    tokudb_log_buffer_size= max(table_cache_size*512, 32*1024);
    DBUG_PRINT("info",("computing tokudb_log_buffer_size %ld\n",
		       tokudb_log_buffer_size));
  }
  /*
    Tokudb DB require that
    tokudb_log_file_size >= tokudb_log_buffer_size*4
  */
  tokudb_log_file_size= tokudb_log_buffer_size*4;
  tokudb_log_file_size= MY_ALIGN(tokudb_log_file_size, 1024*1024L);
  tokudb_log_file_size= max(tokudb_log_file_size, 10*1024*1024L);
  DBUG_PRINT("info",("computing tokudb_log_file_size: %ld\n",
		     tokudb_log_file_size));

  if (db_env_create(&db_env, 0))
    goto error;
  db_env->set_errcall(db_env, tokudb_print_error);
224
  db_env->set_errpfx(db_env, "tokudb");
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  DBUG_PRINT("info",("tokudb_tmpdir: %s\n", tokudb_tmpdir));
  db_env->set_tmp_dir(db_env, tokudb_tmpdir);
  DBUG_PRINT("info",("mysql_data_home: %s\n", mysql_data_home));
  db_env->set_data_dir(db_env, mysql_data_home);
  DBUG_PRINT("info",("tokudb_env_flags: 0x%lx\n", tokudb_env_flags));
  db_env->set_flags(db_env, tokudb_env_flags, 1);
  if (tokudb_logdir) {
    db_env->set_lg_dir(db_env, tokudb_logdir);
    DBUG_PRINT("info",("tokudb_logdir: %s\n", tokudb_logdir));
  }

  DBUG_PRINT("info",("tokudb_cache_size: %lld\n", tokudb_cache_size));
  DBUG_PRINT("info",("tokudb_cache_parts: %ld\n", tokudb_cache_parts));
  if (tokudb_cache_size > (uint) ~0)
    db_env->set_cachesize(db_env, tokudb_cache_size / (1024*1024L*1024L),
			  tokudb_cache_size % (1024L*1024L*1024L),
			  tokudb_cache_parts);
  else
    db_env->set_cachesize(db_env, 0, tokudb_cache_size, tokudb_cache_parts);


  DBUG_PRINT("info",("tokudb_log_file_size: %ld\n", tokudb_log_file_size));
  db_env->set_lg_max(db_env, tokudb_log_file_size);
  DBUG_PRINT("info",("tokudb_log_buffer_size: %ld\n", tokudb_log_buffer_size));
  db_env->set_lg_bsize(db_env, tokudb_log_buffer_size);
  DBUG_PRINT("info",("tokudb_lock_type: 0x%lx\n", tokudb_lock_type));
  db_env->set_lk_detect(db_env, tokudb_lock_type);
  // DBUG_PRINT("info",("tokudb_region_size: %ld\n", tokudb_region_size));
  // db_env->set_lg_regionmax(db_env, tokudb_region_size);
  // set_lk_max deprecated, use set_lk_max_locks
  // if (tokudb_max_lock) {
  //  DBUG_PRINT("info",("tokudb_max_lock: %ld\n", tokudb_max_lock));
  //  db_env->set_lk_max_locks(db_env, tokudb_max_lock);
  // }

  if (db_env->open(db_env,
 		   tokudb_home,
		   tokudb_init_flags |  DB_INIT_LOCK |
		   DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_TXN |
		   DB_CREATE | DB_THREAD, 0666))
  {
    db_env->close(db_env, 0);
    db_env= 0;
    goto error;
  }

  DBUG_RETURN(FALSE);
error:
  DBUG_RETURN(TRUE);
}

static int tdb_done_func(void *p)
{
  DBUG_ENTER("tdb_done_func");
  int error= 0;

  if (tokudb_open_tables.records)
    error= 1;
  hash_free(&tokudb_open_tables);
  pthread_mutex_destroy(&tokudb_mutex);
  pthread_key_delete(tdb_thr_private);

  DBUG_RETURN(0);
}

/** @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.
*/
static TOKUDB_SHARE *get_share(const char *table_name, TABLE *table)
{
  TOKUDB_SHARE *share;
  uint length;
  char *tmp_name;

  pthread_mutex_lock(&tokudb_mutex);
  length= (uint) strlen(table_name);

  if (!(share=(TOKUDB_SHARE*) hash_search(&tokudb_open_tables,
					    (uchar*) table_name,
					    length)))
  {
    ulong *rec_per_key;
    char *tmp_name;
    DB **key_file;
    u_int32_t *key_type;
    uint keys= table->s->keys;

    if (!(share=(TOKUDB_SHARE *)
	  my_multi_malloc(MYF(MY_WME | MY_ZEROFILL),
			  &share, sizeof(*share),
			  &tmp_name, length+1,
			  &rec_per_key, keys * sizeof(ha_rows),
			  &key_file, (keys+1) * sizeof(*key_file),
			  &key_type, (keys+1) * sizeof(u_int32_t),
			  NullS)))
    {
      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);

    share->rec_per_key= rec_per_key;
    share->key_file= key_file;
    share->key_type= key_type;

    if (my_hash_insert(&tokudb_open_tables, (uchar*) share))
      goto error;
    thr_lock_init(&share->lock);
    pthread_mutex_init(&share->mutex, MY_MUTEX_INIT_FAST);
  }
  pthread_mutex_unlock(&tokudb_mutex);

  return share;

error:
  pthread_mutex_destroy(&share->mutex);
  my_free((uchar *) share, MYF(0));

  return NULL;
}

static int free_share(TOKUDB_SHARE *share,
                      TABLE *table,
                      uint hidden_primary_key,
                      bool mutex_is_locked)
{
  int error, result= 0;
  uint keys= table->s->keys + test(hidden_primary_key);

  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));
    DB **key_file= share->key_file;

    /* this does share->file->close() implicitly */
    update_status(share, table);

    for (uint i=0; i < keys; i++)
    {
      if (key_file[i] && (error=key_file[i]->close(key_file[i],0)))
	result= error;
    }

    if (share->status_block &&
	(error= share->status_block->close(share->status_block,0)))
      result= error;

    hash_delete(&tokudb_open_tables, (uchar*) share);
    thr_lock_delete(&share->lock);
    pthread_mutex_destroy(&share->mutex);
    my_free((uchar *) share, MYF(0));
  }
  pthread_mutex_unlock(&tokudb_mutex);

  return result;
}

static handler* tdb_create_handler(handlerton *hton,
                                   TABLE_SHARE *table,
                                   MEM_ROOT *mem_root)
{
  return new (mem_root) ha_tokudb(hton, table);
}

int tokudb_end(handlerton *hton, ha_panic_function type)
{
  DBUG_ENTER("tokudb_end");
  int error= 0;
  if (db_env)
  {
    tokudb_cleanup_log_files();
    error= db_env->close(db_env,0);  // Error is logged
    db_env= 0;
#if 0 /* shutdown crash */
    hash_free(&tokudb_open_tables);
    pthread_mutex_destroy(&tokudb_mutex);
#endif
  }
  DBUG_RETURN(error);
}

static int tokudb_close_connection(handlerton *hton, THD *thd)
{
  my_free((void *)thd->ha_data[hton->slot], MYF(0));
  return 0;
}

bool tokudb_flush_logs(handlerton *hton)
{
  DBUG_ENTER("tokudb_flush_logs");
  int error;
  bool result= 0;
  if ((error=db_env->log_flush(db_env,0)))
  {
    my_error(ER_ERROR_DURING_FLUSH_LOGS,MYF(0),error);
    result= 1;
  }
  if ((error=db_env->txn_checkpoint(db_env,0,0,0)))
  {
    my_error(ER_ERROR_DURING_CHECKPOINT,MYF(0),error);
    result= 1;
  }
  DBUG_RETURN(result);
}

static int tokudb_commit(handlerton *hton, THD *thd, bool all)
{
  DBUG_ENTER("tokudb_commit");
  DBUG_PRINT("trans",("ending transaction %s", all ? "all" : "stmt"));
  tokudb_trx_data *trx=(tokudb_trx_data *)thd->ha_data[hton->slot];
  DB_TXN **txn= all ? &trx->all : &trx->stmt;
  int error= (*txn)->commit(*txn,0);
  *txn=0;
  DBUG_RETURN(error);
}

static int tokudb_rollback(handlerton *hton, THD *thd, bool all)
{
  DBUG_ENTER("tokudb_rollback");
  DBUG_PRINT("trans",("aborting transaction %s", all ? "all" : "stmt"));
  tokudb_trx_data *trx=(tokudb_trx_data *)thd->ha_data[hton->slot];
  DB_TXN **txn= all ? &trx->all : &trx->stmt;
  int error= (*txn)->abort(*txn);
  *txn=0;
  DBUG_RETURN(error);
}

static int tokudb_savepoint(handlerton *hton, THD* thd,
			      void *savepoint)
{
  DBUG_ENTER("tokudb_savepoint");
  int error;
  DB_TXN **save_txn= (DB_TXN**) savepoint;
  tokudb_trx_data *trx=(tokudb_trx_data *)thd->ha_data[hton->slot];
  if (!(error= db_env->txn_begin(db_env, trx->sp_level, save_txn, 0)))
  {
    trx->sp_level= *save_txn;
  }
  DBUG_RETURN(error);
}

static int tokudb_rollback_to_savepoint(handlerton *hton,
					  THD* thd,
					  void *savepoint)
{
  DBUG_ENTER("tokudb_rollback_to_savepoint");
#if 0
  int error;
  DB_TXN *parent, **save_txn= (DB_TXN**) savepoint;
  tokudb_trx_data *trx=(tokudb_trx_data *)thd->ha_data[hton->slot];
  parent= (*save_txn)->parent;
  if (!(error= (*save_txn)->abort(*save_txn)))
  {
    trx->sp_level= parent;
    error= tokudb_savepoint(hton, thd, savepoint);
  }
#else
  int error = EINVAL;
#endif
  DBUG_RETURN(error);
}

static int tokudb_release_savepoint(handlerton *hton, THD* thd, void *savepoint)
{
  DBUG_ENTER("tokudb_release_savepoint");
#if 0
  int error;
  DB_TXN *parent, **save_txn= (DB_TXN**) savepoint;
  tokudb_trx_data *trx=(tokudb_trx_data *)thd->ha_data[hton->slot];
  parent= (*save_txn)->parent;
  if (!(error= (*save_txn)->commit(*save_txn,0)))
  {
    trx->sp_level= parent;
    *save_txn= 0;
  }
#else
  int error = EINVAL;
#endif
  DBUG_RETURN(error);
}

static bool tokudb_show_logs(THD *thd, stat_print_fn *stat_print)
{
  DBUG_ENTER("tokudb_show_logs");
  char **all_logs, **free_logs, **a, **f;
  int error=1;
  MEM_ROOT **root_ptr= my_pthread_getspecific_ptr(MEM_ROOT**,THR_MALLOC);
  MEM_ROOT show_logs_root, *old_mem_root= *root_ptr;

  init_sql_alloc(&show_logs_root, BDB_LOG_ALLOC_BLOCK_SIZE,
		 BDB_LOG_ALLOC_BLOCK_SIZE);
  *root_ptr= &show_logs_root;
  all_logs= free_logs= 0;

  if ((error= db_env->log_archive(db_env, &all_logs,
				  DB_ARCH_ABS | DB_ARCH_LOG)) ||
      (error= db_env->log_archive(db_env, &free_logs, DB_ARCH_ABS)))
  {
    DBUG_PRINT("error", ("log_archive failed (error %d)", error));
    db_env->err(db_env, error, "log_archive: DB_ARCH_ABS");
    if (error== DB_NOTFOUND)
      error=0;  // No log files
    goto err;
  }
  /* Error is 0 here */
  if (all_logs)
  {
    for (a = all_logs, f = free_logs; *a; ++a)
    {
      if (f && *f && strcmp(*a, *f) == 0)
      {
	f++;
	if ((error= stat_print(thd, tokudb_hton_name,
			       tokudb_hton_name_length, *a, strlen(*a),
			       STRING_WITH_LEN(SHOW_LOG_STATUS_FREE))))
	  break;
      }
      else
      {
	if ((error= stat_print(thd, tokudb_hton_name,
			       tokudb_hton_name_length, *a, strlen(*a),
			       STRING_WITH_LEN(SHOW_LOG_STATUS_INUSE))))
	  break;
      }
    }
  }
err:
  if (all_logs)
    free(all_logs);
  if (free_logs)
    free(free_logs);
  free_root(&show_logs_root,MYF(0));
  *root_ptr= old_mem_root;
  DBUG_RETURN(error);
}

bool tokudb_show_status(handlerton *hton,
			  THD *thd,
			  stat_print_fn *stat_print,
                          enum ha_stat_type stat_type)
{
  switch (stat_type) {
  case HA_ENGINE_LOGS:
    return tokudb_show_logs(thd, stat_print);
  default:
    return FALSE;
  }
}

static void tokudb_print_error(const DB_ENV *db_env, const char *db_errpfx,
                                 const char *buffer)
{
  sql_print_error("%s:  %s", db_errpfx, buffer);
}

void tokudb_cleanup_log_files(void)
{
  DBUG_ENTER("tokudb_cleanup_log_files");
  char **names;
  int error;

  // by HF. Sometimes it crashes. TODO - find out why
#ifndef EMBEDDED_LIBRARY
  /* XXX: Probably this should be done somewhere else, and
   * should be tunable by the user. */
  if ((error = db_env->txn_checkpoint(db_env, 0, 0, 0)))
    my_error(ER_ERROR_DURING_CHECKPOINT, MYF(0), error);
#endif
  if ((error = db_env->log_archive(db_env, &names, DB_ARCH_ABS)) != 0)
  {
    DBUG_PRINT("error", ("log_archive failed (error %d)", error));
    db_env->err(db_env, error, "log_archive: DB_ARCH_ABS");
    DBUG_VOID_RETURN;
  }

  if (names)
  {                                           
    char **np;                                
    for (np = names; *np; ++np)               
      my_delete(*np, MYF(MY_WME));            

    free(names);
  }

  DBUG_VOID_RETURN;
}

ha_tokudb::ha_tokudb(handlerton *hton, TABLE_SHARE *table_arg)
  :handler(hton, table_arg), alloc_ptr(0), rec_buff(0), file(0),
   int_table_flags(HA_REC_NOT_IN_SEQ | HA_FAST_KEY_READ |
		   HA_NULL_IN_KEY | HA_CAN_INDEX_BLOBS |
		   HA_PRIMARY_KEY_IN_READ_INDEX | HA_FILE_BASED |
		   HA_CAN_GEOMETRY |
		   HA_AUTO_PART_KEY | HA_TABLE_SCAN_ON_INDEX),
   changed_rows(0), last_dup_key((uint) -1), version(0), using_ignore(0)
{}

static const char *ha_tokudb_exts[]= {
  ha_tokudb_ext,
  NullS
};

const char **ha_tokudb::bas_ext() const
{
  return ha_tokudb_exts;
}

ulong ha_tokudb::index_flags(uint idx, uint part, bool all_parts) const
{
  ulong flags= (HA_READ_NEXT | HA_READ_PREV | HA_READ_ORDER | HA_KEYREAD_ONLY
		| HA_READ_RANGE);
  for (uint i= all_parts ? 0 : part; i <= part; i++)
  {
    KEY_PART_INFO *key_part= table_share->key_info[idx].key_part+i;
    if (key_part->field->type() == FIELD_TYPE_BLOB)
    {
      /* We can't use BLOBS to shortcut sorts */
      flags&= ~(HA_READ_ORDER | HA_KEYREAD_ONLY | HA_READ_RANGE);
      break;
    }
    switch (key_part->field->key_type()) {
    case HA_KEYTYPE_TEXT:
    case HA_KEYTYPE_VARTEXT1:
    case HA_KEYTYPE_VARTEXT2:
      /*
	As BDB stores only one copy of equal strings, we can't use key read
	on these. Binary collations do support key read though.
      */
      if (!(key_part->field->charset()->state & MY_CS_BINSORT))
	flags&= ~HA_KEYREAD_ONLY;
      break;
    default:  // Keep compiler happy
      break;
    }
  }
  return flags;
}

static int
tokudb_cmp_hidden_key(DB* file, const DBT *new_key, const DBT *saved_key)
{
  ulonglong a=uint5korr((char*) new_key->data);
  ulonglong b=uint5korr((char*) saved_key->data);
  return  a < b ? -1 : (a > b ? 1 : 0);
}

static int
tokudb_cmp_packed_key(DB *file, const DBT *new_key, const DBT *saved_key)
{
  assert(file->app_private != 0);
  KEY *key= (KEY*) file->app_private;
  uchar *new_key_ptr= (uchar*) new_key->data;
  uchar *saved_key_ptr= (uchar*) saved_key->data;
  KEY_PART_INFO *key_part= key->key_part, *end=key_part+key->key_parts;
  uint key_length= new_key->size;

  //DBUG_DUMP("key_in_index", saved_key_ptr, saved_key->size);
  for (; key_part != end && (int) key_length > 0; key_part++)
  {
    int cmp;
    uint length;
    if (key_part->null_bit)
    {
      if (*new_key_ptr != *saved_key_ptr++)
	return ((int) *new_key_ptr - (int) saved_key_ptr[-1]);
      key_length--;
      if (!*new_key_ptr++)
	continue;
    }
704
    if (0) printf("%s:%d:insert_or_update=%d\n", __FILE__, __LINE__, key->table->insert_or_update);
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    if ((cmp= key_part->field->pack_cmp(new_key_ptr,saved_key_ptr,
					key_part->length,
					key->table->insert_or_update)))
      return cmp;
    length= key_part->field->packed_col_length(new_key_ptr,
					       key_part->length);
    new_key_ptr+=length;
    key_length-=length;
    saved_key_ptr+=key_part->field->packed_col_length(saved_key_ptr,
						      key_part->length);
  }
  return key->handler.bdb_return_if_eq;
}

/* Compare key against row */
static bool
tokudb_key_cmp(TABLE *table, KEY *key_info, const uchar *key, uint key_length)
{
  KEY_PART_INFO *key_part= key_info->key_part,
    *end=key_part+key_info->key_parts;

  for (; key_part != end && (int) key_length > 0; key_part++)
  {
    int cmp;
    uint length;
    if (key_part->null_bit)
    {
      key_length--;
      /*
	With the current usage, the following case will always be FALSE,
	because NULL keys are sorted before any other key
      */
      if (*key != (table->record[0][key_part->null_offset] &
		   key_part->null_bit) ? 0 : 1)
	return 1;
      if (!*key++)  // Null value
	continue;
    }
    /*
      Last argument has to be 0 as we are also using this to function to see
      if a key like 'a  ' matched a row with 'a'
    */
    if ((cmp= key_part->field->pack_cmp(key, key_part->length, 0)))
      return cmp;
    length= key_part->field->packed_col_length(key,key_part->length);
    key+= length;
    key_length-= length;
  }
  return 0;  // Identical keys
}

int ha_tokudb::open(const char *name, int mode, uint test_if_locked)
{
  DBUG_ENTER("ha_tokudb::open");
  TOKUDB_OPEN();

  char name_buff[FN_REFLEN];
  uint open_mode=(mode == O_RDONLY ? DB_RDONLY : 0) | DB_THREAD;
  uint max_key_length;
  int error;

  /* 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;
    ref_length= hidden_primary_key= TDB_HIDDEN_PRIMARY_KEY_LENGTH;
  }
  else
    key_used_on_scan= primary_key;

  /* Need some extra memory in case of packed keys */
  max_key_length= table_share->max_key_length + MAX_REF_PARTS*3;
  if (!(alloc_ptr=
	my_multi_malloc(MYF(MY_WME),
			&key_buff,  max_key_length,
			&key_buff2, max_key_length,
			&primary_key_buff,
			(hidden_primary_key ? 0 :
			 table_share->key_info[table_share->primary_key].key_length),
			NullS)))
    DBUG_RETURN(1);
  if (!(rec_buff= (uchar*) my_malloc((alloced_rec_buff_length=
				      table_share->rec_buff_length),
				     MYF(MY_WME))))
  {
    my_free(alloc_ptr,MYF(0));
    DBUG_RETURN(1);
  }

  /* Init shared structure */
  if (!(share= get_share(name,table)))
  {
    my_free((char*) rec_buff,MYF(0));
    my_free(alloc_ptr,MYF(0));
    DBUG_RETURN(1);
  }
  thr_lock_data_init(&share->lock, &lock, NULL);
  key_file = share->key_file;
  key_type = share->key_type;
  bzero((void*) &current_row, sizeof(current_row));

  /* Fill in shared structure, if needed */
  pthread_mutex_lock(&share->mutex);
  file= share->file;
  printf("%s:%d:bdbopen:%p:share=%p:file=%p:table=%p:table->s=%p:%d\n", __FILE__, __LINE__, 
         this, share, share->file, table, table->s, share->use_count);
  if (!share->use_count++)
  {
    DBUG_PRINT("info",("share->use_count %u", share->use_count));

    if ((error=db_create(&file, db_env, 0)))
    {
      free_share(share,table, hidden_primary_key,1);
      my_free((char*) rec_buff,MYF(0));
      my_free(alloc_ptr,MYF(0));
      my_errno=error;
      DBUG_RETURN(1);
    }
    share->file= file;

    file->set_bt_compare(file,
			 (hidden_primary_key ? tokudb_cmp_hidden_key :
			  tokudb_cmp_packed_key));
    if (!hidden_primary_key)
      file->app_private= (void*) (table->key_info + table_share->primary_key);
833
    char newname[strlen(name) + 32];
834
    sprintf(newname, "%s%s/main", name, ha_tokudb_ext);
835
    fn_format(name_buff, newname, "", ha_tokudb_ext, MY_UNPACK_FILENAME|MY_APPEND_EXT);
836
    if ((error= db_env->txn_begin(db_env, NULL, (DB_TXN**) &transaction, 0)) ||
837
	(error= (file->open(file, transaction, name_buff,
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			    "main", DB_BTREE, open_mode, 0))) ||
	(error= transaction->commit(transaction, 0)))
    {
      free_share(share, table, hidden_primary_key,1);
      my_free((char*) rec_buff,MYF(0));
      my_free(alloc_ptr,MYF(0));
      my_errno=error;
      DBUG_RETURN(1);
    }

    /* Open other keys;  These are part of the share structure */
    key_file[primary_key]= file;
    key_type[primary_key]= hidden_primary_key ? 0 : DB_NOOVERWRITE;

    DB **ptr=key_file;
    for (uint i=0, used_keys=0; i < table_share->keys; i++, ptr++)
    {
      char part[7];
      if (i != primary_key)
      {
	if ((error=db_create(ptr, db_env, 0)))
	{
860
	  __close(1);
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	  my_errno=error;
	  DBUG_RETURN(1);
	}
	sprintf(part,"key%02d",++used_keys);
865
        sprintf(newname, "%s%s/%s", name, ha_tokudb_ext, part);
866
        fn_format(name_buff, newname, "", ha_tokudb_ext, MY_UNPACK_FILENAME|MY_APPEND_EXT);
867
	key_type[i]=table->key_info[i].flags & HA_NOSAME ? DB_NOOVERWRITE : DB_YESOVERWRITE;
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	(*ptr)->set_bt_compare(*ptr, tokudb_cmp_packed_key);
	(*ptr)->app_private= (void*) (table->key_info+i);
	if (!(table->key_info[i].flags & HA_NOSAME))
	{
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	  DBUG_PRINT("info",("Setting DB_DUP+DB_DUPSORT for key %u", i));
	  (*ptr)->set_flags(*ptr, DB_DUP+DB_DUPSORT);
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	}
	if ((error= db_env->txn_begin(db_env, NULL, (DB_TXN**) &transaction,
				      0)) ||
	    (error=((*ptr)->open(*ptr, transaction, name_buff, part, DB_BTREE,
				 open_mode, 0))) ||
	    (error= transaction->commit(transaction, 0)))
	{
881
	  __close(1);
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	  my_errno=error;
	  DBUG_RETURN(1);
	}
      }
    }
    /* Calculate pack_length of primary key */
    share->fixed_length_primary_key= 1;
    if (!hidden_primary_key)
    {
      ref_length=0;
      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->fixed_length_primary_key=
	(ref_length == table->key_info[primary_key].key_length);
      share->status|= STATUS_PRIMARY_KEY_INIT;
    }
    share->ref_length= ref_length;
  }
  ref_length= share->ref_length;  // If second open
  pthread_mutex_unlock(&share->mutex);

  transaction=0;
  cursor=0;
  key_read=0;
  stats.block_size=8192;  // Tokudb DB block size
  share->fixed_length_row= !(table_share->db_create_options &
			     HA_OPTION_PACK_RECORD);

  get_status();
  info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST);

  DBUG_RETURN(0);
}

int ha_tokudb::close(void)
{
  DBUG_ENTER("ha_tokudb::close");
  TOKUDB_CLOSE();
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  DBUG_RETURN(__close(0));
}

int ha_tokudb::__close(int mutex_is_locked)
{
  DBUG_ENTER("ha_tokudb::__close");
928 929 930 931 932 933 934 935
  printf("%s:%d:close:%p\n", __FILE__, __LINE__, this);
  if (file->app_private == table->key_info + table_share->primary_key) {
      printf("%s:%d:reset app_private\n", __FILE__, __LINE__);
      file->app_private = 0;
  }
  my_free(rec_buff,MYF(MY_ALLOW_ZERO_PTR));
  my_free(alloc_ptr,MYF(MY_ALLOW_ZERO_PTR));
  ha_tokudb::reset();  // current_row buffer
936
  DBUG_RETURN(free_share(share, table, hidden_primary_key, mutex_is_locked));
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}

/* Reallocate buffer if needed */
bool ha_tokudb::fix_rec_buff_for_blob(ulong length)
{
  if (! rec_buff || length > alloced_rec_buff_length)
  {
    uchar *newptr;
    if (!(newptr=(uchar*) my_realloc((void *) rec_buff, length,
				     MYF(MY_ALLOW_ZERO_PTR))))
      return 1;
    rec_buff=newptr;
    alloced_rec_buff_length=length;
  }
  return 0;
}

/* Calculate max length needed for row */
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]);
    length += blob->get_length((uchar *)(buf + blob->offset((uchar *)buf)))+2;
  }
  return length;
}

/*
  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.
*/

int ha_tokudb::pack_row(DBT *row, const uchar *record, bool new_row)
{
  uchar *ptr;
  bzero((void*) row, sizeof(*row));
  if (share->fixed_length_row)
  {
    row->data=(void*) record;
    row->size= table_share->reclength+hidden_primary_key;
    if (hidden_primary_key)
    {
      if (new_row)
	get_auto_primary_key(current_ident);
      memcpy_fixed((char*) record+table_share->reclength,
		   (char*) current_ident,
		   TDB_HIDDEN_PRIMARY_KEY_LENGTH);
    }
    return 0;
  }
  if (table_share->blob_fields)
  {
    if (fix_rec_buff_for_blob(max_row_length(record)))
      return HA_ERR_OUT_OF_MEM;
  }

  /* Copy null bits */
  memcpy(rec_buff, record, table_share->null_bytes);
  ptr= rec_buff + table_share->null_bytes;

  for (Field **field=table->field; *field; field++)
    ptr= (*field)->pack(ptr,
			(const uchar *)
			(record
			 + (*field)->offset((uchar *)record)));

  if (hidden_primary_key)
  {
    if (new_row)
      get_auto_primary_key(current_ident);
    memcpy_fixed((char*) ptr, (char*) current_ident,
		 TDB_HIDDEN_PRIMARY_KEY_LENGTH);
    ptr+=TDB_HIDDEN_PRIMARY_KEY_LENGTH;
  }
  row->data=rec_buff;
  row->size= (size_t) (ptr - rec_buff);
  return 0;
}

void ha_tokudb::unpack_row(uchar *record, DBT *row)
{
  if (share->fixed_length_row)
    memcpy(record, (void*) row->data,
	   table_share->reclength+hidden_primary_key);
  else
  {
    /* Copy null bits */
    my_bitmap_map *old_map= dbug_tmp_use_all_columns(table, table->write_set);
    const uchar *ptr= (const uchar *)row->data;
    memcpy(record, ptr, table_share->null_bytes);
    ptr+= table_share->null_bytes;
    for (Field **field=table->field; *field; field++)
      ptr= (*field)->unpack(record + (*field)->offset(record), ptr);
    dbug_tmp_restore_column_map(table->write_set, old_map);
  }
}

/* Store the key and the primary key into the row */
void ha_tokudb::unpack_key(uchar *record, DBT *key, uint index)
{
  KEY *key_info= table->key_info+index;
  KEY_PART_INFO *key_part= key_info->key_part,
    *end= key_part+key_info->key_parts;
  uchar *pos= (uchar*) key->data;

  for (; key_part != end; key_part++)
  {
    if (key_part->null_bit)
    {
      if (!*pos++)  // Null value
      {
	/*
	  We don't need to reset the record data as we will not access it
	  if the null data is set
	*/

	record[key_part->null_offset] |= key_part->null_bit;
	continue;
      }
      record[key_part->null_offset] &= ~key_part->null_bit;
    }
    pos= (uchar*) key_part->field->unpack_key(record + key_part->field->offset(record),
					      pos,
#if MYSQL_VERSION_ID <= 60003
                                              key_part->length);
#else
					      key_part->length,
					      table->s->db_low_byte_first);
#endif
  }
}

/*
  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.
*/

DBT *ha_tokudb::create_key(DBT *key, uint keynr, uchar *buff,
                             const uchar *record, int key_length)
{
  DBUG_ENTER("ha_tokudb::create_key");
  bzero((void*) key, sizeof(*key));
  if (hidden_primary_key && keynr == primary_key)
  {
    key->data= current_ident;
    key->size= TDB_HIDDEN_PRIMARY_KEY_LENGTH;
1094
    DBUG_RETURN(key);
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  }

  KEY *key_info= table->key_info+keynr;
  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);

  key->data= buff;
  // DBTs dont have app_private members anymore, that was a MySQL hack
  // instead it seems to be called app_data
  // key->app_private= (void*) key_info;
  // key->app_data= (void*) key_info;
  for (; key_part != end && key_length > 0; key_part++)
  {
    if (key_part->null_bit)
    {
      /* Store 0 if the key part is a NULL part */
      if (record[key_part->null_offset] & key_part->null_bit)
      {
	*buff++ =0;
	key->flags|=DB_DBT_DUPOK;
	continue;
      }
      *buff++ = 1;  // Store NOT NULL marker
    }
    buff=key_part->field->pack_key(buff,
				   (uchar*) (record + key_part->offset),
#if MYSQL_VERSION_ID <= 60003
                                   key_part->length);
#else
				   key_part->length,
				   table->s->db_low_byte_first);
#endif
    key_length -= key_part->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);
}


/*
  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
*/

DBT *ha_tokudb::pack_key(DBT *key, uint keynr, uchar *buff,
                           const uchar *key_ptr, uint key_length)
{
  DBUG_ENTER("ha_tokudb::pack_key");
  KEY *key_info= table->key_info+keynr;
  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;
  // DBTs dont have app_private members anymore, that was a MySQL hack
  // instead it seems to be called app_data
  // key->app_private= (void*) key_info;
  // key->app_data= (void*) key_info;

  for (; key_part != end && (int)key_length > 0; key_part++)
  {
    uint offset=0;
    if (key_part->null_bit)
    {
      if (!(*buff++ = (*key_ptr == 0)))  // Store 0 if NULL
      {
	key_length -= key_part->store_length;
	key_ptr += key_part->store_length;
	key->flags |= DB_DBT_DUPOK;
	continue;
      }
      offset= 1;  // Data is at key_ptr+1
    }
    buff= key_part->field->pack_key_from_key_image(buff,
						   (uchar*) key_ptr+offset,
#if MYSQL_VERSION_ID <= 60003
                                                   key_part->length);
#else
						   key_part->length,
						   table->s->db_low_byte_first);
#endif
    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);
}

/** @brief
    Get status information that is stored in the 'status' sub database
    and the max used value for the hidden primary key.
*/
void ha_tokudb::get_status()
{
  if (!test_all_bits(share->status, (STATUS_PRIMARY_KEY_INIT |
				     STATUS_ROW_COUNT_INIT)))
  {
    pthread_mutex_lock(&share->mutex);
    if (!(share->status & STATUS_PRIMARY_KEY_INIT))
    {
      (void) extra(HA_EXTRA_KEYREAD);
      index_init(primary_key, 0);
      if (!index_last(table->record[1]))
	share->auto_ident= uint5korr(current_ident);
      index_end();
      (void) extra(HA_EXTRA_NO_KEYREAD);
    }
    if (! share->status_block)
    {
      char name_buff[FN_REFLEN];
1213
      char newname[strlen(share->table_name) + 32];
1214
      sprintf(newname, "%s%s/status", share->table_name, ha_tokudb_ext);
1215 1216
      uint open_mode= (((table->db_stat & HA_READ_ONLY) ? DB_RDONLY : 0)
		       | DB_THREAD);
1217
      fn_format(name_buff, newname, "", ha_tokudb_ext,
1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294
		MY_UNPACK_FILENAME|MY_APPEND_EXT);
      if (!db_create(&share->status_block, db_env, 0))
      {
	if (share->status_block->open(share->status_block, NULL, name_buff,
				      "status", DB_BTREE, open_mode, 0))
	{
	  share->status_block->close(share->status_block, 0);
	  share->status_block= 0;
	}
      }
    }
    if (!(share->status & STATUS_ROW_COUNT_INIT) && share->status_block)
    {
      share->org_rows= share->rows=
	table_share->max_rows ? table_share->max_rows : HA_TOKUDB_MAX_ROWS;
      if (!share->status_block->cursor(share->status_block, 0, &cursor, 0))
      {
	DBT row;
	char rec_buff[64];
	bzero((void*) &row, sizeof(row));
	bzero((void*) &last_key, sizeof(last_key));
	row.data= rec_buff;
	row.ulen= sizeof(rec_buff);
	row.flags= DB_DBT_USERMEM;
	if (!cursor->c_get(cursor, &last_key, &row, DB_FIRST))
	{
	  uint i;
	  uchar *pos= (uchar*)row.data;
	  share->org_rows= share->rows= uint4korr(pos);
	  pos += 4;
	  for (i=0; i < table_share->keys; i++)
	  {
	    share->rec_per_key[i]= uint4korr(pos);
	    pos += 4;
	  }
	}
	cursor->c_close(cursor);
      }
      cursor= 0;
    }
    share->status |= STATUS_PRIMARY_KEY_INIT | STATUS_ROW_COUNT_INIT;
    pthread_mutex_unlock(&share->mutex);
  }
}

static int write_status(DB *status_block, char *buff, uint length)
{
  DBUG_ENTER("write_status");
  DBT row, key;
  int error;
  const char *key_buff= "status";

  bzero((void*) &row, sizeof(row));
  bzero((void*) &key, sizeof(key));
  row.data= buff;
  key.data= (void*) key_buff;
  key.size= sizeof(key_buff);
  row.size= length;
  error= status_block->put(status_block, 0, &key, &row, 0);
  DBUG_RETURN(error);
}

static void update_status(TOKUDB_SHARE *share, TABLE *table)
{
  DBUG_ENTER("update_status");
  if (share->rows != share->org_rows ||
      (share->status & STATUS_TDB_ANALYZE))
  {
    pthread_mutex_lock(&share->mutex);
    if (!share->status_block)
    {
      /*
	Create sub database 'status' if it doesn't exist from before
	(This '*should*' always exist for table created with MySQL)
      */

      char name_buff[FN_REFLEN];
1295
      char newname[strlen(share->table_name) + 32];
1296 1297
      sprintf(newname, "%s%s/status", share->table_name, ha_tokudb_ext);
      fn_format(name_buff, newname, "", ha_tokudb_ext, MY_UNPACK_FILENAME|MY_APPEND_EXT);
1298 1299 1300
      if (db_create(&share->status_block, db_env, 0))
	goto end;
      share->status_block->set_flags(share->status_block, 0);
1301
      if (share->status_block->open(share->status_block, NULL, name_buff, 
1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 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 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415
				    "status", DB_BTREE,
				    DB_THREAD | DB_CREATE, my_umask))
	goto end;
    }
    {
      char rec_buff[4+MAX_KEY*4], *pos= rec_buff;
      int4store(pos,share->rows); pos += 4;
      for (uint i=0; i < table->s->keys; i++)
      {
	int4store(pos,share->rec_per_key[i]); pos+=4;
      }
      DBUG_PRINT("info",("updating status for %s", share->table_name));
      (void) write_status(share->status_block, rec_buff,
			  (uint) (pos-rec_buff));
      share->status&= ~STATUS_TDB_ANALYZE;
      share->org_rows=share->rows;
    }
  end:
    pthread_mutex_unlock(&share->mutex);
  }
  DBUG_VOID_RETURN;
}

/** @brief
    Return an estimated of the number of rows in the table.
    Used when sorting to allocate buffers and by the optimizer.
*/
ha_rows ha_tokudb::estimate_rows_upper_bound()
{
  return share->rows + HA_TOKUDB_EXTRA_ROWS;
}

int ha_tokudb::cmp_ref(const uchar *ref1, const uchar *ref2)
{
  if (hidden_primary_key)
    return memcmp(ref1, ref2, TDB_HIDDEN_PRIMARY_KEY_LENGTH);

  int result;
  Field *field;
  KEY *key_info= table->key_info+table_share->primary_key;
  KEY_PART_INFO *key_part= key_info->key_part;
  KEY_PART_INFO *end= key_part+key_info->key_parts;

  for (; key_part != end; key_part++)
  {
    field= key_part->field;
    result= field->pack_cmp((const uchar*)ref1, (const uchar*)ref2,
			    key_part->length, 0);
    if (result)
      return result;
    ref1+= field->packed_col_length((const uchar*)ref1, key_part->length);
    ref2+= field->packed_col_length((const uchar*)ref2, key_part->length);
  }

  return 0;
}

bool ha_tokudb::check_if_incompatible_data(HA_CREATE_INFO *info,
                                             uint table_changes)
{
  if (table_changes < IS_EQUAL_YES)
    return COMPATIBLE_DATA_NO;
  return COMPATIBLE_DATA_YES;
}

int ha_tokudb::write_row(uchar *record)
{
  DBUG_ENTER("write_row");
  DBT row, prim_key, key;
  int error;

  statistic_increment(table->in_use->status_var.ha_write_count, &LOCK_status);
  if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_INSERT)
    table->timestamp_field->set_time();
  if (table->next_number_field && record == table->record[0])
    update_auto_increment();
  if ((error=pack_row(&row, (const uchar*) record, 1)))
    DBUG_RETURN(error);

  table->insert_or_update= 1;  // For handling of VARCHAR
  if (table_share->keys + test(hidden_primary_key) == 1)
  {
    error=file->put(file, transaction, create_key(&prim_key, primary_key,
						  key_buff, record),
		    &row, key_type[primary_key]);
    last_dup_key=primary_key;
  }
  else
  {
    DB_TXN *sub_trans = transaction;
    /* Don't use sub transactions in temporary tables */
    for (uint retry=0; retry < tokudb_trans_retry; retry++)
    {
      key_map changed_keys(0);
      if (!(error=file->put(file, sub_trans, create_key(&prim_key, primary_key,
							key_buff, record),
			    &row, key_type[primary_key])))
      {
	changed_keys.set_bit(primary_key);
	for (uint keynr=0; keynr < table_share->keys; keynr++)
	{
	  if (keynr == primary_key)
	    continue;
	  if ((error=key_file[keynr]->put(key_file[keynr], sub_trans,
					  create_key(&key, keynr, key_buff2,
						     record),
					  &prim_key, key_type[keynr])))
	  {
	    last_dup_key=keynr;
	    break;
	  }
	  changed_keys.set_bit(keynr);
	}
      }
      else
	last_dup_key=primary_key;
      if (error)
      {
	/* Remove inserted row */
	DBUG_PRINT("error",("Got error %d",error));
	if (using_ignore)
	{
	  int new_error = 0;
	  if (!changed_keys.is_clear_all())
	  {
	    new_error = 0;
	    for (uint keynr=0;
		 keynr < table_share->keys+test(hidden_primary_key);
		 keynr++)
	    {
	      if (changed_keys.is_set(keynr))
	      {
		if ((new_error = remove_key(sub_trans, keynr, record,
					    &prim_key)))
		  break;
	      }
	    }
	  }
	  if (new_error)
	  {
	    error=new_error;  // This shouldn't happen
	    break;
	  }
	}
      }
      if (error != DB_LOCK_DEADLOCK)
	break;
    }
  }
  table->insert_or_update= 0;
  if (error == DB_KEYEXIST)
    error=HA_ERR_FOUND_DUPP_KEY;
  else if (!error)
    changed_rows++;
  DBUG_RETURN(error);
}

/* Compare if a key in a row has changed */
int ha_tokudb::key_cmp(uint keynr,
                         const uchar *old_row,
                         const uchar *new_row)
{
  KEY_PART_INFO *key_part=table->key_info[keynr].key_part;
  KEY_PART_INFO *end=key_part+table->key_info[keynr].key_parts;

  for (; key_part != end; key_part++)
  {
    if (key_part->null_bit)
    {
      if ((old_row[key_part->null_offset] & key_part->null_bit) !=
	  (new_row[key_part->null_offset] & key_part->null_bit))
	return 1;
    }
    if (key_part->key_part_flag & (HA_BLOB_PART | HA_VAR_LENGTH_PART))
    {

      if (key_part->field->cmp_binary((uchar*) (old_row + key_part->offset),
				      (uchar*) (new_row + key_part->offset),
				      (ulong) key_part->length))
	return 1;
    }
    else
    {
      if (memcmp(old_row+key_part->offset, new_row+key_part->offset,
		 key_part->length))
	return 1;
    }
  }
  return 0;
}


/*
  Update a row from one value to another.
  Clobbers key_buff2
*/
int ha_tokudb::update_primary_key(DB_TXN *trans, bool primary_key_changed,
                                    const uchar *old_row, DBT *old_key,
                                    const uchar *new_row, DBT *new_key,
                                    bool local_using_ignore)
{
  DBUG_ENTER("update_primary_key");
  DBT row;
  int error;

  if (primary_key_changed)
  {
    // Primary key changed or we are updating a key that can have duplicates.
    // Delete the old row and add a new one
    if (!(error=remove_key(trans, primary_key, old_row, old_key)))
    {
      if (!(error=pack_row(&row, new_row, 0)))
      {
	if ((error=file->put(file, trans, new_key, &row,
			     key_type[primary_key])))
	{
	  // Probably a duplicated key; restore old key and row if needed
	  last_dup_key= primary_key;
	  if (local_using_ignore)
	  {
	    int new_error;
	    if ((new_error=pack_row(&row, old_row, 0)) ||
		(new_error=file->put(file, trans, old_key, &row,
				     key_type[primary_key])))
	      error=new_error;  // fatal error
	  }
	}
      }
    }
  }
  else
  {
    // Primary key didn't change;  just update the row data
    if (!(error=pack_row(&row, new_row, 0)))
      error=file->put(file, trans, new_key, &row, 0);
  }
  DBUG_RETURN(error);
}

/*
  Restore changed keys, when a non-fatal error aborts the insert/update
  of one row.
  Clobbers keybuff2
*/
int ha_tokudb::restore_keys(DB_TXN *trans, key_map *changed_keys,
                              uint primary_key,
                              const uchar *old_row, DBT *old_key,
                              const uchar *new_row, DBT *new_key)
{
  DBUG_ENTER("restore_keys");
  int error;
  DBT tmp_key;
  uint keynr;

  /* Restore the old primary key, and the old row, but don't ignore
     duplicate key failure */
  if ((error=update_primary_key(trans, TRUE, new_row, new_key,
				old_row, old_key, FALSE)))
    goto err;

  /* Remove the new key, and put back the old key
     changed_keys is a map of all non-primary keys that need to be
     rolled back.  The last key set in changed_keys is the one that
     triggered the duplicate key error (it wasn't inserted), so for
     that one just put back the old value. */
  if (!changed_keys->is_clear_all())
  {
    for (keynr=0; keynr < table_share->keys+test(hidden_primary_key); keynr++)
    {
      if (changed_keys->is_set(keynr))
      {
	if (changed_keys->is_prefix(1) &&
	    (error = remove_key(trans, keynr, new_row, new_key)))
	  break;
	if ((error = key_file[keynr]->put(key_file[keynr], trans,
					  create_key(&tmp_key, keynr, key_buff2,
						     old_row),
					  old_key, key_type[keynr])))
	  break;
      }
    }
  }

err:
  DBUG_ASSERT(error != DB_KEYEXIST);
  DBUG_RETURN(error);
}

int ha_tokudb::update_row(const uchar *old_row, uchar *new_row)
{
  DBUG_ENTER("update_row");
  DBT prim_key, key, old_prim_key;
  int error;
  DB_TXN *sub_trans;
  bool primary_key_changed;

  LINT_INIT(error);
  statistic_increment(table->in_use->status_var.ha_update_count,&LOCK_status);
  if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_UPDATE)
    table->timestamp_field->set_time();

  table->insert_or_update= 1;  // For handling of VARCHAR
  if (hidden_primary_key)
  {
    primary_key_changed=0;
    bzero((void*) &prim_key, sizeof(prim_key));
    prim_key.data= (void*) current_ident;
    prim_key.size=TDB_HIDDEN_PRIMARY_KEY_LENGTH;
    old_prim_key=prim_key;
  }
  else
  {
    create_key(&prim_key, primary_key, key_buff, new_row);

    if ((primary_key_changed=key_cmp(primary_key, old_row, new_row)))
      create_key(&old_prim_key, primary_key, primary_key_buff, old_row);
    else
      old_prim_key=prim_key;
  }

  sub_trans = transaction;
  for (uint retry=0; retry < tokudb_trans_retry; retry++)
  {
    key_map changed_keys(0);
    /* Start by updating the primary key */
    if (!(error=update_primary_key(sub_trans, primary_key_changed,
				   old_row, &old_prim_key,
				   new_row, &prim_key,
				   using_ignore)))
    {
      // Update all other keys
      for (uint keynr=0; keynr < table_share->keys; keynr++)
      {
	if (keynr == primary_key)
	  continue;
	if (key_cmp(keynr, old_row, new_row) || primary_key_changed)
	{
	  if ((error=remove_key(sub_trans, keynr, old_row, &old_prim_key)))
	  {
	    table->insert_or_update= 0;
	    DBUG_RETURN(error);  // Fatal error
	  }
	  changed_keys.set_bit(keynr);
	  if ((error=key_file[keynr]->put(key_file[keynr], sub_trans,
					  create_key(&key, keynr, key_buff2,
						     new_row),
					  &prim_key, key_type[keynr])))
	  {
	    last_dup_key=keynr;
	    break;
	  }
	}
      }
    }
    if (error)
    {
      /* Remove inserted row */
      DBUG_PRINT("error",("Got error %d",error));
      if (using_ignore)
      {
	int new_error = 0;
	if (!changed_keys.is_clear_all())
	  new_error=restore_keys(transaction, &changed_keys, primary_key,
				 old_row, &old_prim_key, new_row, &prim_key);
	if (new_error)
	{
	  /* This shouldn't happen */
	  error=new_error;
	  break;
	}
      }
    }
    if (error != DB_LOCK_DEADLOCK)
      break;
  }
  table->insert_or_update= 0;
  if (error == DB_KEYEXIST)
    error=HA_ERR_FOUND_DUPP_KEY;
  DBUG_RETURN(error);
}

/*
  Delete one key
  This uses key_buff2, when keynr != primary key, so it's important that
  a function that calls this doesn't use this buffer for anything else.
*/

int ha_tokudb::remove_key(DB_TXN *trans, uint keynr, const uchar *record,
                            DBT *prim_key)
{
  DBUG_ENTER("remove_key");
  int error;
  DBT key;
  DBUG_PRINT("enter",("index: %d",keynr));

  if (keynr == active_index && cursor)
    error=cursor->c_del(cursor,0);
  else if (keynr == primary_key ||
	   ((table->key_info[keynr].flags & (HA_NOSAME | HA_NULL_PART_KEY)) ==
	    HA_NOSAME))
  {  // Unique key
    DBUG_ASSERT(keynr == primary_key || prim_key->data != key_buff2);
    error=key_file[keynr]->del(key_file[keynr], trans,
			       keynr == primary_key ?
			       prim_key :
			       create_key(&key, keynr, key_buff2, record),
			       0);
  }
  else
  {
    /*
      To delete the not duplicated key, we need to open an cursor on the
      row to find the key to be delete and delete it.
      We will never come here with keynr = primary_key
    */
    DBUG_ASSERT(keynr != primary_key && prim_key->data != key_buff2);
    DBC *tmp_cursor;
    if (!(error=key_file[keynr]->cursor(key_file[keynr], trans,
					&tmp_cursor, 0)))
    {
      if (!(error=tmp_cursor->c_get(tmp_cursor,
				    create_key(&key, keynr, key_buff2, record),
				    prim_key, DB_GET_BOTH | DB_RMW)))
      {  // This shouldn't happen
	error=tmp_cursor->c_del(tmp_cursor,0);
      }
      int result=tmp_cursor->c_close(tmp_cursor);
      if (!error)
	error=result;
    }
  }
  DBUG_RETURN(error);
}

/* Delete all keys for new_record */
int ha_tokudb::remove_keys(DB_TXN *trans,
                             const uchar *record,
                             DBT *new_record,
                             DBT *prim_key,
                             key_map *keys)
{
  int result= 0;
  for (uint keynr=0;
       keynr < table_share->keys+test(hidden_primary_key);
       keynr++)
  {
    if (keys->is_set(keynr))
    {
      int new_error=remove_key(trans, keynr, record, prim_key);
      if (new_error)
      {
	result=new_error;  // Return last error
	break;  // Let rollback correct things
      }
    }
  }
  return result;
}

int ha_tokudb::delete_row(const uchar *record)
{
  DBUG_ENTER("delete_row");
  int error;
  DBT row, prim_key;
  key_map keys= table_share->keys_in_use;
  statistic_increment(table->in_use->status_var.ha_delete_count,&LOCK_status);

  if ((error=pack_row(&row, record, 0)))
    DBUG_RETURN((error));
  create_key(&prim_key, primary_key, key_buff, record);
  if (hidden_primary_key)
    keys.set_bit(primary_key);

  /* Subtransactions may be used in order to retry the delete in
     case we get a DB_LOCK_DEADLOCK error. */
  DB_TXN *sub_trans = transaction;
  for (uint retry=0; retry < tokudb_trans_retry; retry++)
  {
    error=remove_keys(sub_trans, record, &row, &prim_key, &keys);
    if (error)
    {
      DBUG_PRINT("error",("Got error %d",error));
      break;  // No retry - return error
    }
    if (error != DB_LOCK_DEADLOCK)
      break;
  }
#ifdef CANT_COUNT_DELETED_ROWS
  if (!error)
    changed_rows--;
#endif
  DBUG_RETURN(error);
}

int ha_tokudb::index_init(uint keynr, bool sorted)
{
  DBUG_ENTER("ha_tokudb::index_init");
  int error;
  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"));
    cursor->c_close(cursor);
  }
  active_index=keynr;
  DBUG_ASSERT(keynr <= table->s->keys);
  DBUG_ASSERT(key_file[keynr]);
  if ((error=key_file[keynr]->cursor(key_file[keynr], transaction, &cursor,
				     table->reginfo.lock_type >
				     TL_WRITE_ALLOW_READ ?
				     0 : 0)))
    cursor=0;  // Safety
  bzero((void*) &last_key, sizeof(last_key));
  DBUG_RETURN(error);
}

int ha_tokudb::index_end()
{
  DBUG_ENTER("ha_tokudb::index_end");
  int error=0;
  if (cursor)
  {
    DBUG_PRINT("enter",("table: '%s'", table_share->table_name.str));
    error=cursor->c_close(cursor);
    cursor=0;
  }
  active_index=MAX_KEY;
  DBUG_RETURN(error);
}

/* What to do after we have read a row based on an index */
int ha_tokudb::read_row(int error, uchar *buf, uint keynr, DBT *row,
                          DBT *found_key, bool read_next)
{
  DBUG_ENTER("ha_tokudb::read_row");
  if (error)
  {
    if (error == DB_NOTFOUND || error == DB_KEYEMPTY)
      error=read_next ? HA_ERR_END_OF_FILE : HA_ERR_KEY_NOT_FOUND;
    table->status=STATUS_NOT_FOUND;
    DBUG_RETURN(error);
  }
  if (hidden_primary_key)
    memcpy_fixed(current_ident,
		 (char*) row->data+row->size-TDB_HIDDEN_PRIMARY_KEY_LENGTH,
		 TDB_HIDDEN_PRIMARY_KEY_LENGTH);
  table->status=0;
  if (keynr != primary_key)
  {
    /* We only found the primary key.  Now we have to use this to find
       the row data */
    if (key_read && found_key)
    {
      unpack_key(buf,found_key,keynr);
      if (!hidden_primary_key)
	unpack_key(buf,row,primary_key);
      DBUG_RETURN(0);
    }
    DBT key;
    bzero((void*) &key, sizeof(key));
    key.data=key_buff;
    key.size=row->size;
    // DBTs dont have app_private members anymore, that was a MySQL hack
    // now it seems to be called app_data
    // key.app_private= (void*) (table->key_info+primary_key);
    // key.app_data= (void*) (table->key_info+primary_key);
    memcpy(key_buff,row->data,row->size);
    /* Read the data into current_row */
    current_row.flags=DB_DBT_REALLOC;
    if ((error=file->get(file, transaction, &key, &current_row, 0)))
    {
      table->status=STATUS_NOT_FOUND;
      DBUG_RETURN(error == DB_NOTFOUND ? HA_ERR_CRASHED : error);
    }
    row= &current_row;
  }
  unpack_row(buf,row);
  DBUG_RETURN(0);
}

/*
  This is only used to read whole keys
*/
int ha_tokudb::index_read_idx(uchar *buf, uint keynr, const uchar *key,
                                uint key_len, enum ha_rkey_function find_flag)
{
  DBUG_ENTER("ha_tokudb::index_read_idx");
  table->in_use->status_var.ha_read_key_count++;
  current_row.flags=DB_DBT_REALLOC;
  active_index=MAX_KEY;
  DBUG_RETURN(read_row(key_file[keynr]->get(key_file[keynr],
					    transaction,
					    pack_key(&last_key,
						     keynr,
						     key_buff,
						     key,
						     key_len),
					    &current_row,0),
		       buf, keynr, &current_row, &last_key, 0));
}


int ha_tokudb::index_read(uchar *buf, const uchar *key,
                            uint key_len, enum ha_rkey_function find_flag)
{
  DBUG_ENTER("ha_tokudb::index_read");
  DBT row;
  int error;
  KEY *key_info= &table->key_info[active_index];
  int do_prev= 0;

  table->in_use->status_var.ha_read_key_count++;
  bzero((void*) &row, sizeof(row));
  if (find_flag == HA_READ_BEFORE_KEY)
  {
    find_flag= HA_READ_KEY_OR_NEXT;
    do_prev= 1;
  }
  else if (find_flag == HA_READ_PREFIX_LAST_OR_PREV)
  {
    find_flag= HA_READ_AFTER_KEY;
    do_prev= 1;
  }
  if (key_len == key_info->key_length &&
      !(table->key_info[active_index].flags & HA_END_SPACE_KEY))
  {
    if (find_flag == HA_READ_AFTER_KEY)
      key_info->handler.bdb_return_if_eq= 1;
    error= read_row(cursor->c_get(cursor, pack_key(&last_key,
						   active_index,
						   key_buff,
						   key, key_len),
				  &row,
				  (find_flag == HA_READ_KEY_EXACT ?
				   DB_SET : DB_SET_RANGE)),
		    buf, active_index, &row, (DBT*) 0, 0);
    key_info->handler.bdb_return_if_eq= 0;
  }
  else
  {
    /* read of partial key */
    pack_key(&last_key, active_index, key_buff, key, key_len);
    /* Store for compare */
    memcpy(key_buff2, key_buff, (key_len=last_key.size));
    /*
      If HA_READ_AFTER_KEY is set, return next key, else return first
      matching key.
    */
    key_info->handler.bdb_return_if_eq= (find_flag == HA_READ_AFTER_KEY ?
					 1 : -1);
    error=read_row(cursor->c_get(cursor, &last_key, &row, DB_SET_RANGE),
		   buf, active_index, &row, (DBT*) 0, 0);
    key_info->handler.bdb_return_if_eq= 0;
    if (!error && find_flag == HA_READ_KEY_EXACT)
    {
      /* Ensure that we found a key that is equal to the current one */
      if (!error && tokudb_key_cmp(table, key_info, key_buff2, key_len))
	error=HA_ERR_KEY_NOT_FOUND;
    }
  }
  if (do_prev)
  {
    bzero((void*) &row, sizeof(row));
    error= read_row(cursor->c_get(cursor, &last_key, &row, DB_PREV),
		    buf, active_index, &row, &last_key, 1);
  }
  DBUG_RETURN(error);
}

/*
  Read last key is solved by reading the next key and then reading
  the previous key
*/

int ha_tokudb::index_read_last(uchar *buf, const uchar *key, uint key_len)
{
  DBUG_ENTER("ha_tokudb::index_read_last");
  DBT row;
  int error;
  KEY *key_info= &table->key_info[active_index];

  statistic_increment(table->in_use->status_var.ha_read_key_count,
		      &LOCK_status);
  bzero((void*) &row, sizeof(row));

  /* read of partial key */
  pack_key(&last_key, active_index, key_buff, key, key_len);
  /* Store for compare */
  memcpy(key_buff2, key_buff, (key_len=last_key.size));
  key_info->handler.bdb_return_if_eq= 1;
  error=read_row(cursor->c_get(cursor, &last_key, &row, DB_SET_RANGE),
		 buf, active_index, &row, (DBT*) 0, 0);
  key_info->handler.bdb_return_if_eq= 0;
  bzero((void*) &row, sizeof(row));
  if (read_row(cursor->c_get(cursor, &last_key, &row, DB_PREV),
	       buf, active_index, &row, &last_key, 1) ||
      tokudb_key_cmp(table, key_info, key_buff2, key_len))
    error=HA_ERR_KEY_NOT_FOUND;
  DBUG_RETURN(error);
}


int ha_tokudb::index_next(uchar *buf)
{
  DBUG_ENTER("ha_tokudb::index_next");
  DBT row;
  statistic_increment(table->in_use->status_var.ha_read_next_count,
		      &LOCK_status);
  bzero((void*) &row, sizeof(row));
  DBUG_RETURN(read_row(cursor->c_get(cursor, &last_key, &row, DB_NEXT),
		       buf, active_index, &row, &last_key, 1));
}

int ha_tokudb::index_next_same(uchar *buf, const uchar *key, uint keylen)
{
  DBUG_ENTER("ha_tokudb::index_next_same");
  DBT row;
  int error;
  statistic_increment(table->in_use->status_var.ha_read_next_count,
		      &LOCK_status);
  bzero((void*) &row, sizeof(row));
  if (keylen == table->key_info[active_index].key_length &&
      !(table->key_info[active_index].flags & HA_END_SPACE_KEY))
    error=read_row(cursor->c_get(cursor, &last_key, &row, DB_NEXT_DUP),
		   buf, active_index, &row, &last_key, 1);
  else
  {
    error=read_row(cursor->c_get(cursor, &last_key, &row, DB_NEXT),
		   buf, active_index, &row, &last_key, 1);
    if (!error && ::key_cmp_if_same(table, key, active_index, keylen))
      error=HA_ERR_END_OF_FILE;
  }
  DBUG_RETURN(error);
}

int ha_tokudb::index_prev(uchar *buf)
{
  DBUG_ENTER("ha_tokudb::index_prev");
  DBT row;
  statistic_increment(table->in_use->status_var.ha_read_prev_count,
		      &LOCK_status);
  bzero((void*) &row, sizeof(row));
  DBUG_RETURN(read_row(cursor->c_get(cursor, &last_key, &row, DB_PREV),
		       buf, active_index, &row, &last_key, 1));
}

int ha_tokudb::index_first(uchar *buf)
{
  DBUG_ENTER("ha_tokudb::index_first");
  DBT row;
  statistic_increment(table->in_use->status_var.ha_read_first_count,
		      &LOCK_status);
  bzero((void*) &row, sizeof(row));
  DBUG_RETURN(read_row(cursor->c_get(cursor, &last_key, &row, DB_FIRST),
		       buf, active_index, &row, &last_key, 1));
}

int ha_tokudb::index_last(uchar *buf)
{
  DBUG_ENTER("ha_tokudb::index_last");
  DBT row;
  statistic_increment(table->in_use->status_var.ha_read_last_count,
		      &LOCK_status);
  bzero((void*) &row, sizeof(row));
  DBUG_RETURN(read_row(cursor->c_get(cursor, &last_key, &row, DB_LAST),
		       buf, active_index, &row, &last_key, 0));
}

int ha_tokudb::rnd_init(bool scan)
{
  DBUG_ENTER("ha_tokudb::rnd_init");
  current_row.flags=DB_DBT_REALLOC;
  DBUG_RETURN(index_init(primary_key, 0));
}

int ha_tokudb::rnd_end()
{
  return index_end();
}

int ha_tokudb::rnd_next(uchar *buf)
{
  DBUG_ENTER("ha_tokudb::ha_tokudb::rnd_next");
  DBT row;
  statistic_increment(table->in_use->status_var.ha_read_rnd_next_count,
		      &LOCK_status);
  bzero((void*) &row, sizeof(row));
  DBUG_RETURN(read_row(cursor->c_get(cursor, &last_key, &row, DB_NEXT),
		       buf, primary_key, &row, &last_key, 1));
}


DBT *ha_tokudb::get_pos(DBT *to, uchar *pos)
{
  /* We don't need to set app_data here */
  bzero((void*)to, sizeof(*to));

  to->data=pos;
  if (share->fixed_length_primary_key)
    to->size=ref_length;
  else
  {
    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++)
      pos+=key_part->field->packed_col_length(pos, key_part->length);
    to->size= (uint) (pos - (uchar*) to->data);
  }
  DBUG_DUMP("key", (const uchar *) to->data, to->size);
  return to;
}

int ha_tokudb::rnd_pos(uchar *buf, uchar *pos)
{
  DBUG_ENTER("ha_tokudb::rnd_pos");
  DBT db_pos;
  statistic_increment(table->in_use->status_var.ha_read_rnd_count,
		      &LOCK_status);
  active_index= MAX_KEY;
  DBUG_RETURN(read_row(file->get(file, transaction,
				 get_pos(&db_pos, pos),
				 &current_row, 0),
		       buf, primary_key, &current_row, (DBT*) 0, 0));
}

/*
  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
*/

void ha_tokudb::position(const uchar *record)
{
  DBUG_ENTER("ha_tokudb::position");
  DBT key;
  if (hidden_primary_key)
  {
    DBUG_ASSERT(ref_length == TDB_HIDDEN_PRIMARY_KEY_LENGTH);
    memcpy_fixed(ref, (char*) current_ident, TDB_HIDDEN_PRIMARY_KEY_LENGTH);
  }
  else
  {
    create_key(&key, primary_key, ref, record);
    if (key.size < ref_length)
      bzero(ref + key.size, ref_length - key.size);
  }
  DBUG_VOID_RETURN;
}

int ha_tokudb::info(uint flag)
{
  DBUG_ENTER("ha_tokudb::info");
  if (flag & HA_STATUS_VARIABLE)
  {
    // Just to get optimizations right
    stats.records = share->rows + changed_rows;
    stats.deleted = 0;
  }
  if ((flag & HA_STATUS_CONST) || version != share->version)
  {
    version=share->version;
    for (uint i=0; i < table_share->keys; i++)
    {
      table->key_info[i].rec_per_key[table->key_info[i].key_parts-1]=
	share->rec_per_key[i];
    }
  }
  /* Don't return key if we got an error for the internal primary key */
  if (flag & HA_STATUS_ERRKEY && last_dup_key < table_share->keys)
    errkey= last_dup_key;
  DBUG_RETURN(0);
}


int ha_tokudb::extra(enum ha_extra_function operation)
{
  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;
  }
  return 0;
}

int ha_tokudb::reset(void)
{
  key_read= 0;
  using_ignore= 0;
  if (current_row.flags & (DB_DBT_MALLOC | DB_DBT_REALLOC))
  {
    current_row.flags= 0;
    if (current_row.data)
    {
      free(current_row.data);
      current_row.data= 0;
    }
  }
  return 0;
}

/*
  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.
*/

int ha_tokudb::external_lock(THD *thd, int lock_type)
{
  DBUG_ENTER("ha_tokudb::external_lock");
  int error=0;
  tokudb_trx_data *trx=(tokudb_trx_data *)thd->ha_data[tdb_hton->slot];
  if (!trx)
  {
    thd->ha_data[tdb_hton->slot]= trx= (tokudb_trx_data *)
      my_malloc(sizeof(*trx), MYF(MY_ZEROFILL));
    if (!trx)
      DBUG_RETURN(1);
  }
  if (trx->all == 0)
    trx->sp_level= 0;
  if (lock_type != F_UNLCK)
  {
    if (!trx->tdb_lock_count++)
    {
      DBUG_ASSERT(trx->stmt == 0);
      transaction=0;  // Safety
      /* First table lock, start transaction */
      if ((thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN |
			   OPTION_TABLE_LOCK)) && !trx->all)
      {
	/* We have to start a master transaction */
	DBUG_PRINT("trans",("starting transaction all:  options: 0x%lx",
			    (ulong) thd->options));
	if ((error= db_env->txn_begin(db_env, NULL, &trx->all, 0)))
	{
	  trx->tdb_lock_count--;  // We didn't get the lock
	  DBUG_RETURN(error);
	}
	trx->sp_level= trx->all;
	trans_register_ha(thd, TRUE, tdb_hton);
	if (thd->in_lock_tables)
	  DBUG_RETURN(0);  // Don't create stmt trans
      }
      DBUG_PRINT("trans",("starting transaction stmt"));
      if ((error= db_env->txn_begin(db_env, trx->sp_level, &trx->stmt, 0)))
      {
	/* We leave the possible master transaction open */
	trx->tdb_lock_count--;  // We didn't get the lock
	DBUG_RETURN(error);
      }
      trans_register_ha(thd, FALSE, tdb_hton);
    }
    transaction= trx->stmt;
  }
  else
  {
    lock.type=TL_UNLOCK;  // Unlocked
    thread_safe_add(share->rows, changed_rows, &share->mutex);
    changed_rows=0;
    if (!--trx->tdb_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"));
	error= trx->stmt->commit(trx->stmt,0);
	trx->stmt= transaction= 0;
      }
    }
  }
  DBUG_RETURN(error);
}


/*
  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.
*/

int ha_tokudb::start_stmt(THD *thd, thr_lock_type lock_type)
{
  DBUG_ENTER("ha_tokudb::start_stmt");
  int error=0;
  tokudb_trx_data *trx= (tokudb_trx_data *)thd->ha_data[tdb_hton->slot];
  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)
  {
    DBUG_PRINT("trans",("starting transaction stmt"));
    error= db_env->txn_begin(db_env, trx->sp_level, &trx->stmt, 0);
    trans_register_ha(thd, FALSE, tdb_hton);
  }
  transaction= trx->stmt;
  DBUG_RETURN(error);
}

/*
  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.
*/

THR_LOCK_DATA **ha_tokudb::store_lock(THD *thd, THR_LOCK_DATA **to,
                                        enum thr_lock_type lock_type)
{
  if (lock_type != TL_IGNORE && lock.type == TL_UNLOCK)
  {
    /* 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)
      lock_type = TL_WRITE_ALLOW_WRITE;
    lock.type= lock_type;
  }
  *to++= &lock;
  return to;
}


static int create_sub_table(const char *table_name, const char *sub_name,
                            DBTYPE type, int flags)
{
  DBUG_ENTER("create_sub_table");
  int error;
  DB *file;
  DBUG_PRINT("enter",("sub_name: %s  flags: %d",sub_name, flags));

  if (!(error=db_create(&file, db_env, 0)))
  {
    file->set_flags(file, flags);
    error=(file->open(file, NULL, table_name, sub_name, type,
		      DB_THREAD | DB_CREATE, my_umask));
    if (error)
    {
      DBUG_PRINT("error",("Got error: %d when opening table '%s'",error,
			  table_name));
      (void) file->remove(file,table_name,NULL,0);
    }
    else
      (void) file->close(file,0);
  }
  else
  {
2416
    DBUG_PRINT("error",("Got error: %d when creating table",error));
2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428
  }
  if (error)
    my_errno=error;
  DBUG_RETURN(error);
}

int ha_tokudb::create(const char *name, TABLE *form,
                        HA_CREATE_INFO *create_info)
{
  DBUG_ENTER("ha_tokudb::create");
  char name_buff[FN_REFLEN];
  int error;
2429 2430
  char newname[strlen(name) + 32];

2431 2432
  sprintf(newname, "%s%s", name, ha_tokudb_ext);
  error = mkdir(newname, 0777);
2433 2434 2435
  if (error != 0) {
      DBUG_RETURN(errno);
  }
2436

2437
  sprintf(newname, "%s%s/main", name, ha_tokudb_ext);
2438
  fn_format(name_buff, newname, "", ha_tokudb_ext, MY_UNPACK_FILENAME|MY_APPEND_EXT);
2439 2440 2441 2442 2443 2444

  /* Create the main table that will hold the real rows */
  if ((error= create_sub_table(name_buff,"main",DB_BTREE,0)))
    DBUG_RETURN(error);

  primary_key= form->s->primary_key;
2445

2446
  /* Create the keys */
2447 2448
  char part[7];
  uint index=1;
2449 2450 2451 2452 2453
  for (uint i=0; i < form->s->keys; i++)
  {
    if (i != primary_key)
    {
      sprintf(part,"key%02d",index++);
2454
      sprintf(newname, "%s%s/%s", name, ha_tokudb_ext, part);
2455
      fn_format(name_buff, newname, "", ha_tokudb_ext, MY_UNPACK_FILENAME|MY_APPEND_EXT);
2456 2457
      if ((error= create_sub_table(name_buff, part, DB_BTREE,
				   (form->key_info[i].flags & HA_NOSAME) ? 0 :
2458
				   DB_DUP+DB_DUPSORT)))
2459 2460 2461 2462 2463 2464 2465 2466 2467 2468
	DBUG_RETURN(error);
    }
  }

  /* Create the status block to save information from last status command */
  /* Is DB_BTREE the best option here ? (QUEUE can't be used in sub tables) */

  DB *status_block;
  if (!(error=(db_create(&status_block, db_env, 0))))
  {
2469
    sprintf(newname, "%s%s/status", name, ha_tokudb_ext);
2470 2471
    fn_format(name_buff, newname, "", ha_tokudb_ext, MY_UNPACK_FILENAME|MY_APPEND_EXT);

2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484
    if (!(error=(status_block->open(status_block, NULL, name_buff,
				    "status", DB_BTREE, DB_CREATE, 0))))
    {
      char rec_buff[4+MAX_KEY*4];
      uint length= 4+ form->s->keys*4;
      bzero(rec_buff, length);
      error= write_status(status_block, rec_buff, length);
      status_block->close(status_block,0);
    }
  }
  DBUG_RETURN(error);
}

2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515
#include <dirent.h>

static int rmall(const char *dname) {
    int error = 0;
    DIR *d = opendir(dname);
    if (d) {
        struct dirent *dirent;
        while ((dirent = readdir(d)) != 0) {
            if (0 == strcmp(dirent->d_name, ".") || 0 == strcmp(dirent->d_name, ".."))
                continue;
            char fname[strlen(dname) + 1 + strlen(dirent->d_name) + 1];
            sprintf(fname, "%s/%s", dname, dirent->d_name);
            if (dirent->d_type == DT_DIR) {
                error = rmall(fname);
            } else 
                error = remove(fname);
            if (error != 0) {
                error = errno;
                break;
            }
        }
        closedir(d);
        if (error == 0) {
            error = remove(dname);
            if (error != 0)
                error = errno;
        }
    } else
        error = errno;
    return error;
}
2516 2517 2518 2519 2520

int ha_tokudb::delete_table(const char *name)
{
  DBUG_ENTER("ha_tokudb::delete_table");
  int error;
2521
#if 0
2522
  char name_buff[FN_REFLEN];
2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537
  char newname[strlen(name) + 32];

  sprintf(newname, "%s/main", name);
  fn_format(name_buff, newname, "", ha_tokudb_ext, MY_UNPACK_FILENAME|MY_APPEND_EXT);
  error = db_create(&file, db_env, 0);
  if (error != 0) goto exit;
  error = file->remove(file, name_buff, NULL, 0);

  sprintf(newname, "%s/status", name);
  fn_format(name_buff, newname, "", ha_tokudb_ext, MY_UNPACK_FILENAME|MY_APPEND_EXT);
  error = db_create(&file, db_env, 0);
  if (error != 0) goto exit;
  error = file->remove(file, name_buff, NULL, 0);

exit:
2538
  file= 0;  // Safety
2539 2540
  my_errno = error;
#else
2541 2542 2543 2544
  char newname[strlen(name) + 32];
  sprintf(newname, "%s%s", name, ha_tokudb_ext);
  error = rmall(newname); 
  my_errno = error;
2545
#endif
2546 2547 2548 2549 2550 2551 2552
  DBUG_RETURN(error);
}


int ha_tokudb::rename_table(const char * from, const char * to)
{
  int error;
2553
#if 0
2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568
  char from_buff[FN_REFLEN];
  char to_buff[FN_REFLEN];

  if ((error= db_create(&file, db_env, 0)))
    my_errno= error;
  else
  {
    /* On should not do a file->close() after rename returns */
    error= file->rename(file,
			fn_format(from_buff, from, "",
				  ha_tokudb_ext,
				  MY_UNPACK_FILENAME|MY_APPEND_EXT),
			NULL, fn_format(to_buff, to, "", ha_tokudb_ext,
					MY_UNPACK_FILENAME|MY_APPEND_EXT), 0);
  }
2569
#else
2570 2571 2572
  char newfrom[strlen(from) + 32]; sprintf(newfrom, "%s%s", from, ha_tokudb_ext);
  char newto[strlen(to) + 32]; sprintf(newto, "%s%s", to, ha_tokudb_ext);
  error = rename(newfrom, newto);
2573 2574
  if (error != 0) 
      error = my_errno = errno;
2575
#endif
2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594
  return error;
}


/*
  How many seeks it will take to read through the table
  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.
*/

double ha_tokudb::scan_time()
{
  return rows2double(stats.records/3);
}

ha_rows ha_tokudb::records_in_range(uint keynr, key_range *start_key,
                                      key_range *end_key)
{
  DBUG_ENTER("ha_tokudb::records_in_range");
2595
#if 0
2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644
  DBT key;
  DB_KEY_RANGE start_range, end_range;
  DB *kfile=key_file[keynr];
  double start_pos,end_pos,rows;
  bool error;
  KEY *key_info= &table->key_info[keynr];

  /* Ensure we get maximum range, even for varchar keys with different space */
  key_info->handler.bdb_return_if_eq= -1;
  error= ((start_key && kfile->key_range(kfile,transaction,
					 pack_key(&key, keynr, key_buff,
						  start_key->key,
						  start_key->length),
					 &start_range,0)));
  if (error)
  {
    key_info->handler.bdb_return_if_eq= 0;
    // Better than returning an error
    DBUG_RETURN(HA_TOKUDB_RANGE_COUNT);
  }
  key_info->handler.bdb_return_if_eq= 1;
  error= (end_key && kfile->key_range(kfile,transaction,
				      pack_key(&key, keynr, key_buff,
					       end_key->key,
					       end_key->length),
				      &end_range,0));
  key_info->handler.bdb_return_if_eq= 0;
  if (error)
  {
    // Better than returning an error
    DBUG_RETURN(HA_TOKUDB_RANGE_COUNT);
  }

  if (!start_key)
    start_pos= 0.0;
  else if (start_key->flag == HA_READ_KEY_EXACT)
    start_pos=start_range.less;
  else
    start_pos=start_range.less+start_range.equal;

  if (!end_key)
    end_pos= 1.0;
  else if (end_key->flag == HA_READ_BEFORE_KEY)
    end_pos=end_range.less;
  else
    end_pos=end_range.less+end_range.equal;
  rows=(end_pos-start_pos)*stats.records;
  DBUG_PRINT("exit",("rows: %g",rows));
  DBUG_RETURN((ha_rows)(rows <= 1.0 ? 1 : rows));
2645 2646 2647
#else
  DBUG_RETURN(HA_TOKUDB_RANGE_COUNT);
#endif
2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778
}


void ha_tokudb::get_auto_increment(ulonglong offset, ulonglong increment,
                                     ulonglong nb_desired_values,
                                     ulonglong *first_value,
                                     ulonglong *nb_reserved_values)
{
  /* Ideally in case of real error (not "empty table") nr should be ~ULL(0) */
  ulonglong nr=1;  // Default if error or new key
  int error;
  (void) ha_tokudb::extra(HA_EXTRA_KEYREAD);

  /* Set 'active_index' */
  ha_tokudb::index_init(table_share->next_number_index, 0);

  if (!table_share->next_number_key_offset)
  {  // Autoincrement at key-start
    error=ha_tokudb::index_last(table->record[1]);
    /* has taken read lock on page of max key so reserves to infinite  */
    *nb_reserved_values= ULONGLONG_MAX;
  }
  else
  {
    /*
      MySQL needs to call us for next row: assume we are inserting ("a",null)
      here, we return 3, and next this statement will want to insert ("b",null):
      there is no reason why ("b",3+1) would be the good row to insert: maybe it
      already exists, maybe 3+1 is too large...
    */
    *nb_reserved_values= 1;
    DBT row, old_key;
    bzero((void*) &row, sizeof(row));
    KEY *key_info= &table->key_info[active_index];

    /* Reading next available number for a sub key */
    ha_tokudb::create_key(&last_key, active_index,
			    key_buff, table->record[0],
			    table_share->next_number_key_offset);
    /* Store for compare */
    memcpy(old_key.data=key_buff2, key_buff, (old_key.size=last_key.size));
    // DBTs dont have app_private members anymore, that was a MySQL hack
    // instead it seems to be called app_data
    // old_key.app_private= (void*)key_info;
    // old_key.app_data = (void*)key_info;
    error= 1;
    {
      /* Modify the compare so that we will find the next key */
      key_info->handler.bdb_return_if_eq= 1;
      /* We lock the next key as the new key will probl. be on the same page */
      error=cursor->c_get(cursor, &last_key, &row, DB_SET_RANGE | DB_RMW);
      key_info->handler.bdb_return_if_eq= 0;
      if (!error || error == DB_NOTFOUND)
      {
	/*
	  Now search go one step back and then we should have found the
	  biggest key with the given prefix
	*/
	error= 1;
	if (!cursor->c_get(cursor, &last_key, &row, DB_PREV | DB_RMW) &&
	    !tokudb_cmp_packed_key(key_file[active_index], &old_key,
				     &last_key))
	{
	  error=0;  // Found value
	  unpack_key(table->record[1], &last_key, active_index);
	}
      }
    }
  }
  if (!error)
    nr= (ulonglong)
      table->next_number_field->val_int_offset(0)+1;
  ha_tokudb::index_end();
  (void) ha_tokudb::extra(HA_EXTRA_NO_KEYREAD);
  *first_value= nr;
}

void ha_tokudb::print_error(int error, myf errflag)
{
  if (error == DB_LOCK_DEADLOCK)
    error= HA_ERR_LOCK_DEADLOCK;
  handler::print_error(error,errflag);
}

int ha_tokudb::analyze(THD* thd, HA_CHECK_OPT* check_opt)
{
#if 0
  uint i;
  DB_BTREE_STAT *stat= 0;
  DB_TXN_STAT *txn_stat_ptr= 0;
  tokudb_trx_data *trx= (tokudb_trx_data *)thd->ha_data[tdb_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->rows= stat->bt_ndata;
  share->status |= STATUS_TDB_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_TDB_ANALYZE) ? HA_ADMIN_FAILED :
	  HA_ADMIN_OK);

err:
  if (stat)
    free(stat);
  return HA_ADMIN_FAILED;
2779 2780 2781
#else
  return HA_ADMIN_NOT_IMPLEMENTED;
#endif
2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924
}

int ha_tokudb::optimize(THD* thd, HA_CHECK_OPT* check_opt)
{
  return ha_tokudb::analyze(thd,check_opt);
}

int ha_tokudb::check(THD* thd, HA_CHECK_OPT* check_opt)
{
  DBUG_ENTER("ha_tokudb::check");
  DBUG_RETURN(HA_ADMIN_NOT_IMPLEMENTED);
  // look in old_ha_tokudb.cc for a start of an implementation
}

struct st_mysql_storage_engine storage_engine_structure=
{ MYSQL_HANDLERTON_INTERFACE_VERSION };

// options flags
//   PLUGIN_VAR_THDLOCAL  Variable is per-connection
//   PLUGIN_VAR_READONLY  Server variable is read only
//   PLUGIN_VAR_NOSYSVAR  Not a server variable
//   PLUGIN_VAR_NOCMDOPT  Not a command line option
//   PLUGIN_VAR_NOCMDARG  No argument for cmd line
//   PLUGIN_VAR_RQCMDARG  Argument required for cmd line
//   PLUGIN_VAR_OPCMDARG  Argument optional for cmd line
//   PLUGIN_VAR_MEMALLOC  String needs memory allocated

static MYSQL_SYSVAR_ULONG(cache_parts,
                          tokudb_cache_parts,
                          PLUGIN_VAR_READONLY,
                          "Sets bdb set_cachesize ncache",
                          NULL, NULL, 0, 0, ~0L, 0);

static MYSQL_SYSVAR_ULONGLONG(cache_size,
                              tokudb_cache_size,
                              PLUGIN_VAR_READONLY,
                              "Sets bdb set_cachesize gbytes & bytes",
                              NULL, NULL, 8*1024*1024, 0, ~0LL, 0);

// this is really a u_int32_t
// ? use MYSQL_SYSVAR_SET
static MYSQL_SYSVAR_UINT(env_flags,
                         tokudb_env_flags,
                         PLUGIN_VAR_READONLY,
                         "Sets bdb set_flags",
                         NULL, NULL, DB_LOG_AUTOREMOVE, 0, ~0, 0);

static MYSQL_SYSVAR_STR(home,
			tokudb_home,
                        PLUGIN_VAR_READONLY,
                        "Sets bdb DB_ENV->open db_home",
                        NULL, NULL, NULL);

// this is really a u_int32_t
//? use MYSQL_SYSVAR_SET
static MYSQL_SYSVAR_UINT(init_flags,
                         tokudb_init_flags,
                         PLUGIN_VAR_READONLY,
                         "Sets bdb DB_ENV->open flags",
                         NULL, NULL, DB_PRIVATE | DB_RECOVER, 0, ~0, 0);

// this looks to be unused
static MYSQL_SYSVAR_LONG(lock_scan_time,
                         tokudb_lock_scan_time,
                         PLUGIN_VAR_READONLY,
                         "Tokudb Lock Scan Time (UNUSED)",
                         NULL, NULL, 0, 0, ~0L, 0);

// this is really a u_int32_t
//? use MYSQL_SYSVAR_ENUM
static MYSQL_SYSVAR_UINT(lock_type,
                         tokudb_lock_type,
                         PLUGIN_VAR_READONLY,
			 "Sets set_lk_detect",
                         NULL, NULL, DB_LOCK_DEFAULT, 0, ~0, 0);

static MYSQL_SYSVAR_ULONG(log_buffer_size,
                          tokudb_log_buffer_size,
                          PLUGIN_VAR_READONLY,
                          "Tokudb Log Buffer Size",
                          NULL, NULL, 0, 0, ~0L, 0);

static MYSQL_SYSVAR_STR(logdir, tokudb_logdir,
                        PLUGIN_VAR_READONLY,
                        "Tokudb Log Dir",
                        NULL, NULL, NULL);

static MYSQL_SYSVAR_ULONG(max_lock,
                          tokudb_max_lock,
                          PLUGIN_VAR_READONLY,
                          "Tokudb Max Lock",
                          NULL, NULL, 8*1024, 0, ~0L, 0);

static MYSQL_SYSVAR_ULONG(region_size,
                          tokudb_region_size,
                          PLUGIN_VAR_READONLY,
                          "Tokudb Region Size",
                          NULL, NULL, 128*1024, 0, ~0L, 0);

static MYSQL_SYSVAR_BOOL(shared_data,
                         tokudb_shared_data,
                         PLUGIN_VAR_READONLY,
                         "Tokudb Shared Data",
                         NULL, NULL, FALSE);

static MYSQL_SYSVAR_STR(tmpdir, tokudb_tmpdir,
                        PLUGIN_VAR_READONLY,
                        "Tokudb Tmp Dir",
                        NULL, NULL, NULL);

static struct st_mysql_sys_var* tdb_system_variables[]= {
  MYSQL_SYSVAR(cache_parts),
  MYSQL_SYSVAR(cache_size),
  MYSQL_SYSVAR(env_flags),
  MYSQL_SYSVAR(home),
  MYSQL_SYSVAR(init_flags),
  MYSQL_SYSVAR(lock_scan_time),
  MYSQL_SYSVAR(lock_type),
  MYSQL_SYSVAR(log_buffer_size),
  MYSQL_SYSVAR(logdir),
  MYSQL_SYSVAR(max_lock),
  MYSQL_SYSVAR(region_size),
  MYSQL_SYSVAR(shared_data),
  MYSQL_SYSVAR(tmpdir),
  NULL
};

mysql_declare_plugin(tokudb)
{
  MYSQL_STORAGE_ENGINE_PLUGIN,
  &storage_engine_structure,
  "TokuDB",
  "Tokutek Inc",
  "Supports transactions and page-level locking",
  PLUGIN_LICENSE_BSD,
  tdb_init_func, /* plugin init */
  tdb_done_func, /* plugin deinit */
  0x0200, /* 2.0 */
  NULL, /* status variables */
  tdb_system_variables, /* system variables */
  NULL /* config options */
}
mysql_declare_plugin_end;