sql_table.cc 133 KB
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/* Copyright (C) 2000-2004 MySQL AB
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   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; version 2 of the License.
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   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

/* drop and alter of tables */

#include "mysql_priv.h"
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#ifdef HAVE_BERKELEY_DB
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#include "ha_berkeley.h"
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#endif
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#include <hash.h>
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#include <myisam.h>
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#include <my_dir.h>
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#include "sp_head.h"
#include "sql_trigger.h"
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#ifdef __WIN__
#include <io.h>
#endif

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const char *primary_key_name="PRIMARY";
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static bool check_if_keyname_exists(const char *name,KEY *start, KEY *end);
static char *make_unique_key_name(const char *field_name,KEY *start,KEY *end);
static int copy_data_between_tables(TABLE *from,TABLE *to,
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                                    List<create_field> &create, bool ignore,
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				    uint order_num, ORDER *order,
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				    ha_rows *copied,ha_rows *deleted,
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                                    enum enum_enable_or_disable keys_onoff,
                                    bool error_if_not_empty);
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static bool prepare_blob_field(THD *thd, create_field *sql_field);
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static bool check_engine(THD *thd, const char *table_name,
                         enum db_type *new_engine);                             
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static void set_tmp_file_path(char *buf, size_t bufsize, THD *thd);
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/*
 Build the path to a file for a table (or the base path that can
 then have various extensions stuck on to it).

  SYNOPSIS
   build_table_path()
   buff                 Buffer to build the path into
   bufflen              sizeof(buff)
   db                   Name of database
   table                Name of table
   ext                  Filename extension

  RETURN
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    0                   Error
    #                   Size of path
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 */

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uint build_table_path(char *buff, size_t bufflen, const char *db,
                      const char *table, const char *ext)
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{
  strxnmov(buff, bufflen-1, mysql_data_home, "/", db, "/", table, ext,
           NullS);
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  return unpack_filename(buff,buff);
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}



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/*
 delete (drop) tables.

  SYNOPSIS
   mysql_rm_table()
   thd			Thread handle
   tables		List of tables to delete
   if_exists		If 1, don't give error if one table doesn't exists

  NOTES
    Will delete all tables that can be deleted and give a compact error
    messages for tables that could not be deleted.
    If a table is in use, we will wait for all users to free the table
    before dropping it

    Wait if global_read_lock (FLUSH TABLES WITH READ LOCK) is set.

  RETURN
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    FALSE OK.  In this case ok packet is sent to user
    TRUE  Error
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*/
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bool mysql_rm_table(THD *thd,TABLE_LIST *tables, my_bool if_exists,
                    my_bool drop_temporary)
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{
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  bool error= FALSE, need_start_waiters= FALSE;
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  DBUG_ENTER("mysql_rm_table");

  /* mark for close and remove all cached entries */

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  if (!drop_temporary)
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  {
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    if ((error= wait_if_global_read_lock(thd, 0, 1)))
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    {
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      my_error(ER_TABLE_NOT_LOCKED_FOR_WRITE, MYF(0), tables->table_name);
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      DBUG_RETURN(TRUE);
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    }
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    else
      need_start_waiters= TRUE;
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  }
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  /*
    Acquire LOCK_open after wait_if_global_read_lock(). If we would hold
    LOCK_open during wait_if_global_read_lock(), other threads could not
    close their tables. This would make a pretty deadlock.
  */
  thd->mysys_var->current_mutex= &LOCK_open;
  thd->mysys_var->current_cond= &COND_refresh;
  VOID(pthread_mutex_lock(&LOCK_open));

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  error= mysql_rm_table_part2(thd, tables, if_exists, drop_temporary, 0, 0);
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  pthread_mutex_unlock(&LOCK_open);

  pthread_mutex_lock(&thd->mysys_var->mutex);
  thd->mysys_var->current_mutex= 0;
  thd->mysys_var->current_cond= 0;
  pthread_mutex_unlock(&thd->mysys_var->mutex);

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  if (need_start_waiters)
    start_waiting_global_read_lock(thd);

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  if (error)
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    DBUG_RETURN(TRUE);
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  send_ok(thd);
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  DBUG_RETURN(FALSE);
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}

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/*
 delete (drop) tables.

  SYNOPSIS
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    mysql_rm_table_part2_with_lock()
    thd			Thread handle
    tables		List of tables to delete
    if_exists		If 1, don't give error if one table doesn't exists
    dont_log_query	Don't write query to log files. This will also not
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                        generate warnings if the handler files doesn't exists
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 NOTES
   Works like documented in mysql_rm_table(), but don't check
   global_read_lock and don't send_ok packet to server.

 RETURN
  0	ok
  1	error
*/

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int mysql_rm_table_part2_with_lock(THD *thd,
				   TABLE_LIST *tables, bool if_exists,
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				   bool drop_temporary, bool dont_log_query)
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{
  int error;
  thd->mysys_var->current_mutex= &LOCK_open;
  thd->mysys_var->current_cond= &COND_refresh;
  VOID(pthread_mutex_lock(&LOCK_open));

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  error= mysql_rm_table_part2(thd, tables, if_exists, drop_temporary, 1,
			      dont_log_query);
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  pthread_mutex_unlock(&LOCK_open);

  pthread_mutex_lock(&thd->mysys_var->mutex);
  thd->mysys_var->current_mutex= 0;
  thd->mysys_var->current_cond= 0;
  pthread_mutex_unlock(&thd->mysys_var->mutex);
  return error;
}

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/*
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  Execute the drop of a normal or temporary table

  SYNOPSIS
    mysql_rm_table_part2()
    thd			Thread handler
    tables		Tables to drop
    if_exists		If set, don't give an error if table doesn't exists.
			In this case we give an warning of level 'NOTE'
    drop_temporary	Only drop temporary tables
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    drop_view		Allow to delete VIEW .frm
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    dont_log_query	Don't write query to log files. This will also not
			generate warnings if the handler files doesn't exists  
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  TODO:
    When logging to the binary log, we should log
    tmp_tables and transactional tables as separate statements if we
    are in a transaction;  This is needed to get these tables into the
    cached binary log that is only written on COMMIT.

   The current code only writes DROP statements that only uses temporary
   tables to the cache binary log.  This should be ok on most cases, but
   not all.
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 RETURN
   0	ok
   1	Error
   -1	Thread was killed
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*/
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int mysql_rm_table_part2(THD *thd, TABLE_LIST *tables, bool if_exists,
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			 bool drop_temporary, bool drop_view,
			 bool dont_log_query)
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{
  TABLE_LIST *table;
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  char	path[FN_REFLEN], *alias;
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  String wrong_tables;
  int error;
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  bool some_tables_deleted=0, tmp_table_deleted=0, foreign_key_error=0;
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  DBUG_ENTER("mysql_rm_table_part2");

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  LINT_INIT(alias);

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  if (!drop_temporary && lock_table_names(thd, tables))
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    DBUG_RETURN(1);
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  /* Don't give warnings for not found errors, as we already generate notes */
  thd->no_warnings_for_error= 1;

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  for (table= tables; table; table= table->next_local)
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  {
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    char *db=table->db;
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    db_type table_type= DB_TYPE_UNKNOWN;

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    mysql_ha_flush(thd, table, MYSQL_HA_CLOSE_FINAL, TRUE);
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    if (!close_temporary_table(thd, db, table->table_name))
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    {
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      tmp_table_deleted=1;
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      continue;					// removed temporary table
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    }
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    error=0;
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    if (!drop_temporary)
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    {
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      abort_locked_tables(thd, db, table->table_name);
      remove_table_from_cache(thd, db, table->table_name,
	                      RTFC_WAIT_OTHER_THREAD_FLAG |
			      RTFC_CHECK_KILLED_FLAG);
      drop_locked_tables(thd, db, table->table_name);
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      if (thd->killed)
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      {
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        error=-1;
        goto err_with_placeholders;
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      }
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      alias= (lower_case_table_names == 2) ? table->alias : table->table_name;
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      /* remove form file and isam files */
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      build_table_path(path, sizeof(path), db, alias, reg_ext);
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    }
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    if (drop_temporary ||
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       (access(path,F_OK) &&
         ha_create_table_from_engine(thd,db,alias)) ||
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        (!drop_view &&
	 mysql_frm_type(thd, path, &table_type) != FRMTYPE_TABLE))
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    {
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      // Table was not found on disk and table can't be created from engine
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      if (if_exists)
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	push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
			    ER_BAD_TABLE_ERROR, ER(ER_BAD_TABLE_ERROR),
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			    table->table_name);
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      else
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        error= 1;
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    }
    else
    {
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      char *end;
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      if (table_type == DB_TYPE_UNKNOWN)
	mysql_frm_type(thd, path, &table_type);
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      *(end=fn_ext(path))=0;			// Remove extension for delete
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      error= ha_delete_table(thd, table_type, path, table->table_name,
                             !dont_log_query);
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      if ((error == ENOENT || error == HA_ERR_NO_SUCH_TABLE) && 
	  (if_exists || table_type == DB_TYPE_UNKNOWN))
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	error= 0;
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      if (error == HA_ERR_ROW_IS_REFERENCED)
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      {
	/* the table is referenced by a foreign key constraint */
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	foreign_key_error=1;
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      }
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      if (!error || error == ENOENT || error == HA_ERR_NO_SUCH_TABLE)
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      {
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        int new_error;
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	/* Delete the table definition file */
	strmov(end,reg_ext);
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	if (!(new_error=my_delete(path,MYF(MY_WME))))
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        {
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	  some_tables_deleted=1;
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          new_error= Table_triggers_list::drop_all_triggers(thd, db,
                                                            table->table_name);
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        }
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        error|= new_error;
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      }
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    }
    if (error)
    {
      if (wrong_tables.length())
	wrong_tables.append(',');
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      wrong_tables.append(String(table->table_name,system_charset_info));
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    }
  }
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  thd->tmp_table_used= tmp_table_deleted;
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  error= 0;
  if (wrong_tables.length())
  {
    if (!foreign_key_error)
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      my_printf_error(ER_BAD_TABLE_ERROR, ER(ER_BAD_TABLE_ERROR), MYF(0),
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                      wrong_tables.c_ptr());
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    else
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      my_message(ER_ROW_IS_REFERENCED, ER(ER_ROW_IS_REFERENCED), MYF(0));
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    error= 1;
  }

  if (some_tables_deleted || tmp_table_deleted || !error)
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  {
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    query_cache_invalidate3(thd, tables, 0);
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    if (!dont_log_query && mysql_bin_log.is_open())
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    {
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      if (!error)
        thd->clear_error();
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      Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
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      mysql_bin_log.write(&qinfo);
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    }
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  }
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err_with_placeholders:
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  if (!drop_temporary)
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    unlock_table_names(thd, tables, (TABLE_LIST*) 0);
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  thd->no_warnings_for_error= 0;
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  DBUG_RETURN(error);
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}


int quick_rm_table(enum db_type base,const char *db,
		   const char *table_name)
{
  char path[FN_REFLEN];
  int error=0;
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  build_table_path(path, sizeof(path), db, table_name, reg_ext);
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  if (my_delete(path,MYF(0)))
    error=1; /* purecov: inspected */
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  *fn_ext(path)= 0;                             // Remove reg_ext
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  return ha_delete_table(current_thd, base, path, table_name, 0) || error;
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}

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/*
  Sort keys in the following order:
  - PRIMARY KEY
  - UNIQUE keyws where all column are NOT NULL
  - Other UNIQUE keys
  - Normal keys
  - Fulltext keys

  This will make checking for duplicated keys faster and ensure that
  PRIMARY keys are prioritized.
*/

static int sort_keys(KEY *a, KEY *b)
{
  if (a->flags & HA_NOSAME)
  {
    if (!(b->flags & HA_NOSAME))
      return -1;
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    if ((a->flags ^ b->flags) & (HA_NULL_PART_KEY | HA_END_SPACE_KEY))
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    {
      /* Sort NOT NULL keys before other keys */
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      return (a->flags & (HA_NULL_PART_KEY | HA_END_SPACE_KEY)) ? 1 : -1;
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    }
    if (a->name == primary_key_name)
      return -1;
    if (b->name == primary_key_name)
      return 1;
  }
  else if (b->flags & HA_NOSAME)
    return 1;					// Prefer b

  if ((a->flags ^ b->flags) & HA_FULLTEXT)
  {
    return (a->flags & HA_FULLTEXT) ? 1 : -1;
  }
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  /*
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    Prefer original key order.	usable_key_parts contains here
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    the original key position.
  */
  return ((a->usable_key_parts < b->usable_key_parts) ? -1 :
	  (a->usable_key_parts > b->usable_key_parts) ? 1 :
	  0);
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}

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/*
  Check TYPELIB (set or enum) for duplicates
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  SYNOPSIS
    check_duplicates_in_interval()
    set_or_name   "SET" or "ENUM" string for warning message
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    name	  name of the checked column
    typelib	  list of values for the column
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    dup_val_count  returns count of duplicate elements
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  DESCRIPTION
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    This function prints an warning for each value in list
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    which has some duplicates on its right

  RETURN VALUES
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    0             ok
    1             Error
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*/

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bool check_duplicates_in_interval(const char *set_or_name,
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                                  const char *name, TYPELIB *typelib,
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                                  CHARSET_INFO *cs, unsigned int *dup_val_count)
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{
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  TYPELIB tmp= *typelib;
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  const char **cur_value= typelib->type_names;
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  unsigned int *cur_length= typelib->type_lengths;
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  *dup_val_count= 0;  
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  for ( ; tmp.count > 1; cur_value++, cur_length++)
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  {
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    tmp.type_names++;
    tmp.type_lengths++;
    tmp.count--;
    if (find_type2(&tmp, (const char*)*cur_value, *cur_length, cs))
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    {
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      if ((current_thd->variables.sql_mode &
         (MODE_STRICT_TRANS_TABLES | MODE_STRICT_ALL_TABLES)))
      {
        my_error(ER_DUPLICATED_VALUE_IN_TYPE, MYF(0),
                 name,*cur_value,set_or_name);
        return 1;
      }
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      push_warning_printf(current_thd,MYSQL_ERROR::WARN_LEVEL_NOTE,
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			  ER_DUPLICATED_VALUE_IN_TYPE,
			  ER(ER_DUPLICATED_VALUE_IN_TYPE),
			  name,*cur_value,set_or_name);
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      (*dup_val_count)++;
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    }
  }
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  return 0;
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}
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/*
  Check TYPELIB (set or enum) max and total lengths

  SYNOPSIS
    calculate_interval_lengths()
    cs            charset+collation pair of the interval
    typelib       list of values for the column
    max_length    length of the longest item
    tot_length    sum of the item lengths

  DESCRIPTION
    After this function call:
    - ENUM uses max_length
    - SET uses tot_length.

  RETURN VALUES
    void
*/
void calculate_interval_lengths(CHARSET_INFO *cs, TYPELIB *interval,
                                uint32 *max_length, uint32 *tot_length)
{
  const char **pos;
  uint *len;
  *max_length= *tot_length= 0;
  for (pos= interval->type_names, len= interval->type_lengths;
       *pos ; pos++, len++)
  {
    uint length= cs->cset->numchars(cs, *pos, *pos + *len);
    *tot_length+= length;
    set_if_bigger(*max_length, (uint32)length);
  }
}


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/*
  Prepare a create_table instance for packing

  SYNOPSIS
    prepare_create_field()
    sql_field     field to prepare for packing
    blob_columns  count for BLOBs
    timestamps    count for timestamps
    table_flags   table flags

  DESCRIPTION
    This function prepares a create_field instance.
    Fields such as pack_flag are valid after this call.

  RETURN VALUES
   0	ok
   1	Error
*/

int prepare_create_field(create_field *sql_field, 
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			 uint *blob_columns, 
			 int *timestamps, int *timestamps_with_niladic,
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			 uint table_flags)
{
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  unsigned int dup_val_count;
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  DBUG_ENTER("prepare_field");
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  /*
    This code came from mysql_prepare_table.
    Indent preserved to make patching easier
  */
  DBUG_ASSERT(sql_field->charset);

  switch (sql_field->sql_type) {
  case FIELD_TYPE_BLOB:
  case FIELD_TYPE_MEDIUM_BLOB:
  case FIELD_TYPE_TINY_BLOB:
  case FIELD_TYPE_LONG_BLOB:
    sql_field->pack_flag=FIELDFLAG_BLOB |
      pack_length_to_packflag(sql_field->pack_length -
                              portable_sizeof_char_ptr);
    if (sql_field->charset->state & MY_CS_BINSORT)
      sql_field->pack_flag|=FIELDFLAG_BINARY;
    sql_field->length=8;			// Unireg field length
    sql_field->unireg_check=Field::BLOB_FIELD;
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    (*blob_columns)++;
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    break;
  case FIELD_TYPE_GEOMETRY:
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#ifdef HAVE_SPATIAL
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    if (!(table_flags & HA_CAN_GEOMETRY))
    {
      my_printf_error(ER_CHECK_NOT_IMPLEMENTED, ER(ER_CHECK_NOT_IMPLEMENTED),
                      MYF(0), "GEOMETRY");
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      DBUG_RETURN(1);
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    }
    sql_field->pack_flag=FIELDFLAG_GEOM |
      pack_length_to_packflag(sql_field->pack_length -
                              portable_sizeof_char_ptr);
    if (sql_field->charset->state & MY_CS_BINSORT)
      sql_field->pack_flag|=FIELDFLAG_BINARY;
    sql_field->length=8;			// Unireg field length
    sql_field->unireg_check=Field::BLOB_FIELD;
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    (*blob_columns)++;
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    break;
#else
    my_printf_error(ER_FEATURE_DISABLED,ER(ER_FEATURE_DISABLED), MYF(0),
                    sym_group_geom.name, sym_group_geom.needed_define);
    DBUG_RETURN(1);
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#endif /*HAVE_SPATIAL*/
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  case MYSQL_TYPE_VARCHAR:
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#ifndef QQ_ALL_HANDLERS_SUPPORT_VARCHAR
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    if (table_flags & HA_NO_VARCHAR)
    {
      /* convert VARCHAR to CHAR because handler is not yet up to date */
      sql_field->sql_type=    MYSQL_TYPE_VAR_STRING;
      sql_field->pack_length= calc_pack_length(sql_field->sql_type,
                                               (uint) sql_field->length);
      if ((sql_field->length / sql_field->charset->mbmaxlen) >
          MAX_FIELD_CHARLENGTH)
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      {
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        my_printf_error(ER_TOO_BIG_FIELDLENGTH, ER(ER_TOO_BIG_FIELDLENGTH),
                        MYF(0), sql_field->field_name, MAX_FIELD_CHARLENGTH);
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        DBUG_RETURN(1);
      }
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    }
#endif
    /* fall through */
  case FIELD_TYPE_STRING:
    sql_field->pack_flag=0;
    if (sql_field->charset->state & MY_CS_BINSORT)
      sql_field->pack_flag|=FIELDFLAG_BINARY;
    break;
  case FIELD_TYPE_ENUM:
    sql_field->pack_flag=pack_length_to_packflag(sql_field->pack_length) |
      FIELDFLAG_INTERVAL;
    if (sql_field->charset->state & MY_CS_BINSORT)
      sql_field->pack_flag|=FIELDFLAG_BINARY;
    sql_field->unireg_check=Field::INTERVAL_FIELD;
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    if (check_duplicates_in_interval("ENUM",sql_field->field_name,
                                     sql_field->interval,
                                     sql_field->charset, &dup_val_count))
      DBUG_RETURN(1);
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    break;
  case FIELD_TYPE_SET:
    sql_field->pack_flag=pack_length_to_packflag(sql_field->pack_length) |
      FIELDFLAG_BITFIELD;
    if (sql_field->charset->state & MY_CS_BINSORT)
      sql_field->pack_flag|=FIELDFLAG_BINARY;
    sql_field->unireg_check=Field::BIT_FIELD;
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    if (check_duplicates_in_interval("SET",sql_field->field_name,
                                     sql_field->interval,
                                     sql_field->charset, &dup_val_count))
      DBUG_RETURN(1);
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    /* Check that count of unique members is not more then 64 */
    if (sql_field->interval->count -  dup_val_count > sizeof(longlong)*8)
    {
       my_error(ER_TOO_BIG_SET, MYF(0), sql_field->field_name);
       DBUG_RETURN(1);
    }
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    break;
  case FIELD_TYPE_DATE:			// Rest of string types
  case FIELD_TYPE_NEWDATE:
  case FIELD_TYPE_TIME:
  case FIELD_TYPE_DATETIME:
  case FIELD_TYPE_NULL:
    sql_field->pack_flag=f_settype((uint) sql_field->sql_type);
    break;
  case FIELD_TYPE_BIT:
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    /* 
      We have sql_field->pack_flag already set here, see mysql_prepare_table().
    */
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    break;
  case FIELD_TYPE_NEWDECIMAL:
    sql_field->pack_flag=(FIELDFLAG_NUMBER |
                          (sql_field->flags & UNSIGNED_FLAG ? 0 :
                           FIELDFLAG_DECIMAL) |
                          (sql_field->flags & ZEROFILL_FLAG ?
                           FIELDFLAG_ZEROFILL : 0) |
                          (sql_field->decimals << FIELDFLAG_DEC_SHIFT));
    break;
  case FIELD_TYPE_TIMESTAMP:
    /* We should replace old TIMESTAMP fields with their newer analogs */
    if (sql_field->unireg_check == Field::TIMESTAMP_OLD_FIELD)
    {
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      if (!*timestamps)
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      {
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        sql_field->unireg_check= Field::TIMESTAMP_DNUN_FIELD;
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        (*timestamps_with_niladic)++;
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      }
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      else
        sql_field->unireg_check= Field::NONE;
    }
    else if (sql_field->unireg_check != Field::NONE)
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      (*timestamps_with_niladic)++;
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    (*timestamps)++;
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    /* fall-through */
  default:
    sql_field->pack_flag=(FIELDFLAG_NUMBER |
                          (sql_field->flags & UNSIGNED_FLAG ? 0 :
                           FIELDFLAG_DECIMAL) |
                          (sql_field->flags & ZEROFILL_FLAG ?
                           FIELDFLAG_ZEROFILL : 0) |
                          f_settype((uint) sql_field->sql_type) |
                          (sql_field->decimals << FIELDFLAG_DEC_SHIFT));
    break;
  }
  if (!(sql_field->flags & NOT_NULL_FLAG))
    sql_field->pack_flag|= FIELDFLAG_MAYBE_NULL;
  if (sql_field->flags & NO_DEFAULT_VALUE_FLAG)
    sql_field->pack_flag|= FIELDFLAG_NO_DEFAULT;
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  DBUG_RETURN(0);
}

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/*
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  Preparation for table creation
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  SYNOPSIS
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    mysql_prepare_table()
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    thd			Thread object
    create_info		Create information (like MAX_ROWS)
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    alter_info          List of columns and indexes to create
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  DESCRIPTION
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    Prepares the table and key structures for table creation.
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  NOTES
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    sets create_info->varchar if the table has a varchar
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  RETURN VALUES
    0	ok
    -1	error
*/
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static int mysql_prepare_table(THD *thd, HA_CREATE_INFO *create_info,
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                               Alter_info *alter_info,
                               bool tmp_table,
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                               uint *db_options,
                               handler *file, KEY **key_info_buffer,
                               uint *key_count, int select_field_count)
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{
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  const char	*key_name;
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  create_field	*sql_field,*dup_field;
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  uint		field,null_fields,blob_columns,max_key_length;
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  ulong		record_offset= 0;
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  KEY		*key_info;
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  KEY_PART_INFO *key_part_info;
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  int		timestamps= 0, timestamps_with_niladic= 0;
  int		field_no,dup_no;
  int		select_field_pos,auto_increment=0;
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  List_iterator<create_field> it(alter_info->create_list);
  List_iterator<create_field> it2(alter_info->create_list);
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  uint total_uneven_bit_length= 0;
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  DBUG_ENTER("mysql_prepare_table");
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  select_field_pos= alter_info->create_list.elements - select_field_count;
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  null_fields=blob_columns=0;
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  create_info->varchar= 0;
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  max_key_length= file->max_key_length();
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  for (field_no=0; (sql_field=it++) ; field_no++)
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  {
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    CHARSET_INFO *save_cs;

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    /*
      Initialize length from its original value (number of characters),
      which was set in the parser. This is necessary if we're
      executing a prepared statement for the second time.
    */
    sql_field->length= sql_field->char_length;
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    if (!sql_field->charset)
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      sql_field->charset= create_info->default_table_charset;
    /*
      table_charset is set in ALTER TABLE if we want change character set
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      for all varchar/char columns.
      But the table charset must not affect the BLOB fields, so don't
      allow to change my_charset_bin to somethig else.
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    */
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    if (create_info->table_charset && sql_field->charset != &my_charset_bin)
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      sql_field->charset= create_info->table_charset;
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    save_cs= sql_field->charset;
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    if ((sql_field->flags & BINCMP_FLAG) &&
	!(sql_field->charset= get_charset_by_csname(sql_field->charset->csname,
						    MY_CS_BINSORT,MYF(0))))
    {
      char tmp[64];
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      strmake(strmake(tmp, save_cs->csname, sizeof(tmp)-4),
              STRING_WITH_LEN("_bin"));
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      my_error(ER_UNKNOWN_COLLATION, MYF(0), tmp);
      DBUG_RETURN(-1);
    }
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    /*
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      Convert the default value from client character
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      set into the column character set if necessary.
    */
    if (sql_field->def && 
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        save_cs != sql_field->def->collation.collation &&
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        (sql_field->sql_type == FIELD_TYPE_VAR_STRING ||
         sql_field->sql_type == FIELD_TYPE_STRING ||
         sql_field->sql_type == FIELD_TYPE_SET ||
         sql_field->sql_type == FIELD_TYPE_ENUM))
    {
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      Query_arena backup_arena;
      bool need_to_change_arena= !thd->stmt_arena->is_conventional();
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      if (need_to_change_arena)
      {
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        /* Asser that we don't do that at every PS execute */
        DBUG_ASSERT(thd->stmt_arena->is_first_stmt_execute() ||
                    thd->stmt_arena->is_first_sp_execute());
        thd->set_n_backup_active_arena(thd->stmt_arena, &backup_arena);
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      }

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      sql_field->def= sql_field->def->safe_charset_converter(save_cs);
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      if (need_to_change_arena)
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        thd->restore_active_arena(thd->stmt_arena, &backup_arena);
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      if (sql_field->def == NULL)
      {
        /* Could not convert */
        my_error(ER_INVALID_DEFAULT, MYF(0), sql_field->field_name);
        DBUG_RETURN(-1);
      }
    }

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    if (sql_field->sql_type == FIELD_TYPE_SET ||
        sql_field->sql_type == FIELD_TYPE_ENUM)
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    {
      uint32 dummy;
      CHARSET_INFO *cs= sql_field->charset;
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      TYPELIB *interval= sql_field->interval;
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      /*
        Create typelib from interval_list, and if necessary
        convert strings from client character set to the
        column character set.
      */
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      if (!interval)
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      {
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        /*
          Create the typelib in prepared statement memory if we're
          executing one.
        */
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        MEM_ROOT *stmt_root= thd->stmt_arena->mem_root;
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        interval= sql_field->interval= typelib(stmt_root,
                                               sql_field->interval_list);
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        List_iterator<String> int_it(sql_field->interval_list);
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        String conv, *tmp;
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        char comma_buf[2];
        int comma_length= cs->cset->wc_mb(cs, ',', (uchar*) comma_buf,
                                          (uchar*) comma_buf + 
                                          sizeof(comma_buf));
        DBUG_ASSERT(comma_length > 0);
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        for (uint i= 0; (tmp= int_it++); i++)
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        {
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          uint lengthsp;
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          if (String::needs_conversion(tmp->length(), tmp->charset(),
                                       cs, &dummy))
          {
            uint cnv_errs;
            conv.copy(tmp->ptr(), tmp->length(), tmp->charset(), cs, &cnv_errs);
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            interval->type_names[i]= strmake_root(stmt_root, conv.ptr(),
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                                                  conv.length());
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            interval->type_lengths[i]= conv.length();
          }
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          // Strip trailing spaces.
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          lengthsp= cs->cset->lengthsp(cs, interval->type_names[i],
                                       interval->type_lengths[i]);
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          interval->type_lengths[i]= lengthsp;
          ((uchar *)interval->type_names[i])[lengthsp]= '\0';
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          if (sql_field->sql_type == FIELD_TYPE_SET)
          {
            if (cs->coll->instr(cs, interval->type_names[i], 
                                interval->type_lengths[i], 
                                comma_buf, comma_length, NULL, 0))
            {
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              my_error(ER_ILLEGAL_VALUE_FOR_TYPE, MYF(0), "set", tmp->ptr());
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              DBUG_RETURN(-1);
            }
          }
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        }
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        sql_field->interval_list.empty(); // Don't need interval_list anymore
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      }

      if (sql_field->sql_type == FIELD_TYPE_SET)
      {
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        uint32 field_length;
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        if (sql_field->def != NULL)
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        {
          char *not_used;
          uint not_used2;
          bool not_found= 0;
          String str, *def= sql_field->def->val_str(&str);
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          if (def == NULL) /* SQL "NULL" maps to NULL */
          {
            if ((sql_field->flags & NOT_NULL_FLAG) != 0)
            {
              my_error(ER_INVALID_DEFAULT, MYF(0), sql_field->field_name);
              DBUG_RETURN(-1);
            }

            /* else, NULL is an allowed value */
            (void) find_set(interval, NULL, 0,
                            cs, &not_used, &not_used2, &not_found);
          }
          else /* not NULL */
          {
            (void) find_set(interval, def->ptr(), def->length(),
                            cs, &not_used, &not_used2, &not_found);
          }

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          if (not_found)
          {
            my_error(ER_INVALID_DEFAULT, MYF(0), sql_field->field_name);
            DBUG_RETURN(-1);
          }
        }
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        calculate_interval_lengths(cs, interval, &dummy, &field_length);
        sql_field->length= field_length + (interval->count - 1);
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      }
      else  /* FIELD_TYPE_ENUM */
      {
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        uint32 field_length;
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        DBUG_ASSERT(sql_field->sql_type == FIELD_TYPE_ENUM);
        if (sql_field->def != NULL)
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        {
          String str, *def= sql_field->def->val_str(&str);
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          if (def == NULL) /* SQL "NULL" maps to NULL */
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          {
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            if ((sql_field->flags & NOT_NULL_FLAG) != 0)
            {
              my_error(ER_INVALID_DEFAULT, MYF(0), sql_field->field_name);
              DBUG_RETURN(-1);
            }

            /* else, the defaults yield the correct length for NULLs. */
          } 
          else /* not NULL */
          {
            def->length(cs->cset->lengthsp(cs, def->ptr(), def->length()));
            if (find_type2(interval, def->ptr(), def->length(), cs) == 0) /* not found */
            {
              my_error(ER_INVALID_DEFAULT, MYF(0), sql_field->field_name);
              DBUG_RETURN(-1);
            }
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          }
        }
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        calculate_interval_lengths(cs, interval, &field_length, &dummy);
        sql_field->length= field_length;
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      }
      set_if_smaller(sql_field->length, MAX_FIELD_WIDTH-1);
    }

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    if (sql_field->sql_type == FIELD_TYPE_BIT)
    { 
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      sql_field->pack_flag= FIELDFLAG_NUMBER;
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      if (file->table_flags() & HA_CAN_BIT_FIELD)
        total_uneven_bit_length+= sql_field->length & 7;
      else
        sql_field->pack_flag|= FIELDFLAG_TREAT_BIT_AS_CHAR;
    }

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    sql_field->create_length_to_internal_length();
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    if (prepare_blob_field(thd, sql_field))
      DBUG_RETURN(-1);
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    if (!(sql_field->flags & NOT_NULL_FLAG))
      null_fields++;
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    if (check_column_name(sql_field->field_name))
    {
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      my_error(ER_WRONG_COLUMN_NAME, MYF(0), sql_field->field_name);
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      DBUG_RETURN(-1);
    }
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    /* Check if we have used the same field name before */
    for (dup_no=0; (dup_field=it2++) != sql_field; dup_no++)
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    {
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      if (my_strcasecmp(system_charset_info,
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			sql_field->field_name,
			dup_field->field_name) == 0)
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      {
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	/*
	  If this was a CREATE ... SELECT statement, accept a field
	  redefinition if we are changing a field in the SELECT part
	*/
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	if (field_no < select_field_pos || dup_no >= select_field_pos)
	{
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	  my_error(ER_DUP_FIELDNAME, MYF(0), sql_field->field_name);
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	  DBUG_RETURN(-1);
	}
	else
	{
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	  /* Field redefined */
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	  sql_field->def=		dup_field->def;
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	  sql_field->sql_type=		dup_field->sql_type;
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	  sql_field->charset=		(dup_field->charset ?
					 dup_field->charset :
					 create_info->default_table_charset);
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	  sql_field->length=		dup_field->char_length;
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          sql_field->pack_length=	dup_field->pack_length;
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          sql_field->key_length=	dup_field->key_length;
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	  sql_field->decimals=		dup_field->decimals;
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	  sql_field->create_length_to_internal_length();
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	  sql_field->unireg_check=	dup_field->unireg_check;
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          /* 
            We're making one field from two, the result field will have
            dup_field->flags as flags. If we've incremented null_fields
            because of sql_field->flags, decrement it back.
          */
          if (!(sql_field->flags & NOT_NULL_FLAG))
            null_fields--;
	  sql_field->flags=		dup_field->flags;
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          sql_field->interval=          dup_field->interval;
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	  it2.remove();			// Remove first (create) definition
	  select_field_pos--;
	  break;
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	}
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      }
    }
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    /* Don't pack rows in old tables if the user has requested this */
    if ((sql_field->flags & BLOB_FLAG) ||
	sql_field->sql_type == MYSQL_TYPE_VARCHAR &&
	create_info->row_type != ROW_TYPE_FIXED)
980
      (*db_options)|= HA_OPTION_PACK_RECORD;
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    it2.rewind();
  }
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  /* record_offset will be increased with 'length-of-null-bits' later */
  record_offset= 0;
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  null_fields+= total_uneven_bit_length;
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  it.rewind();
  while ((sql_field=it++))
  {
991
    DBUG_ASSERT(sql_field->charset != 0);
992

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    if (prepare_create_field(sql_field, &blob_columns, 
			     &timestamps, &timestamps_with_niladic,
995
			     file->table_flags()))
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      DBUG_RETURN(-1);
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    if (sql_field->sql_type == MYSQL_TYPE_VARCHAR)
998
      create_info->varchar= 1;
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    sql_field->offset= record_offset;
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    if (MTYP_TYPENR(sql_field->unireg_check) == Field::NEXT_NUMBER)
      auto_increment++;
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    record_offset+= sql_field->pack_length;
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  }
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  if (timestamps_with_niladic > 1)
  {
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    my_message(ER_TOO_MUCH_AUTO_TIMESTAMP_COLS,
               ER(ER_TOO_MUCH_AUTO_TIMESTAMP_COLS), MYF(0));
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    DBUG_RETURN(-1);
  }
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  if (auto_increment > 1)
  {
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    my_message(ER_WRONG_AUTO_KEY, ER(ER_WRONG_AUTO_KEY), MYF(0));
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    DBUG_RETURN(-1);
  }
  if (auto_increment &&
1016
      (file->table_flags() & HA_NO_AUTO_INCREMENT))
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  {
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    my_message(ER_TABLE_CANT_HANDLE_AUTO_INCREMENT,
               ER(ER_TABLE_CANT_HANDLE_AUTO_INCREMENT), MYF(0));
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    DBUG_RETURN(-1);
  }

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  if (blob_columns && (file->table_flags() & HA_NO_BLOBS))
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  {
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    my_message(ER_TABLE_CANT_HANDLE_BLOB, ER(ER_TABLE_CANT_HANDLE_BLOB),
               MYF(0));
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    DBUG_RETURN(-1);
  }

  /* Create keys */
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  List_iterator<Key> key_iterator(alter_info->key_list);
  List_iterator<Key> key_iterator2(alter_info->key_list);
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  uint key_parts=0, fk_key_count=0;
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  bool primary_key=0,unique_key=0;
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  Key *key, *key2;
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  uint tmp, key_number;
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  /* special marker for keys to be ignored */
  static char ignore_key[1];
1040

1041
  /* Calculate number of key segements */
1042
  *key_count= 0;
1043

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  while ((key=key_iterator++))
  {
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    if (key->type == Key::FOREIGN_KEY)
    {
      fk_key_count++;
      foreign_key *fk_key= (foreign_key*) key;
      if (fk_key->ref_columns.elements &&
	  fk_key->ref_columns.elements != fk_key->columns.elements)
      {
1053 1054 1055
        my_error(ER_WRONG_FK_DEF, MYF(0),
                 (fk_key->name ?  fk_key->name : "foreign key without name"),
                 ER(ER_KEY_REF_DO_NOT_MATCH_TABLE_REF));
1056 1057 1058 1059
	DBUG_RETURN(-1);
      }
      continue;
    }
1060
    (*key_count)++;
1061
    tmp=file->max_key_parts();
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1062 1063 1064 1065 1066
    if (key->columns.elements > tmp)
    {
      my_error(ER_TOO_MANY_KEY_PARTS,MYF(0),tmp);
      DBUG_RETURN(-1);
    }
1067
    if (key->name && strlen(key->name) > NAME_LEN)
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1068
    {
1069
      my_error(ER_TOO_LONG_IDENT, MYF(0), key->name);
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1070 1071
      DBUG_RETURN(-1);
    }
1072
    key_iterator2.rewind ();
1073
    if (key->type != Key::FOREIGN_KEY)
1074
    {
1075
      while ((key2 = key_iterator2++) != key)
1076
      {
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1077
	/*
1078 1079 1080
          foreign_key_prefix(key, key2) returns 0 if key or key2, or both, is
          'generated', and a generated key is a prefix of the other key.
          Then we do not need the generated shorter key.
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1081
        */
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        if ((key2->type != Key::FOREIGN_KEY &&
             key2->name != ignore_key &&
             !foreign_key_prefix(key, key2)))
1085
        {
1086
          /* TODO: issue warning message */
1087 1088 1089 1090 1091 1092 1093
          /* mark that the generated key should be ignored */
          if (!key2->generated ||
              (key->generated && key->columns.elements <
               key2->columns.elements))
            key->name= ignore_key;
          else
          {
1094 1095 1096
            key2->name= ignore_key;
            key_parts-= key2->columns.elements;
            (*key_count)--;
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          }
          break;
        }
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      }
    }
    if (key->name != ignore_key)
      key_parts+=key->columns.elements;
    else
      (*key_count)--;
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    if (key->name && !tmp_table &&
	!my_strcasecmp(system_charset_info,key->name,primary_key_name))
    {
      my_error(ER_WRONG_NAME_FOR_INDEX, MYF(0), key->name);
      DBUG_RETURN(-1);
    }
1112
  }
1113
  tmp=file->max_keys();
1114
  if (*key_count > tmp)
1115 1116 1117 1118
  {
    my_error(ER_TOO_MANY_KEYS,MYF(0),tmp);
    DBUG_RETURN(-1);
  }
1119

1120
  (*key_info_buffer) = key_info= (KEY*) sql_calloc(sizeof(KEY)* *key_count);
1121
  key_part_info=(KEY_PART_INFO*) sql_calloc(sizeof(KEY_PART_INFO)*key_parts);
1122
  if (!*key_info_buffer || ! key_part_info)
1123 1124
    DBUG_RETURN(-1);				// Out of memory

1125
  key_iterator.rewind();
1126
  key_number=0;
1127
  for (; (key=key_iterator++) ; key_number++)
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  {
    uint key_length=0;
    key_part_spec *column;

1132 1133 1134 1135 1136 1137 1138 1139 1140 1141
    if (key->name == ignore_key)
    {
      /* ignore redundant keys */
      do
	key=key_iterator++;
      while (key && key->name == ignore_key);
      if (!key)
	break;
    }

1142
    switch(key->type){
1143
    case Key::MULTIPLE:
1144
	key_info->flags= 0;
1145
	break;
1146
    case Key::FULLTEXT:
1147
	key_info->flags= HA_FULLTEXT;
1148
	break;
1149
    case Key::SPATIAL:
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#ifdef HAVE_SPATIAL
1151
	key_info->flags= HA_SPATIAL;
1152
	break;
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#else
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	my_error(ER_FEATURE_DISABLED, MYF(0),
                 sym_group_geom.name, sym_group_geom.needed_define);
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	DBUG_RETURN(-1);
#endif
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    case Key::FOREIGN_KEY:
      key_number--;				// Skip this key
      continue;
    default:
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      key_info->flags = HA_NOSAME;
      break;
1164
    }
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    if (key->generated)
      key_info->flags|= HA_GENERATED_KEY;
1167

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    key_info->key_parts=(uint8) key->columns.elements;
    key_info->key_part=key_part_info;
1170
    key_info->usable_key_parts= key_number;
1171
    key_info->algorithm=key->algorithm;
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1173 1174
    if (key->type == Key::FULLTEXT)
    {
1175
      if (!(file->table_flags() & HA_CAN_FULLTEXT))
1176
      {
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1177 1178
	my_message(ER_TABLE_CANT_HANDLE_FT, ER(ER_TABLE_CANT_HANDLE_FT),
                   MYF(0));
1179
	DBUG_RETURN(-1);
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      }
    }
1182 1183 1184
    /*
       Make SPATIAL to be RTREE by default
       SPATIAL only on BLOB or at least BINARY, this
1185
       actually should be replaced by special GEOM type
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       in near future when new frm file is ready
       checking for proper key parts number:
    */
1189

1190
    /* TODO: Add proper checks if handler supports key_type and algorithm */
1191
    if (key_info->flags & HA_SPATIAL)
1192
    {
1193 1194 1195 1196 1197 1198
      if (!(file->table_flags() & HA_CAN_RTREEKEYS))
      {
        my_message(ER_TABLE_CANT_HANDLE_SPKEYS, ER(ER_TABLE_CANT_HANDLE_SPKEYS),
                   MYF(0));
        DBUG_RETURN(-1);
      }
1199 1200
      if (key_info->key_parts != 1)
      {
1201
	my_error(ER_WRONG_ARGUMENTS, MYF(0), "SPATIAL INDEX");
1202
	DBUG_RETURN(-1);
1203
      }
1204
    }
1205
    else if (key_info->algorithm == HA_KEY_ALG_RTREE)
1206
    {
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#ifdef HAVE_RTREE_KEYS
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      if ((key_info->key_parts & 1) == 1)
      {
1210
	my_error(ER_WRONG_ARGUMENTS, MYF(0), "RTREE INDEX");
1211
	DBUG_RETURN(-1);
1212
      }
1213
      /* TODO: To be deleted */
1214
      my_error(ER_NOT_SUPPORTED_YET, MYF(0), "RTREE INDEX");
1215
      DBUG_RETURN(-1);
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1216
#else
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      my_error(ER_FEATURE_DISABLED, MYF(0),
               sym_group_rtree.name, sym_group_rtree.needed_define);
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1219 1220
      DBUG_RETURN(-1);
#endif
1221
    }
1222

1223
    List_iterator<key_part_spec> cols(key->columns), cols2(key->columns);
1224
    CHARSET_INFO *ft_key_charset=0;  // for FULLTEXT
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1225 1226
    for (uint column_nr=0 ; (column=cols++) ; column_nr++)
    {
1227
      uint length;
1228 1229
      key_part_spec *dup_column;

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      it.rewind();
      field=0;
      while ((sql_field=it++) &&
1233
	     my_strcasecmp(system_charset_info,
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			   column->field_name,
			   sql_field->field_name))
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	field++;
      if (!sql_field)
      {
1239
	my_error(ER_KEY_COLUMN_DOES_NOT_EXITS, MYF(0), column->field_name);
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	DBUG_RETURN(-1);
      }
1242
      while ((dup_column= cols2++) != column)
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      {
        if (!my_strcasecmp(system_charset_info,
	     	           column->field_name, dup_column->field_name))
	{
	  my_printf_error(ER_DUP_FIELDNAME,
			  ER(ER_DUP_FIELDNAME),MYF(0),
			  column->field_name);
	  DBUG_RETURN(-1);
	}
      }
      cols2.rewind();
1254
      if (key->type == Key::FULLTEXT)
1255
      {
1256 1257
	if ((sql_field->sql_type != MYSQL_TYPE_STRING &&
	     sql_field->sql_type != MYSQL_TYPE_VARCHAR &&
1258 1259
	     !f_is_blob(sql_field->pack_flag)) ||
	    sql_field->charset == &my_charset_bin ||
1260
	    sql_field->charset->mbminlen > 1 || // ucs2 doesn't work yet
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	    (ft_key_charset && sql_field->charset != ft_key_charset))
	{
1263
	    my_error(ER_BAD_FT_COLUMN, MYF(0), column->field_name);
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	    DBUG_RETURN(-1);
	}
	ft_key_charset=sql_field->charset;
	/*
	  for fulltext keys keyseg length is 1 for blobs (it's ignored in ft
	  code anyway, and 0 (set to column width later) for char's. it has
	  to be correct col width for char's, as char data are not prefixed
	  with length (unlike blobs, where ft code takes data length from a
	  data prefix, ignoring column->length).
	*/
	column->length=test(f_is_blob(sql_field->pack_flag));
1275
      }
1276
      else
1277
      {
1278 1279
	column->length*= sql_field->charset->mbmaxlen;

1280 1281
	if (f_is_blob(sql_field->pack_flag) ||
            (f_is_geom(sql_field->pack_flag) && key->type != Key::SPATIAL))
1282
	{
1283
	  if (!(file->table_flags() & HA_CAN_INDEX_BLOBS))
1284
	  {
1285
	    my_error(ER_BLOB_USED_AS_KEY, MYF(0), column->field_name);
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	    DBUG_RETURN(-1);
	  }
1288 1289 1290
          if (f_is_geom(sql_field->pack_flag) && sql_field->geom_type ==
              Field::GEOM_POINT)
            column->length= 21;
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	  if (!column->length)
	  {
1293
	    my_error(ER_BLOB_KEY_WITHOUT_LENGTH, MYF(0), column->field_name);
1294 1295 1296
	    DBUG_RETURN(-1);
	  }
	}
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1297
#ifdef HAVE_SPATIAL
1298
	if (key->type == Key::SPATIAL)
1299
	{
1300
	  if (!column->length)
1301 1302
	  {
	    /*
1303 1304
              4 is: (Xmin,Xmax,Ymin,Ymax), this is for 2D case
              Lately we'll extend this code to support more dimensions
1305
	    */
1306
	    column->length= 4*sizeof(double);
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	  }
	}
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1309
#endif
1310 1311 1312 1313 1314 1315 1316
	if (!(sql_field->flags & NOT_NULL_FLAG))
	{
	  if (key->type == Key::PRIMARY)
	  {
	    /* Implicitly set primary key fields to NOT NULL for ISO conf. */
	    sql_field->flags|= NOT_NULL_FLAG;
	    sql_field->pack_flag&= ~FIELDFLAG_MAYBE_NULL;
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1317
            null_fields--;
1318 1319 1320
	  }
	  else
	     key_info->flags|= HA_NULL_PART_KEY;
1321
	  if (!(file->table_flags() & HA_NULL_IN_KEY))
1322
	  {
1323
	    my_error(ER_NULL_COLUMN_IN_INDEX, MYF(0), column->field_name);
1324 1325 1326 1327
	    DBUG_RETURN(-1);
	  }
	  if (key->type == Key::SPATIAL)
	  {
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1328 1329
	    my_message(ER_SPATIAL_CANT_HAVE_NULL,
                       ER(ER_SPATIAL_CANT_HAVE_NULL), MYF(0));
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	    DBUG_RETURN(-1);
	  }
	}
	if (MTYP_TYPENR(sql_field->unireg_check) == Field::NEXT_NUMBER)
	{
	  if (column_nr == 0 || (file->table_flags() & HA_AUTO_PART_KEY))
	    auto_increment--;			// Field is used
	}
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1338
      }
1339

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      key_part_info->fieldnr= field;
      key_part_info->offset=  (uint16) sql_field->offset;
      key_part_info->key_type=sql_field->pack_flag;
1343 1344
      length= sql_field->key_length;

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      if (column->length)
      {
	if (f_is_blob(sql_field->pack_flag))
	{
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1349
	  if ((length=column->length) > max_key_length ||
1350
	      length > file->max_key_part_length())
1351
	  {
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1352
	    length=min(max_key_length, file->max_key_part_length());
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	    if (key->type == Key::MULTIPLE)
	    {
	      /* not a critical problem */
	      char warn_buff[MYSQL_ERRMSG_SIZE];
	      my_snprintf(warn_buff, sizeof(warn_buff), ER(ER_TOO_LONG_KEY),
			  length);
	      push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
			   ER_TOO_LONG_KEY, warn_buff);
1361 1362
              /* Align key length to multibyte char boundary */
              length-= length % sql_field->charset->mbmaxlen;
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	    }
	    else
	    {
	      my_error(ER_TOO_LONG_KEY,MYF(0),length);
	      DBUG_RETURN(-1);
	    }
	  }
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1370
	}
1371
	else if (!f_is_geom(sql_field->pack_flag) &&
1372
		  (column->length > length ||
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                   !Field::type_can_have_key_part (sql_field->sql_type) ||
1374 1375 1376 1377 1378
		   ((f_is_packed(sql_field->pack_flag) ||
		     ((file->table_flags() & HA_NO_PREFIX_CHAR_KEYS) &&
		      (key_info->flags & HA_NOSAME))) &&
		    column->length != length)))
	{
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1379
	  my_message(ER_WRONG_SUB_KEY, ER(ER_WRONG_SUB_KEY), MYF(0));
1380 1381 1382 1383
	  DBUG_RETURN(-1);
	}
	else if (!(file->table_flags() & HA_NO_PREFIX_CHAR_KEYS))
	  length=column->length;
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1384 1385 1386
      }
      else if (length == 0)
      {
1387
	my_error(ER_WRONG_KEY_COLUMN, MYF(0), column->field_name);
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1388 1389
	  DBUG_RETURN(-1);
      }
1390
      if (length > file->max_key_part_length() && key->type != Key::FULLTEXT)
1391
      {
1392
        length= file->max_key_part_length();
1393 1394 1395 1396 1397 1398 1399 1400
	if (key->type == Key::MULTIPLE)
	{
	  /* not a critical problem */
	  char warn_buff[MYSQL_ERRMSG_SIZE];
	  my_snprintf(warn_buff, sizeof(warn_buff), ER(ER_TOO_LONG_KEY),
		      length);
	  push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
		       ER_TOO_LONG_KEY, warn_buff);
1401 1402
          /* Align key length to multibyte char boundary */
          length-= length % sql_field->charset->mbmaxlen;
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	}
	else
	{
	  my_error(ER_TOO_LONG_KEY,MYF(0),length);
	  DBUG_RETURN(-1);
	}
1409 1410
      }
      key_part_info->length=(uint16) length;
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1411
      /* Use packed keys for long strings on the first column */
1412
      if (!((*db_options) & HA_OPTION_NO_PACK_KEYS) &&
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1413
	  (length >= KEY_DEFAULT_PACK_LENGTH &&
1414 1415
	   (sql_field->sql_type == MYSQL_TYPE_STRING ||
	    sql_field->sql_type == MYSQL_TYPE_VARCHAR ||
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1416 1417
	    sql_field->pack_flag & FIELDFLAG_BLOB)))
      {
1418 1419 1420
	if (column_nr == 0 && (sql_field->pack_flag & FIELDFLAG_BLOB) ||
            sql_field->sql_type == MYSQL_TYPE_VARCHAR)
	  key_info->flags|= HA_BINARY_PACK_KEY | HA_VAR_LENGTH_KEY;
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1421 1422 1423 1424 1425 1426 1427 1428 1429 1430
	else
	  key_info->flags|= HA_PACK_KEY;
      }
      key_length+=length;
      key_part_info++;

      /* Create the key name based on the first column (if not given) */
      if (column_nr == 0)
      {
	if (key->type == Key::PRIMARY)
1431 1432 1433
	{
	  if (primary_key)
	  {
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1434 1435
	    my_message(ER_MULTIPLE_PRI_KEY, ER(ER_MULTIPLE_PRI_KEY),
                       MYF(0));
1436 1437 1438 1439 1440
	    DBUG_RETURN(-1);
	  }
	  key_name=primary_key_name;
	  primary_key=1;
	}
1441
	else if (!(key_name = key->name))
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1442
	  key_name=make_unique_key_name(sql_field->field_name,
1443 1444
					*key_info_buffer, key_info);
	if (check_if_keyname_exists(key_name, *key_info_buffer, key_info))
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1445
	{
1446
	  my_error(ER_DUP_KEYNAME, MYF(0), key_name);
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1447 1448 1449 1450 1451
	  DBUG_RETURN(-1);
	}
	key_info->name=(char*) key_name;
      }
    }
1452 1453
    if (!key_info->name || check_column_name(key_info->name))
    {
1454
      my_error(ER_WRONG_NAME_FOR_INDEX, MYF(0), key_info->name);
1455 1456
      DBUG_RETURN(-1);
    }
1457 1458
    if (!(key_info->flags & HA_NULL_PART_KEY))
      unique_key=1;
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1459
    key_info->key_length=(uint16) key_length;
1460
    if (key_length > max_key_length && key->type != Key::FULLTEXT)
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1461
    {
1462
      my_error(ER_TOO_LONG_KEY,MYF(0),max_key_length);
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1463 1464
      DBUG_RETURN(-1);
    }
1465
    key_info++;
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1466
  }
1467
  if (!unique_key && !primary_key &&
1468
      (file->table_flags() & HA_REQUIRE_PRIMARY_KEY))
1469
  {
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1470
    my_message(ER_REQUIRES_PRIMARY_KEY, ER(ER_REQUIRES_PRIMARY_KEY), MYF(0));
1471 1472
    DBUG_RETURN(-1);
  }
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  if (auto_increment > 0)
  {
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    my_message(ER_WRONG_AUTO_KEY, ER(ER_WRONG_AUTO_KEY), MYF(0));
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1476 1477
    DBUG_RETURN(-1);
  }
1478
  /* Sort keys in optimized order */
1479
  qsort((gptr) *key_info_buffer, *key_count, sizeof(KEY),
1480
	(qsort_cmp) sort_keys);
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1481
  create_info->null_bits= null_fields;
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1483 1484 1485
  DBUG_RETURN(0);
}

1486

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/*
  Extend long VARCHAR fields to blob & prepare field if it's a blob

  SYNOPSIS
    prepare_blob_field()
    sql_field		Field to check

  RETURN
    0	ok
    1	Error (sql_field can't be converted to blob)
        In this case the error is given
*/

static bool prepare_blob_field(THD *thd, create_field *sql_field)
{
  DBUG_ENTER("prepare_blob_field");

  if (sql_field->length > MAX_FIELD_VARCHARLENGTH &&
      !(sql_field->flags & BLOB_FLAG))
  {
    /* Convert long VARCHAR columns to TEXT or BLOB */
    char warn_buff[MYSQL_ERRMSG_SIZE];

1510 1511
    if (sql_field->def || (thd->variables.sql_mode & (MODE_STRICT_TRANS_TABLES |
                                                      MODE_STRICT_ALL_TABLES)))
1512 1513 1514 1515 1516 1517 1518 1519
    {
      my_error(ER_TOO_BIG_FIELDLENGTH, MYF(0), sql_field->field_name,
               MAX_FIELD_VARCHARLENGTH / sql_field->charset->mbmaxlen);
      DBUG_RETURN(1);
    }
    sql_field->sql_type= FIELD_TYPE_BLOB;
    sql_field->flags|= BLOB_FLAG;
    sprintf(warn_buff, ER(ER_AUTO_CONVERT), sql_field->field_name,
1520
            (sql_field->charset == &my_charset_bin) ? "VARBINARY" : "VARCHAR",
1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539
            (sql_field->charset == &my_charset_bin) ? "BLOB" : "TEXT");
    push_warning(thd, MYSQL_ERROR::WARN_LEVEL_NOTE, ER_AUTO_CONVERT,
                 warn_buff);
  }
    
  if ((sql_field->flags & BLOB_FLAG) && sql_field->length)
  {
    if (sql_field->sql_type == FIELD_TYPE_BLOB)
    {
      /* The user has given a length to the blob column */
      sql_field->sql_type= get_blob_type_from_length(sql_field->length);
      sql_field->pack_length= calc_pack_length(sql_field->sql_type, 0);
    }
    sql_field->length= 0;
  }
  DBUG_RETURN(0);
}


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/*
  Preparation of create_field for SP function return values.
  Based on code used in the inner loop of mysql_prepare_table() above

  SYNOPSIS
    sp_prepare_create_field()
    thd			Thread object
    sql_field		Field to prepare

  DESCRIPTION
    Prepares the field structures for field creation.

*/

void sp_prepare_create_field(THD *thd, create_field *sql_field)
{
  if (sql_field->sql_type == FIELD_TYPE_SET ||
      sql_field->sql_type == FIELD_TYPE_ENUM)
  {
    uint32 field_length, dummy;
    if (sql_field->sql_type == FIELD_TYPE_SET)
    {
      calculate_interval_lengths(sql_field->charset,
                                 sql_field->interval, &dummy, 
                                 &field_length);
      sql_field->length= field_length + 
                         (sql_field->interval->count - 1);
    }
    else /* FIELD_TYPE_ENUM */
    {
      calculate_interval_lengths(sql_field->charset,
                                 sql_field->interval,
                                 &field_length, &dummy);
      sql_field->length= field_length;
    }
    set_if_smaller(sql_field->length, MAX_FIELD_WIDTH-1);
  }

  if (sql_field->sql_type == FIELD_TYPE_BIT)
  {
    sql_field->pack_flag= FIELDFLAG_NUMBER |
                          FIELDFLAG_TREAT_BIT_AS_CHAR;
  }
  sql_field->create_length_to_internal_length();
1584 1585 1586 1587
  DBUG_ASSERT(sql_field->def == 0);
  /* Can't go wrong as sql_field->def is not defined */
  (void) prepare_blob_field(thd, sql_field);
}
1588 1589


1590 1591 1592 1593 1594
/*
  Create a table

  SYNOPSIS
    mysql_create_table()
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    thd                  Thread object
    db                   Database
    table_name           Table name
    create_info [in/out] Create information (like MAX_ROWS)
    alter_info  [in/out] List of columns and indexes to create
1600
    internal_tmp_table   Set to 1 if this is an internal temporary table
1601
                         (From ALTER TABLE)
1602 1603

  DESCRIPTION
1604
    If one creates a temporary table, this is automatically opened
1605 1606 1607 1608 1609 1610

    no_log is needed for the case of CREATE ... SELECT,
    as the logging will be done later in sql_insert.cc
    select_field_count is also used for CREATE ... SELECT,
    and must be zero for standard create of table.

1611 1612 1613 1614 1615
    Note that structures passed as 'create_info' and 'alter_info' parameters
    may be modified by this function. It is responsibility of the caller to
    make a copy of create_info in order to provide correct execution in
    prepared statements/stored routines.

1616
  RETURN VALUES
1617 1618
    FALSE OK
    TRUE  error
1619 1620
*/

1621 1622
bool mysql_create_table(THD *thd,const char *db, const char *table_name,
                        HA_CREATE_INFO *create_info,
1623
                        Alter_info *alter_info,
1624
                        bool internal_tmp_table,
1625
                        uint select_field_count)
1626
{
1627 1628 1629 1630 1631
  char		path[FN_REFLEN];
  const char	*alias;
  uint		db_options, key_count;
  KEY		*key_info_buffer;
  handler	*file;
1632
  bool		error= TRUE;
1633 1634 1635
  DBUG_ENTER("mysql_create_table");

  /* Check for duplicate fields and check type of table to create */
1636
  if (!alter_info->create_list.elements)
1637
  {
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1638 1639
    my_message(ER_TABLE_MUST_HAVE_COLUMNS, ER(ER_TABLE_MUST_HAVE_COLUMNS),
               MYF(0));
1640
    DBUG_RETURN(TRUE);
1641
  }
1642 1643
  if (check_engine(thd, table_name, &create_info->db_type))
    DBUG_RETURN(TRUE);
1644
  db_options= create_info->table_options;
1645 1646 1647
  if (create_info->row_type == ROW_TYPE_DYNAMIC)
    db_options|=HA_OPTION_PACK_RECORD;
  alias= table_case_name(create_info, table_name);
1648
  file= get_new_handler((TABLE*) 0, thd->mem_root, create_info->db_type);
1649

1650 1651 1652 1653 1654 1655 1656 1657
#ifdef NOT_USED
  /*
    if there is a technical reason for a handler not to have support
    for temp. tables this code can be re-enabled.
    Otherwise, if a handler author has a wish to prohibit usage of
    temporary tables for his handler he should implement a check in
    ::create() method
  */
1658 1659 1660
  if ((create_info->options & HA_LEX_CREATE_TMP_TABLE) &&
      (file->table_flags() & HA_NO_TEMP_TABLES))
  {
1661
    my_error(ER_ILLEGAL_HA, MYF(0), table_name);
1662
    DBUG_RETURN(TRUE);
1663
  }
1664
#endif
1665

1666 1667 1668 1669 1670 1671 1672 1673
  /*
    If the table character set was not given explicitely,
    let's fetch the database default character set and
    apply it to the table.
  */
  if (!create_info->default_table_charset)
  {
    HA_CREATE_INFO db_info;
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    load_db_opt_by_name(thd, db, &db_info);

1677 1678 1679
    create_info->default_table_charset= db_info.default_table_charset;
  }

1680 1681 1682
  if (mysql_prepare_table(thd, create_info, alter_info, internal_tmp_table,
                          &db_options, file,
                          &key_info_buffer, &key_count,
1683
                          select_field_count))
1684
    DBUG_RETURN(TRUE);
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1685 1686 1687 1688

      /* Check if table exists */
  if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
  {
1689
    set_tmp_file_path(path, sizeof(path), thd);
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1690 1691
    create_info->table_options|=HA_CREATE_DELAY_KEY_WRITE;
  }
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  else  
  {
	#ifdef FN_DEVCHAR
	  /* check if the table name contains FN_DEVCHAR when defined */
	  const char *start= alias;
	  while (*start != '\0')
	  {
		  if (*start == FN_DEVCHAR)
		  {
			  my_error(ER_WRONG_TABLE_NAME, MYF(0), alias);
			  DBUG_RETURN(TRUE);
		  }
		  start++;
	  }	  
	#endif
1707
    build_table_path(path, sizeof(path), db, alias, reg_ext);
1708
  }
1709

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  /* Check if table already exists */
  if ((create_info->options & HA_LEX_CREATE_TMP_TABLE)
      && find_temporary_table(thd,db,table_name))
  {
1714
    if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
1715 1716
    {
      create_info->table_existed= 1;		// Mark that table existed
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      push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
                          ER_TABLE_EXISTS_ERROR, ER(ER_TABLE_EXISTS_ERROR),
                          alias);
1720
      DBUG_RETURN(FALSE);
1721
    }
1722
    DBUG_PRINT("info",("1"));
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1723
    my_error(ER_TABLE_EXISTS_ERROR, MYF(0), alias);
1724
    DBUG_RETURN(TRUE);
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1725 1726
  }
  VOID(pthread_mutex_lock(&LOCK_open));
1727
  if (!internal_tmp_table && !(create_info->options & HA_LEX_CREATE_TMP_TABLE))
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1728
  {
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1729 1730 1731 1732 1733 1734 1735 1736
    /*
      Inspecting table cache for placeholders created by concurrent
      CREATE TABLE ... SELECT statements to avoid interfering with them
      is 5.0-only solution. Starting from 5.1 we solve this problem by
      obtaining name-lock on the table to be created first.
    */
    if (table_cache_has_open_placeholder(thd, db, table_name) ||
        !access(path, F_OK))
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1737 1738
    {
      if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
1739
        goto warn;
1740
      DBUG_PRINT("info",("2"));
1741
      my_error(ER_TABLE_EXISTS_ERROR,MYF(0),table_name);
1742
      goto end;
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    }
  }

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  /*
    Check that table with given name does not already
    exist in any storage engine. In such a case it should
    be discovered and the error ER_TABLE_EXISTS_ERROR be returned
    unless user specified CREATE TABLE IF EXISTS
    The LOCK_open mutex has been locked to make sure no
    one else is attempting to discover the table. Since
    it's not on disk as a frm file, no one could be using it!
  */
  if (!(create_info->options & HA_LEX_CREATE_TMP_TABLE))
  {
    bool create_if_not_exists =
      create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS;
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    int retcode = ha_table_exists_in_engine(thd, db, table_name);
    DBUG_PRINT("info", ("exists_in_engine: %u",retcode));
    switch (retcode)
1762
    {
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      case HA_ERR_NO_SUCH_TABLE:
        /* Normal case, no table exists. we can go and create it */
        break;
      case HA_ERR_TABLE_EXIST:
        DBUG_PRINT("info", ("Table existed in handler"));

        if (create_if_not_exists)
          goto warn;
        my_error(ER_TABLE_EXISTS_ERROR,MYF(0),table_name);
        goto end;
        break;
      default:
        DBUG_PRINT("info", ("error: %u from storage engine", retcode));
        my_error(retcode, MYF(0),table_name);
        goto end;
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    }
  }

  thd->proc_info="creating table";
1782
  create_info->table_existed= 0;		// Mark that table is created
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1784
  if (thd->variables.sql_mode & MODE_NO_DIR_IN_CREATE)
1785
    create_info->data_file_name= create_info->index_file_name= 0;
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  create_info->table_options=db_options;
1787

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1788
  if (rea_create_table(thd, path, db, table_name,
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                       create_info, alter_info->create_list,
                       key_count, key_info_buffer))
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    goto end;
  if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
  {
    /* Open table and put in temporary table list */
    if (!(open_temporary_table(thd, path, db, table_name, 1)))
    {
      (void) rm_temporary_table(create_info->db_type, path);
      goto end;
    }
1800
    thd->tmp_table_used= 1;
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1801
  }
1802
  if (!internal_tmp_table && mysql_bin_log.is_open())
1803
  {
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1804
    thd->clear_error();
1805
    Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
1806
    mysql_bin_log.write(&qinfo);
1807
  }
1808
  error= FALSE;
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1809

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end:
  VOID(pthread_mutex_unlock(&LOCK_open));
  thd->proc_info="After create";
  DBUG_RETURN(error);
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warn:
  error= FALSE;
  push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
                      ER_TABLE_EXISTS_ERROR, ER(ER_TABLE_EXISTS_ERROR),
                      alias);
  create_info->table_existed= 1;		// Mark that table existed
  goto end;
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1822 1823 1824 1825 1826 1827 1828 1829 1830 1831
}

/*
** Give the key name after the first field with an optional '_#' after
**/

static bool
check_if_keyname_exists(const char *name, KEY *start, KEY *end)
{
  for (KEY *key=start ; key != end ; key++)
1832
    if (!my_strcasecmp(system_charset_info,name,key->name))
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1833 1834 1835 1836 1837 1838 1839 1840 1841 1842
      return 1;
  return 0;
}


static char *
make_unique_key_name(const char *field_name,KEY *start,KEY *end)
{
  char buff[MAX_FIELD_NAME],*buff_end;

1843 1844
  if (!check_if_keyname_exists(field_name,start,end) &&
      my_strcasecmp(system_charset_info,field_name,primary_key_name))
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1845
    return (char*) field_name;			// Use fieldname
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  buff_end=strmake(buff,field_name, sizeof(buff)-4);

  /*
    Only 3 chars + '\0' left, so need to limit to 2 digit
    This is ok as we can't have more than 100 keys anyway
  */
1852
  for (uint i=2 ; i< 100; i++)
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1853
  {
1854 1855
    *buff_end= '_';
    int10_to_str(i, buff_end+1, 10);
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1856 1857 1858
    if (!check_if_keyname_exists(buff,start,end))
      return sql_strdup(buff);
  }
1859
  return (char*) "not_specified";		// Should never happen
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1860 1861
}

1862

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1863 1864 1865 1866
/****************************************************************************
** Alter a table definition
****************************************************************************/

1867
bool
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1868 1869
mysql_rename_table(enum db_type base,
		   const char *old_db,
1870
		   const char *old_name,
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1871
		   const char *new_db,
1872
		   const char *new_name)
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{
1874
  THD *thd= current_thd;
1875 1876 1877
  char from[FN_REFLEN], to[FN_REFLEN], lc_from[FN_REFLEN], lc_to[FN_REFLEN];
  char *from_base= from, *to_base= to;
  char tmp_name[NAME_LEN+1];
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  handler *file= (base == DB_TYPE_UNKNOWN ? 0 :
                  get_new_handler((TABLE*) 0, thd->mem_root, base));
1880
  int error=0;
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1881
  DBUG_ENTER("mysql_rename_table");
1882

1883 1884 1885 1886 1887 1888 1889 1890
  build_table_path(from, sizeof(from), old_db, old_name, "");
  build_table_path(to, sizeof(to), new_db, new_name, "");

  /*
    If lower_case_table_names == 2 (case-preserving but case-insensitive
    file system) and the storage is not HA_FILE_BASED, we need to provide
    a lowercase file name, but we leave the .frm in mixed case.
   */
1891 1892
  if (lower_case_table_names == 2 && file &&
      !(file->table_flags() & HA_FILE_BASED))
1893
  {
1894 1895 1896 1897
    strmov(tmp_name, old_name);
    my_casedn_str(files_charset_info, tmp_name);
    build_table_path(lc_from, sizeof(lc_from), old_db, tmp_name, "");
    from_base= lc_from;
1898

1899 1900 1901 1902
    strmov(tmp_name, new_name);
    my_casedn_str(files_charset_info, tmp_name);
    build_table_path(lc_to, sizeof(lc_to), new_db, tmp_name, "");
    to_base= lc_to;
1903 1904
  }

1905
  if (!file || !(error=file->rename_table(from_base, to_base)))
1906 1907 1908
  {
    if (rename_file_ext(from,to,reg_ext))
    {
1909
      error=my_errno;
1910
      /* Restore old file name */
1911
      if (file)
1912
        file->rename_table(to_base, from_base);
1913 1914
    }
  }
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1915
  delete file;
1916 1917 1918
  if (error == HA_ERR_WRONG_COMMAND)
    my_error(ER_NOT_SUPPORTED_YET, MYF(0), "ALTER TABLE");
  else if (error)
1919 1920
    my_error(ER_ERROR_ON_RENAME, MYF(0), from, to, error);
  DBUG_RETURN(error != 0);
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1921 1922
}

1923

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1924
/*
1925 1926 1927 1928 1929 1930
  Force all other threads to stop using the table

  SYNOPSIS
    wait_while_table_is_used()
    thd			Thread handler
    table		Table to remove from cache
1931
    function		HA_EXTRA_PREPARE_FOR_DELETE if table is to be deleted
1932
			HA_EXTRA_FORCE_REOPEN if table is not be used
1933 1934 1935 1936 1937 1938 1939
  NOTES
   When returning, the table will be unusable for other threads until
   the table is closed.

  PREREQUISITES
    Lock on LOCK_open
    Win32 clients must also have a WRITE LOCK on the table !
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1940 1941
*/

1942 1943
static void wait_while_table_is_used(THD *thd,TABLE *table,
				     enum ha_extra_function function)
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1944
{
1945
  DBUG_PRINT("enter",("table: %s", table->s->table_name));
1946 1947
  DBUG_ENTER("wait_while_table_is_used");
  safe_mutex_assert_owner(&LOCK_open);
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1948

1949
  VOID(table->file->extra(function));
1950 1951 1952 1953
  /* Mark all tables that are in use as 'old' */
  mysql_lock_abort(thd, table);			// end threads waiting on lock

  /* Wait until all there are no other threads that has this table open */
1954 1955
  remove_table_from_cache(thd, table->s->db,
                          table->s->table_name, RTFC_WAIT_OTHER_THREAD_FLAG);
1956 1957
  DBUG_VOID_RETURN;
}
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1958

1959 1960
/*
  Close a cached table
1961

1962
  SYNOPSIS
1963
    close_cached_table()
1964 1965 1966 1967 1968 1969
    thd			Thread handler
    table		Table to remove from cache

  NOTES
    Function ends by signaling threads waiting for the table to try to
    reopen the table.
1970

1971 1972 1973 1974
  PREREQUISITES
    Lock on LOCK_open
    Win32 clients must also have a WRITE LOCK on the table !
*/
1975

1976
void close_cached_table(THD *thd, TABLE *table)
1977 1978
{
  DBUG_ENTER("close_cached_table");
1979

1980
  wait_while_table_is_used(thd, table, HA_EXTRA_PREPARE_FOR_DELETE);
1981 1982
  /* Close lock if this is not got with LOCK TABLES */
  if (thd->lock)
1983
  {
1984 1985
    mysql_unlock_tables(thd, thd->lock);
    thd->lock=0;			// Start locked threads
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1986
  }
1987 1988 1989 1990
  /* Close all copies of 'table'.  This also frees all LOCK TABLES lock */
  thd->open_tables=unlink_open_table(thd,thd->open_tables,table);

  /* When lock on LOCK_open is freed other threads can continue */
1991
  broadcast_refresh();
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1992
  DBUG_VOID_RETURN;
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1993 1994
}

1995
static int send_check_errmsg(THD *thd, TABLE_LIST* table,
1996
			     const char* operator_name, const char* errmsg)
1997

1998
{
1999 2000
  Protocol *protocol= thd->protocol;
  protocol->prepare_for_resend();
2001 2002
  protocol->store(table->alias, system_charset_info);
  protocol->store((char*) operator_name, system_charset_info);
2003
  protocol->store(STRING_WITH_LEN("error"), system_charset_info);
2004
  protocol->store(errmsg, system_charset_info);
2005
  thd->clear_error();
2006
  if (protocol->write())
2007 2008 2009 2010
    return -1;
  return 1;
}

2011

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2012
static int prepare_for_restore(THD* thd, TABLE_LIST* table,
2013
			       HA_CHECK_OPT *check_opt)
2014
{
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2015
  DBUG_ENTER("prepare_for_restore");
2016

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2017 2018 2019 2020 2021 2022
  if (table->table) // do not overwrite existing tables on restore
  {
    DBUG_RETURN(send_check_errmsg(thd, table, "restore",
				  "table exists, will not overwrite on restore"
				  ));
  }
2023
  else
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2024
  {
2025
    char* backup_dir= thd->lex->backup_dir;
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2026
    char src_path[FN_REFLEN], dst_path[FN_REFLEN];
2027 2028
    char* table_name= table->table_name;
    char* db= table->db;
2029

2030 2031
    if (fn_format_relative_to_data_home(src_path, table_name, backup_dir,
					reg_ext))
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2032
      DBUG_RETURN(-1); // protect buffer overflow
2033

2034
    my_snprintf(dst_path, sizeof(dst_path), "%s%s/%s",
2035
		mysql_real_data_home, db, table_name);
2036

2037
    if (lock_and_wait_for_table_name(thd,table))
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2038
      DBUG_RETURN(-1);
2039

2040
    if (my_copy(src_path,
2041 2042
		fn_format(dst_path, dst_path,"", reg_ext, 4),
		MYF(MY_WME)))
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2043
    {
2044
      pthread_mutex_lock(&LOCK_open);
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2045
      unlock_table_name(thd, table);
2046
      pthread_mutex_unlock(&LOCK_open);
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2047 2048 2049
      DBUG_RETURN(send_check_errmsg(thd, table, "restore",
				    "Failed copying .frm file"));
    }
2050
    if (mysql_truncate(thd, table, 1))
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2051
    {
2052
      pthread_mutex_lock(&LOCK_open);
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2053
      unlock_table_name(thd, table);
2054
      pthread_mutex_unlock(&LOCK_open);
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2055 2056
      DBUG_RETURN(send_check_errmsg(thd, table, "restore",
				    "Failed generating table from .frm file"));
2057
    }
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2058
  }
2059

2060 2061 2062 2063
  /*
    Now we should be able to open the partially restored table
    to finish the restore in the handler later on
  */
2064
  pthread_mutex_lock(&LOCK_open);
dlenev@mockturtle.local's avatar
dlenev@mockturtle.local committed
2065
  if (reopen_name_locked_table(thd, table, TRUE))
2066
  {
2067
    unlock_table_name(thd, table);
2068
    pthread_mutex_unlock(&LOCK_open);
2069 2070
    DBUG_RETURN(send_check_errmsg(thd, table, "restore",
                                  "Failed to open partially restored table"));
2071
  }
2072
  pthread_mutex_unlock(&LOCK_open);
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2073
  DBUG_RETURN(0);
2074
}
2075

2076

2077
static int prepare_for_repair(THD* thd, TABLE_LIST *table_list,
2078
			      HA_CHECK_OPT *check_opt)
serg@serg.mysql.com's avatar
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2079
{
2080 2081
  int error= 0;
  TABLE tmp_table, *table;
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serg@serg.mysql.com committed
2082 2083 2084 2085
  DBUG_ENTER("prepare_for_repair");

  if (!(check_opt->sql_flags & TT_USEFRM))
    DBUG_RETURN(0);
2086 2087

  if (!(table= table_list->table))		/* if open_ltable failed */
serg@serg.mysql.com's avatar
serg@serg.mysql.com committed
2088
  {
2089
    char name[FN_REFLEN];
2090
    build_table_path(name, sizeof(name), table_list->db,
2091
                     table_list->table_name, "");
2092
    if (openfrm(thd, name, "", 0, 0, 0, &tmp_table))
2093 2094
      DBUG_RETURN(0);				// Can't open frm file
    table= &tmp_table;
2095
  }
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serg@serg.mysql.com committed
2096

2097 2098 2099 2100 2101 2102 2103 2104 2105
  /*
    User gave us USE_FRM which means that the header in the index file is
    trashed.
    In this case we will try to fix the table the following way:
    - Rename the data file to a temporary name
    - Truncate the table
    - Replace the new data file with the old one
    - Run a normal repair using the new index file and the old data file
  */
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2106

2107 2108 2109
  char from[FN_REFLEN],tmp[FN_REFLEN+32];
  const char **ext= table->file->bas_ext();
  MY_STAT stat_info;
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serg@serg.mysql.com committed
2110

2111 2112
  /*
    Check if this is a table type that stores index and data separately,
2113 2114 2115
    like ISAM or MyISAM. We assume fixed order of engine file name
    extentions array. First element of engine file name extentions array
    is meta/index file extention. Second element - data file extention. 
2116 2117 2118
  */
  if (!ext[0] || !ext[1])
    goto end;					// No data file
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serg@serg.mysql.com committed
2119

2120
  strxmov(from, table->s->path, ext[1], NullS);	// Name of data file
2121 2122
  if (!my_stat(from, &stat_info, MYF(0)))
    goto end;				// Can't use USE_FRM flag
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serg@serg.mysql.com committed
2123

2124 2125
  my_snprintf(tmp, sizeof(tmp), "%s-%lx_%lx",
	      from, current_pid, thd->thread_id);
2126

2127 2128 2129 2130 2131 2132 2133
  /* If we could open the table, close it */
  if (table_list->table)
  {
    pthread_mutex_lock(&LOCK_open);
    close_cached_table(thd, table);
    pthread_mutex_unlock(&LOCK_open);
  }
2134
  if (lock_and_wait_for_table_name(thd,table_list))
serg@serg.mysql.com's avatar
serg@serg.mysql.com committed
2135
  {
2136 2137
    error= -1;
    goto end;
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serg@serg.mysql.com committed
2138
  }
2139
  if (my_rename(from, tmp, MYF(MY_WME)))
serg@serg.mysql.com's avatar
serg@serg.mysql.com committed
2140
  {
2141
    pthread_mutex_lock(&LOCK_open);
2142
    unlock_table_name(thd, table_list);
2143
    pthread_mutex_unlock(&LOCK_open);
2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164
    error= send_check_errmsg(thd, table_list, "repair",
			     "Failed renaming data file");
    goto end;
  }
  if (mysql_truncate(thd, table_list, 1))
  {
    pthread_mutex_lock(&LOCK_open);
    unlock_table_name(thd, table_list);
    pthread_mutex_unlock(&LOCK_open);
    error= send_check_errmsg(thd, table_list, "repair",
			     "Failed generating table from .frm file");
    goto end;
  }
  if (my_rename(tmp, from, MYF(MY_WME)))
  {
    pthread_mutex_lock(&LOCK_open);
    unlock_table_name(thd, table_list);
    pthread_mutex_unlock(&LOCK_open);
    error= send_check_errmsg(thd, table_list, "repair",
			     "Failed restoring .MYD file");
    goto end;
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serg@serg.mysql.com committed
2165 2166
  }

2167 2168 2169 2170
  /*
    Now we should be able to open the partially repaired table
    to finish the repair in the handler later on.
  */
2171
  pthread_mutex_lock(&LOCK_open);
dlenev@mockturtle.local's avatar
dlenev@mockturtle.local committed
2172
  if (reopen_name_locked_table(thd, table_list, TRUE))
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2173
  {
2174
    unlock_table_name(thd, table_list);
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2175
    pthread_mutex_unlock(&LOCK_open);
2176 2177 2178
    error= send_check_errmsg(thd, table_list, "repair",
                             "Failed to open partially repaired table");
    goto end;
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monty@hundin.mysql.fi committed
2179
  }
2180
  pthread_mutex_unlock(&LOCK_open);
2181 2182 2183 2184 2185

end:
  if (table == &tmp_table)
    closefrm(table);				// Free allocated memory
  DBUG_RETURN(error);
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serg@serg.mysql.com committed
2186
}
2187

2188

2189

2190 2191
/*
  RETURN VALUES
bell@sanja.is.com.ua's avatar
merge  
bell@sanja.is.com.ua committed
2192 2193 2194
    FALSE Message sent to net (admin operation went ok)
    TRUE  Message should be sent by caller 
          (admin operation or network communication failed)
2195
*/
2196 2197 2198 2199 2200
static bool mysql_admin_table(THD* thd, TABLE_LIST* tables,
                              HA_CHECK_OPT* check_opt,
                              const char *operator_name,
                              thr_lock_type lock_type,
                              bool open_for_modify,
2201
                              bool no_warnings_for_error,
2202 2203 2204
                              uint extra_open_options,
                              int (*prepare_func)(THD *, TABLE_LIST *,
                                                  HA_CHECK_OPT *),
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2205 2206 2207
                              int (handler::*operator_func)(THD *,
                                                            HA_CHECK_OPT *),
                              int (view_operator_func)(THD *, TABLE_LIST*))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2208
{
2209
  TABLE_LIST *table;
2210
  SELECT_LEX *select= &thd->lex->select_lex;
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2211
  List<Item> field_list;
2212 2213
  Item *item;
  Protocol *protocol= thd->protocol;
2214
  LEX *lex= thd->lex;
2215
  int result_code;
2216
  DBUG_ENTER("mysql_admin_table");
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2217 2218 2219 2220 2221 2222 2223 2224 2225

  field_list.push_back(item = new Item_empty_string("Table", NAME_LEN*2));
  item->maybe_null = 1;
  field_list.push_back(item = new Item_empty_string("Op", 10));
  item->maybe_null = 1;
  field_list.push_back(item = new Item_empty_string("Msg_type", 10));
  item->maybe_null = 1;
  field_list.push_back(item = new Item_empty_string("Msg_text", 255));
  item->maybe_null = 1;
2226 2227
  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
2228
    DBUG_RETURN(TRUE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2229

2230
  mysql_ha_flush(thd, tables, MYSQL_HA_CLOSE_FINAL, FALSE);
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2231
  for (table= tables; table; table= table->next_local)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2232 2233
  {
    char table_name[NAME_LEN*2+2];
2234
    char* db = table->db;
2235
    bool fatal_error=0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2236

serg@serg.mylan's avatar
serg@serg.mylan committed
2237
    strxmov(table_name, db, ".", table->table_name, NullS);
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2238
    thd->open_options|= extra_open_options;
2239
    table->lock_type= lock_type;
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
    /* open only one table from local list of command */
    {
      TABLE_LIST *save_next_global, *save_next_local;
      save_next_global= table->next_global;
      table->next_global= 0;
      save_next_local= table->next_local;
      table->next_local= 0;
      select->table_list.first= (byte*)table;
      /*
        Time zone tables and SP tables can be add to lex->query_tables list,
        so it have to be prepared.
        TODO: Investigate if we can put extra tables into argument instead of
        using lex->query_tables
      */
      lex->query_tables= table;
      lex->query_tables_last= &table->next_global;
      lex->query_tables_own_last= 0;
      thd->no_warnings_for_error= no_warnings_for_error;
      if (view_operator_func == NULL)
        table->required_type=FRMTYPE_TABLE;
      open_and_lock_tables(thd, table);
      thd->no_warnings_for_error= 0;
      table->next_global= save_next_global;
      table->next_local= save_next_local;
      thd->open_options&= ~extra_open_options;
    }
2267
    if (prepare_func)
2268
    {
serg@serg.mysql.com's avatar
serg@serg.mysql.com committed
2269
      switch ((*prepare_func)(thd, table, check_opt)) {
2270 2271 2272 2273 2274 2275 2276
      case  1:           // error, message written to net
        close_thread_tables(thd);
        continue;
      case -1:           // error, message could be written to net
        goto err;
      default:           // should be 0 otherwise
        ;
2277
      }
2278
    }
2279

2280
    /*
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2281 2282 2283 2284 2285 2286
      CHECK TABLE command is only command where VIEW allowed here and this
      command use only temporary teble method for VIEWs resolving => there
      can't be VIEW tree substitition of join view => if opening table
      succeed then table->table will have real TABLE pointer as value (in
      case of join view substitution table->table can be 0, but here it is
      impossible)
2287
    */
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bk@work.mysql.com committed
2288 2289
    if (!table->table)
    {
2290 2291 2292
      if (!thd->warn_list.elements)
        push_warning(thd, MYSQL_ERROR::WARN_LEVEL_ERROR,
                     ER_CHECK_NO_SUCH_TABLE, ER(ER_CHECK_NO_SUCH_TABLE));
2293 2294 2295
      /* if it was a view will check md5 sum */
      if (table->view &&
          view_checksum(thd, table) == HA_ADMIN_WRONG_CHECKSUM)
2296 2297 2298 2299
        push_warning(thd, MYSQL_ERROR::WARN_LEVEL_ERROR,
                     ER_VIEW_CHECKSUM, ER(ER_VIEW_CHECKSUM));
      result_code= HA_ADMIN_CORRUPT;
      goto send_result;
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bk@work.mysql.com committed
2300
    }
2301 2302 2303 2304 2305 2306 2307

    if (table->view)
    {
      result_code= (*view_operator_func)(thd, table);
      goto send_result;
    }

2308
    if ((table->table->db_stat & HA_READ_ONLY) && open_for_modify)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2309
    {
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
2310
      char buff[FN_REFLEN + MYSQL_ERRMSG_SIZE];
2311
      uint length;
2312
      protocol->prepare_for_resend();
2313 2314
      protocol->store(table_name, system_charset_info);
      protocol->store(operator_name, system_charset_info);
2315
      protocol->store(STRING_WITH_LEN("error"), system_charset_info);
2316 2317 2318
      length= my_snprintf(buff, sizeof(buff), ER(ER_OPEN_AS_READONLY),
                          table_name);
      protocol->store(buff, length, system_charset_info);
2319
      close_thread_tables(thd);
2320
      table->table=0;				// For query cache
2321
      if (protocol->write())
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bk@work.mysql.com committed
2322 2323 2324 2325
	goto err;
      continue;
    }

2326
    /* Close all instances of the table to allow repair to rename files */
2327
    if (lock_type == TL_WRITE && table->table->s->version)
2328 2329
    {
      pthread_mutex_lock(&LOCK_open);
2330 2331
      const char *old_message=thd->enter_cond(&COND_refresh, &LOCK_open,
					      "Waiting to get writelock");
2332
      mysql_lock_abort(thd,table->table);
2333
      remove_table_from_cache(thd, table->table->s->db,
2334
                              table->table->s->table_name,
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2335 2336
                              RTFC_WAIT_OTHER_THREAD_FLAG |
                              RTFC_CHECK_KILLED_FLAG);
2337
      thd->exit_cond(old_message);
2338 2339
      if (thd->killed)
	goto err;
2340 2341 2342
      /* Flush entries in the query cache involving this table. */
      query_cache_invalidate3(thd, table->table, 0);
      open_for_modify= 0;
2343 2344
    }

2345
    if (table->table->s->crashed && operator_func == &handler::ha_check)
2346 2347 2348 2349
    {
      protocol->prepare_for_resend();
      protocol->store(table_name, system_charset_info);
      protocol->store(operator_name, system_charset_info);
2350 2351 2352
      protocol->store(STRING_WITH_LEN("warning"), system_charset_info);
      protocol->store(STRING_WITH_LEN("Table is marked as crashed"),
                      system_charset_info);
2353 2354 2355 2356
      if (protocol->write())
        goto err;
    }

2357 2358 2359 2360 2361 2362
    if (operator_func == &handler::ha_repair)
    {
      if ((table->table->file->check_old_types() == HA_ADMIN_NEEDS_ALTER) ||
          (table->table->file->ha_check_for_upgrade(check_opt) ==
           HA_ADMIN_NEEDS_ALTER))
      {
2363
        my_bool save_no_send_ok= thd->net.no_send_ok;
2364 2365
        close_thread_tables(thd);
        tmp_disable_binlog(thd); // binlogging is done by caller if wanted
2366 2367 2368
        thd->net.no_send_ok= TRUE;
        result_code= mysql_recreate_table(thd, table);
        thd->net.no_send_ok= save_no_send_ok;
2369 2370 2371 2372 2373 2374
        reenable_binlog(thd);
        goto send_result;
      }

    }

2375 2376 2377 2378
    result_code = (table->table->file->*operator_func)(thd, check_opt);

send_result:

2379
    lex->cleanup_after_one_table_open();
2380
    thd->clear_error();  // these errors shouldn't get client
2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396
    {
      List_iterator_fast<MYSQL_ERROR> it(thd->warn_list);
      MYSQL_ERROR *err;
      while ((err= it++))
      {
        protocol->prepare_for_resend();
        protocol->store(table_name, system_charset_info);
        protocol->store((char*) operator_name, system_charset_info);
        protocol->store(warning_level_names[err->level],
                        warning_level_length[err->level], system_charset_info);
        protocol->store(err->msg, system_charset_info);
        if (protocol->write())
          goto err;
      }
      mysql_reset_errors(thd, true);
    }
2397
    protocol->prepare_for_resend();
2398 2399
    protocol->store(table_name, system_charset_info);
    protocol->store(operator_name, system_charset_info);
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bk@work.mysql.com committed
2400

2401 2402 2403
send_result_message:

    DBUG_PRINT("info", ("result_code: %d", result_code));
2404 2405
    switch (result_code) {
    case HA_ADMIN_NOT_IMPLEMENTED:
2406
      {
2407 2408
	char buf[ERRMSGSIZE+20];
	uint length=my_snprintf(buf, ERRMSGSIZE,
2409
				ER(ER_CHECK_NOT_IMPLEMENTED), operator_name);
2410
	protocol->store(STRING_WITH_LEN("note"), system_charset_info);
2411
	protocol->store(buf, length, system_charset_info);
2412
      }
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bk@work.mysql.com committed
2413 2414
      break;

igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2415 2416
    case HA_ADMIN_NOT_BASE_TABLE:
      {
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2417 2418
        char buf[ERRMSGSIZE+20];
        uint length= my_snprintf(buf, ERRMSGSIZE,
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2419
                                 ER(ER_BAD_TABLE_ERROR), table_name);
2420
        protocol->store(STRING_WITH_LEN("note"), system_charset_info);
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2421
        protocol->store(buf, length, system_charset_info);
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2422 2423 2424
      }
      break;

2425
    case HA_ADMIN_OK:
2426 2427
      protocol->store(STRING_WITH_LEN("status"), system_charset_info);
      protocol->store(STRING_WITH_LEN("OK"), system_charset_info);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2428 2429
      break;

2430
    case HA_ADMIN_FAILED:
2431 2432 2433
      protocol->store(STRING_WITH_LEN("status"), system_charset_info);
      protocol->store(STRING_WITH_LEN("Operation failed"),
                      system_charset_info);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2434 2435
      break;

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vva@eagle.mysql.r18.ru committed
2436
    case HA_ADMIN_REJECT:
2437 2438 2439
      protocol->store(STRING_WITH_LEN("status"), system_charset_info);
      protocol->store(STRING_WITH_LEN("Operation need committed state"),
                      system_charset_info);
monty@mysql.com's avatar
monty@mysql.com committed
2440
      open_for_modify= FALSE;
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vva@eagle.mysql.r18.ru committed
2441 2442
      break;

2443
    case HA_ADMIN_ALREADY_DONE:
2444 2445 2446
      protocol->store(STRING_WITH_LEN("status"), system_charset_info);
      protocol->store(STRING_WITH_LEN("Table is already up to date"),
                      system_charset_info);
2447 2448
      break;

2449
    case HA_ADMIN_CORRUPT:
2450 2451
      protocol->store(STRING_WITH_LEN("error"), system_charset_info);
      protocol->store(STRING_WITH_LEN("Corrupt"), system_charset_info);
2452
      fatal_error=1;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2453 2454
      break;

2455
    case HA_ADMIN_INVALID:
2456 2457 2458
      protocol->store(STRING_WITH_LEN("error"), system_charset_info);
      protocol->store(STRING_WITH_LEN("Invalid argument"),
                      system_charset_info);
2459 2460
      break;

2461 2462
    case HA_ADMIN_TRY_ALTER:
    {
2463
      my_bool save_no_send_ok= thd->net.no_send_ok;
2464 2465 2466 2467 2468 2469
      /*
        This is currently used only by InnoDB. ha_innobase::optimize() answers
        "try with alter", so here we close the table, do an ALTER TABLE,
        reopen the table and do ha_innobase::analyze() on it.
      */
      close_thread_tables(thd);
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2470 2471 2472
      TABLE_LIST *save_next_local= table->next_local,
                 *save_next_global= table->next_global;
      table->next_local= table->next_global= 0;
2473
      tmp_disable_binlog(thd); // binlogging is done by caller if wanted
2474 2475 2476
      thd->net.no_send_ok= TRUE;
      result_code= mysql_recreate_table(thd, table);
      thd->net.no_send_ok= save_no_send_ok;
2477
      reenable_binlog(thd);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2478
      close_thread_tables(thd);
2479 2480 2481 2482 2483 2484
      if (!result_code) // recreation went ok
      {
        if ((table->table= open_ltable(thd, table, lock_type)) &&
            ((result_code= table->table->file->analyze(thd, check_opt)) > 0))
          result_code= 0; // analyze went ok
      }
2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496
      if (result_code) // either mysql_recreate_table or analyze failed
      {
        const char *err_msg;
        if ((err_msg= thd->net.last_error))
        {
          if (!thd->vio_ok())
          {
            sql_print_error(err_msg);
          }
          else
          {
            /* Hijack the row already in-progress. */
2497
            protocol->store(STRING_WITH_LEN("error"), system_charset_info);
2498 2499 2500 2501 2502 2503 2504 2505 2506
            protocol->store(err_msg, system_charset_info);
            (void)protocol->write();
            /* Start off another row for HA_ADMIN_FAILED */
            protocol->prepare_for_resend();
            protocol->store(table_name, system_charset_info);
            protocol->store(operator_name, system_charset_info);
          }
        }
      }
2507
      result_code= result_code ? HA_ADMIN_FAILED : HA_ADMIN_OK;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2508 2509
      table->next_local= save_next_local;
      table->next_global= save_next_global;
2510 2511
      goto send_result_message;
    }
2512 2513
    case HA_ADMIN_WRONG_CHECKSUM:
    {
2514
      protocol->store(STRING_WITH_LEN("note"), system_charset_info);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2515 2516
      protocol->store(ER(ER_VIEW_CHECKSUM), strlen(ER(ER_VIEW_CHECKSUM)),
                      system_charset_info);
2517 2518
      break;
    }
2519

2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532
    case HA_ADMIN_NEEDS_UPGRADE:
    case HA_ADMIN_NEEDS_ALTER:
    {
      char buf[ERRMSGSIZE];
      uint length;

      protocol->store(STRING_WITH_LEN("error"), system_charset_info);
      length=my_snprintf(buf, ERRMSGSIZE, ER(ER_TABLE_NEEDS_UPGRADE), table->table_name);
      protocol->store(buf, length, system_charset_info);
      fatal_error=1;
      break;
    }

2533
    default:				// Probably HA_ADMIN_INTERNAL_ERROR
2534 2535 2536 2537 2538
      {
        char buf[ERRMSGSIZE+20];
        uint length=my_snprintf(buf, ERRMSGSIZE,
                                "Unknown - internal error %d during operation",
                                result_code);
2539
        protocol->store(STRING_WITH_LEN("error"), system_charset_info);
2540 2541 2542 2543
        protocol->store(buf, length, system_charset_info);
        fatal_error=1;
        break;
      }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2544
    }
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2545
    if (table->table)
2546
    {
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2547 2548 2549 2550
      if (fatal_error)
        table->table->s->version=0;               // Force close of table
      else if (open_for_modify)
      {
holyfoot@deer.(none)'s avatar
holyfoot@deer.(none) committed
2551
        if (table->table->s->tmp_table)
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holyfoot@mysql.com committed
2552 2553 2554 2555 2556 2557 2558 2559 2560
          table->table->file->info(HA_STATUS_CONST);
        else
        {
          pthread_mutex_lock(&LOCK_open);
          remove_table_from_cache(thd, table->table->s->db,
                                  table->table->s->table_name, RTFC_NO_FLAG);
          pthread_mutex_unlock(&LOCK_open);
        }
        /* May be something modified consequently we have to invalidate cache */
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igor@rurik.mysql.com committed
2561 2562
        query_cache_invalidate3(thd, table->table, 0);
      }
2563
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2564
    close_thread_tables(thd);
2565
    lex->reset_query_tables_list(FALSE);
2566
    table->table=0;				// For query cache
2567
    if (protocol->write())
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bk@work.mysql.com committed
2568 2569 2570
      goto err;
  }

2571
  send_eof(thd);
2572
  DBUG_RETURN(FALSE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2573
 err:
2574
  close_thread_tables(thd);			// Shouldn't be needed
2575 2576
  if (table)
    table->table=0;
2577
  DBUG_RETURN(TRUE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2578 2579
}

2580

2581
bool mysql_backup_table(THD* thd, TABLE_LIST* table_list)
2582 2583 2584
{
  DBUG_ENTER("mysql_backup_table");
  DBUG_RETURN(mysql_admin_table(thd, table_list, 0,
2585
				"backup", TL_READ, 0, 0, 0, 0,
2586
				&handler::backup, 0));
2587
}
2588

2589

2590
bool mysql_restore_table(THD* thd, TABLE_LIST* table_list)
2591 2592 2593
{
  DBUG_ENTER("mysql_restore_table");
  DBUG_RETURN(mysql_admin_table(thd, table_list, 0,
2594
				"restore", TL_WRITE, 1, 1, 0,
2595
				&prepare_for_restore,
2596
				&handler::restore, 0));
2597
}
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2598

2599

2600
bool mysql_repair_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT* check_opt)
2601 2602 2603
{
  DBUG_ENTER("mysql_repair_table");
  DBUG_RETURN(mysql_admin_table(thd, tables, check_opt,
2604 2605 2606
				"repair", TL_WRITE, 1,
                                test(check_opt->sql_flags & TT_USEFRM),
                                HA_OPEN_FOR_REPAIR,
2607
				&prepare_for_repair,
2608
				&handler::ha_repair, 0));
2609 2610
}

2611

2612
bool mysql_optimize_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT* check_opt)
2613 2614 2615
{
  DBUG_ENTER("mysql_optimize_table");
  DBUG_RETURN(mysql_admin_table(thd, tables, check_opt,
2616
				"optimize", TL_WRITE, 1,0,0,0,
2617
				&handler::optimize, 0));
2618 2619 2620
}


igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2621 2622 2623 2624 2625
/*
  Assigned specified indexes for a table into key cache

  SYNOPSIS
    mysql_assign_to_keycache()
2626 2627
    thd		Thread object
    tables	Table list (one table only)
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2628 2629

  RETURN VALUES
2630 2631
   FALSE ok
   TRUE  error
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2632 2633
*/

2634
bool mysql_assign_to_keycache(THD* thd, TABLE_LIST* tables,
2635
			     LEX_STRING *key_cache_name)
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2636
{
2637
  HA_CHECK_OPT check_opt;
2638
  KEY_CACHE *key_cache;
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2639
  DBUG_ENTER("mysql_assign_to_keycache");
2640 2641 2642 2643 2644 2645 2646

  check_opt.init();
  pthread_mutex_lock(&LOCK_global_system_variables);
  if (!(key_cache= get_key_cache(key_cache_name)))
  {
    pthread_mutex_unlock(&LOCK_global_system_variables);
    my_error(ER_UNKNOWN_KEY_CACHE, MYF(0), key_cache_name->str);
2647
    DBUG_RETURN(TRUE);
2648 2649 2650 2651
  }
  pthread_mutex_unlock(&LOCK_global_system_variables);
  check_opt.key_cache= key_cache;
  DBUG_RETURN(mysql_admin_table(thd, tables, &check_opt,
2652
				"assign_to_keycache", TL_READ_NO_INSERT, 0, 0,
2653
				0, 0, &handler::assign_to_keycache, 0));
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2654 2655
}

igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2656 2657 2658 2659 2660 2661

/*
  Reassign all tables assigned to a key cache to another key cache

  SYNOPSIS
    reassign_keycache_tables()
2662 2663 2664
    thd		Thread object
    src_cache	Reference to the key cache to clean up
    dest_cache	New key cache
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2665

2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678
  NOTES
    This is called when one sets a key cache size to zero, in which
    case we have to move the tables associated to this key cache to
    the "default" one.

    One has to ensure that one never calls this function while
    some other thread is changing the key cache. This is assured by
    the caller setting src_cache->in_init before calling this function.

    We don't delete the old key cache as there may still be pointers pointing
    to it for a while after this function returns.

 RETURN VALUES
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2679 2680 2681
    0	  ok
*/

2682 2683
int reassign_keycache_tables(THD *thd, KEY_CACHE *src_cache,
			     KEY_CACHE *dst_cache)
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2684 2685 2686
{
  DBUG_ENTER("reassign_keycache_tables");

2687 2688
  DBUG_ASSERT(src_cache != dst_cache);
  DBUG_ASSERT(src_cache->in_init);
2689
  src_cache->param_buff_size= 0;		// Free key cache
2690 2691
  ha_resize_key_cache(src_cache);
  ha_change_key_cache(src_cache, dst_cache);
2692
  DBUG_RETURN(0);
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2693 2694 2695
}


igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2696 2697 2698 2699 2700
/*
  Preload specified indexes for a table into key cache

  SYNOPSIS
    mysql_preload_keys()
2701 2702
    thd		Thread object
    tables	Table list (one table only)
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2703 2704

  RETURN VALUES
2705 2706
    FALSE ok
    TRUE  error
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2707 2708
*/

2709
bool mysql_preload_keys(THD* thd, TABLE_LIST* tables)
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2710 2711 2712
{
  DBUG_ENTER("mysql_preload_keys");
  DBUG_RETURN(mysql_admin_table(thd, tables, 0,
2713
				"preload_keys", TL_READ, 0, 0, 0, 0,
2714
				&handler::preload_keys, 0));
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2715 2716 2717
}


venu@myvenu.com's avatar
venu@myvenu.com committed
2718 2719 2720 2721 2722
/*
  Create a table identical to the specified table

  SYNOPSIS
    mysql_create_like_table()
2723
    thd		Thread object
2724 2725
    table       Table list element for target table
    src_table   Table list element for source table
venu@myvenu.com's avatar
venu@myvenu.com committed
2726 2727 2728 2729
    create_info Create info
    table_ident Src table_ident

  RETURN VALUES
2730 2731
    FALSE OK
    TRUE  error
venu@myvenu.com's avatar
venu@myvenu.com committed
2732 2733
*/

2734 2735
bool mysql_create_like_table(THD* thd, TABLE_LIST* table, TABLE_LIST *src_table,
                             HA_CREATE_INFO *create_info)
venu@myvenu.com's avatar
venu@myvenu.com committed
2736 2737 2738 2739
{
  TABLE **tmp_table;
  char src_path[FN_REFLEN], dst_path[FN_REFLEN];
  char *db= table->db;
2740
  char *table_name= table->table_name;
2741 2742
  int  err;
  bool res= TRUE;
2743
  db_type not_used;
venu@myvenu.com's avatar
venu@myvenu.com committed
2744 2745 2746
  DBUG_ENTER("mysql_create_like_table");

  /*
2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761
    By taking name-lock on the source table and holding LOCK_open mutex we
    ensure that no concurrent DDL operation will mess with this table. Note
    that holding only name-lock is not enough for this, because it won't block
    other DDL statements that only take name-locks on the table and don't
    open it (simple name-locks are not exclusive between each other).

    Unfortunately, simply opening this table is not enough for our purproses,
    since in 5.0 ALTER TABLE may change .FRM files on disk even if there are
    connections that still have old version of table open. This 'optimization'
    was removed in 5.1 so there we open the source table instead of taking
    name-lock on it.

    We also have to acquire LOCK_open to make copying of .frm file, call to
    ha_create_table() and binlogging atomic against concurrent DML and DDL
    operations on the target table.
venu@myvenu.com's avatar
venu@myvenu.com committed
2762
  */
2763
  if (lock_and_wait_for_table_name(thd, src_table))
2764
    goto err;
venu@myvenu.com's avatar
venu@myvenu.com committed
2765

2766 2767 2768 2769
  pthread_mutex_lock(&LOCK_open);

  if ((tmp_table= find_temporary_table(thd, src_table->db,
                                       src_table->table_name)))
2770
    strxmov(src_path, (*tmp_table)->s->path, reg_ext, NullS);
venu@myvenu.com's avatar
venu@myvenu.com committed
2771 2772
  else
  {
2773 2774
    strxmov(src_path, mysql_data_home, "/", src_table->db, "/",
            src_table->table_name, reg_ext, NullS);
2775 2776
    /* Resolve symlinks (for windows) */
    fn_format(src_path, src_path, "", "", MYF(MY_UNPACK_FILENAME));
venu@myvenu.com's avatar
venu@myvenu.com committed
2777 2778
    if (access(src_path, F_OK))
    {
2779
      my_error(ER_BAD_TABLE_ERROR, MYF(0), src_table->table_name);
2780
      goto err;
venu@myvenu.com's avatar
venu@myvenu.com committed
2781 2782 2783
    }
  }

2784 2785 2786
  /* 
     create like should be not allowed for Views, Triggers, ... 
  */
2787
  if (mysql_frm_type(thd, src_path, &not_used) != FRMTYPE_TABLE)
2788
  {
2789 2790
    my_error(ER_WRONG_OBJECT, MYF(0), src_table->db, src_table->table_name,
             "BASE TABLE");
2791 2792 2793
    goto err;
  }

2794 2795
  DBUG_EXECUTE_IF("sleep_create_like_before_check_if_exists", my_sleep(6000000););

venu@myvenu.com's avatar
venu@myvenu.com committed
2796 2797 2798
  /*
    Validate the destination table

2799
    skip the destination table name checking as this is already
venu@myvenu.com's avatar
venu@myvenu.com committed
2800 2801 2802 2803 2804 2805
    validated.
  */
  if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
  {
    if (find_temporary_table(thd, db, table_name))
      goto table_exists;
2806
    set_tmp_file_path(dst_path, sizeof(dst_path), thd);
venu@myvenu.com's avatar
venu@myvenu.com committed
2807 2808 2809 2810
    create_info->table_options|= HA_CREATE_DELAY_KEY_WRITE;
  }
  else
  {
2811 2812 2813
    strxmov(dst_path, mysql_data_home, "/", db, "/", table_name,
	    reg_ext, NullS);
    fn_format(dst_path, dst_path, "", "", MYF(MY_UNPACK_FILENAME));
dlenev@mockturtle.local's avatar
dlenev@mockturtle.local committed
2814 2815

    /*
2816 2817
      Note that starting from 5.1 we obtain name-lock on target
      table instead of inspecting table cache for presence
dlenev@mockturtle.local's avatar
dlenev@mockturtle.local committed
2818 2819
      of open placeholders (see comment in mysql_create_table()).
    */
2820 2821
    if (table_cache_has_open_placeholder(thd, db, table_name) ||
        !access(dst_path, F_OK))
venu@myvenu.com's avatar
venu@myvenu.com committed
2822 2823 2824
      goto table_exists;
  }

2825 2826
  DBUG_EXECUTE_IF("sleep_create_like_before_copy", my_sleep(6000000););

2827
  /*
venu@myvenu.com's avatar
venu@myvenu.com committed
2828
    Create a new table by copying from source table
2829
  */
2830 2831 2832 2833 2834 2835
  if (my_copy(src_path, dst_path, MYF(MY_DONT_OVERWRITE_FILE)))
  {
    if (my_errno == ENOENT)
      my_error(ER_BAD_DB_ERROR,MYF(0),db);
    else
      my_error(ER_CANT_CREATE_FILE,MYF(0),dst_path,my_errno);
2836
    goto err;
2837
  }
venu@myvenu.com's avatar
venu@myvenu.com committed
2838

2839 2840
  DBUG_EXECUTE_IF("sleep_create_like_before_ha_create", my_sleep(6000000););

venu@myvenu.com's avatar
venu@myvenu.com committed
2841
  /*
2842 2843
    As mysql_truncate don't work on a new table at this stage of
    creation, instead create the table directly (for both normal
venu@myvenu.com's avatar
venu@myvenu.com committed
2844 2845
    and temporary tables).
  */
2846
  *fn_ext(dst_path)= 0;
gkodinov/kgeorge@magare.gmz's avatar
gkodinov/kgeorge@magare.gmz committed
2847 2848
  if (thd->variables.keep_files_on_create)
    create_info->options|= HA_CREATE_KEEP_FILES;
venu@myvenu.com's avatar
venu@myvenu.com committed
2849
  err= ha_create_table(dst_path, create_info, 1);
2850

venu@myvenu.com's avatar
venu@myvenu.com committed
2851 2852 2853 2854
  if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
  {
    if (err || !open_temporary_table(thd, dst_path, db, table_name, 1))
    {
2855 2856
      (void) rm_temporary_table(create_info->db_type,
				dst_path); /* purecov: inspected */
2857
      goto err;     /* purecov: inspected */
venu@myvenu.com's avatar
venu@myvenu.com committed
2858 2859 2860 2861
    }
  }
  else if (err)
  {
2862 2863 2864
    (void) quick_rm_table(create_info->db_type, db,
			  table_name); /* purecov: inspected */
    goto err;	    /* purecov: inspected */
venu@myvenu.com's avatar
venu@myvenu.com committed
2865
  }
2866

2867 2868
  DBUG_EXECUTE_IF("sleep_create_like_before_binlogging", my_sleep(6000000););

2869 2870
  // Must be written before unlock
  if (mysql_bin_log.is_open())
Sinisa@sinisa.nasamreza.org's avatar
Sinisa@sinisa.nasamreza.org committed
2871
  {
2872
    thd->clear_error();
2873
    Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
2874
    mysql_bin_log.write(&qinfo);
Sinisa@sinisa.nasamreza.org's avatar
Sinisa@sinisa.nasamreza.org committed
2875
  }
2876
  res= FALSE;
2877
  goto err;
2878

venu@myvenu.com's avatar
venu@myvenu.com committed
2879 2880 2881 2882
table_exists:
  if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
  {
    char warn_buff[MYSQL_ERRMSG_SIZE];
2883 2884
    my_snprintf(warn_buff, sizeof(warn_buff),
		ER(ER_TABLE_EXISTS_ERROR), table_name);
2885
    push_warning(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
2886
		 ER_TABLE_EXISTS_ERROR,warn_buff);
2887
    res= FALSE;
venu@myvenu.com's avatar
venu@myvenu.com committed
2888
  }
2889 2890 2891 2892
  else
    my_error(ER_TABLE_EXISTS_ERROR, MYF(0), table_name);

err:
2893
  unlock_table_name(thd, src_table);
2894 2895
  pthread_mutex_unlock(&LOCK_open);
  DBUG_RETURN(res);
venu@myvenu.com's avatar
venu@myvenu.com committed
2896 2897 2898
}


2899
bool mysql_analyze_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT* check_opt)
2900
{
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2901 2902 2903 2904 2905 2906
#ifdef OS2
  thr_lock_type lock_type = TL_WRITE;
#else
  thr_lock_type lock_type = TL_READ_NO_INSERT;
#endif

2907 2908
  DBUG_ENTER("mysql_analyze_table");
  DBUG_RETURN(mysql_admin_table(thd, tables, check_opt,
2909
				"analyze", lock_type, 1, 0, 0, 0,
2910
				&handler::analyze, 0));
2911 2912 2913
}


2914
bool mysql_check_table(THD* thd, TABLE_LIST* tables,HA_CHECK_OPT* check_opt)
2915
{
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2916 2917 2918 2919 2920 2921
#ifdef OS2
  thr_lock_type lock_type = TL_WRITE;
#else
  thr_lock_type lock_type = TL_READ_NO_INSERT;
#endif

2922 2923
  DBUG_ENTER("mysql_check_table");
  DBUG_RETURN(mysql_admin_table(thd, tables, check_opt,
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2924
				"check", lock_type,
2925
				0, 0, HA_OPEN_FOR_REPAIR, 0,
2926
				&handler::ha_check, &view_checksum));
2927 2928
}

monty@mysql.com's avatar
monty@mysql.com committed
2929

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2930
/* table_list should contain just one table */
monty@mysql.com's avatar
monty@mysql.com committed
2931 2932 2933 2934
static int
mysql_discard_or_import_tablespace(THD *thd,
                                   TABLE_LIST *table_list,
                                   enum tablespace_op_type tablespace_op)
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2935 2936 2937 2938 2939 2940
{
  TABLE *table;
  my_bool discard;
  int error;
  DBUG_ENTER("mysql_discard_or_import_tablespace");

monty@mysql.com's avatar
monty@mysql.com committed
2941 2942 2943 2944
  /*
    Note that DISCARD/IMPORT TABLESPACE always is the only operation in an
    ALTER TABLE
  */
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2945 2946 2947

  thd->proc_info="discard_or_import_tablespace";

monty@mysql.com's avatar
monty@mysql.com committed
2948
  discard= test(tablespace_op == DISCARD_TABLESPACE);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2949

monty@mysql.com's avatar
monty@mysql.com committed
2950 2951 2952 2953 2954
 /*
   We set this flag so that ha_innobase::open and ::external_lock() do
   not complain when we lock the table
 */
  thd->tablespace_op= TRUE;
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2955 2956 2957 2958 2959
  if (!(table=open_ltable(thd,table_list,TL_WRITE)))
  {
    thd->tablespace_op=FALSE;
    DBUG_RETURN(-1);
  }
2960

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2961 2962 2963 2964 2965 2966 2967
  error=table->file->discard_or_import_tablespace(discard);

  thd->proc_info="end";

  if (error)
    goto err;

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2968 2969 2970 2971
  /*
    The 0 in the call below means 'not in a transaction', which means
    immediate invalidation; that is probably what we wish here
  */
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  query_cache_invalidate3(thd, table_list, 0);

  /* The ALTER TABLE is always in its own transaction */
  error = ha_commit_stmt(thd);
  if (ha_commit(thd))
    error=1;
  if (error)
    goto err;
  if (mysql_bin_log.is_open())
  {
2982
    Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
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2983 2984 2985 2986
    mysql_bin_log.write(&qinfo);
  }
err:
  close_thread_tables(thd);
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2987
  thd->tablespace_op=FALSE;
2988
  
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2989 2990
  if (error == 0)
  {
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2991
    send_ok(thd);
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2992
    DBUG_RETURN(0);
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2993
  }
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heikki@hundin.mysql.fi committed
2994

2995 2996
  table->file->print_error(error, MYF(0));
    
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2997
  DBUG_RETURN(-1);
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2998
}
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2999

3000

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andrey@example.com committed
3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039
/*
  Manages enabling/disabling of indexes for ALTER TABLE

  SYNOPSIS
    alter_table_manage_keys()
      table                  Target table
      indexes_were_disabled  Whether the indexes of the from table
                             were disabled
      keys_onoff             ENABLE | DISABLE | LEAVE_AS_IS

  RETURN VALUES
    FALSE  OK
    TRUE   Error
*/

static
bool alter_table_manage_keys(TABLE *table, int indexes_were_disabled,
                             enum enum_enable_or_disable keys_onoff)
{
  int error= 0;
  DBUG_ENTER("alter_table_manage_keys");
  DBUG_PRINT("enter", ("table=%p were_disabled=%d on_off=%d",
             table, indexes_were_disabled, keys_onoff));

  switch (keys_onoff) {
  case ENABLE:
    error= table->file->enable_indexes(HA_KEY_SWITCH_NONUNIQ_SAVE);
    break;
  case LEAVE_AS_IS:
    if (!indexes_were_disabled)
      break;
    /* fall-through: disabled indexes */
  case DISABLE:
    error= table->file->disable_indexes(HA_KEY_SWITCH_NONUNIQ_SAVE);
  }

  if (error == HA_ERR_WRONG_COMMAND)
  {
    push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
3040
                        ER_ILLEGAL_HA, ER(ER_ILLEGAL_HA), table->s->table_name);
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3041 3042 3043 3044 3045 3046 3047 3048
    error= 0;
  } else if (error)
    table->file->print_error(error, MYF(0));

  DBUG_RETURN(error);
}


3049 3050
/*
  Alter table
3051 3052 3053 3054 3055 3056 3057


  NOTE
    The structures passed as 'create_info' and 'alter_info' parameters may
    be modified by this function. It is responsibility of the caller to make
    a copy of create_info in order to provide correct execution in prepared
    statements/stored routines.
3058
*/
3059

3060 3061 3062
bool mysql_alter_table(THD *thd,char *new_db, char *new_name,
                       HA_CREATE_INFO *create_info,
                       TABLE_LIST *table_list,
3063
                       Alter_info *alter_info,
3064
                       uint order_num, ORDER *order, bool ignore)
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3065
{
3066
  TABLE *table,*new_table=0;
3067
  int error= 0;
3068 3069
  char tmp_name[80],old_name[32],new_name_buff[FN_REFLEN];
  char new_alias_buff[FN_REFLEN], *table_name, *db, *new_alias, *alias;
3070
  char index_file[FN_REFLEN], data_file[FN_REFLEN];
3071 3072
  ha_rows copied,deleted;
  ulonglong next_insert_id;
3073
  uint db_create_options, used_fields;
3074
  enum db_type old_db_type, new_db_type, table_type;
3075
  bool need_copy_table;
3076
  bool no_table_reopen= FALSE, varchar= FALSE;
3077
  frm_type_enum frm_type;
3078 3079 3080 3081 3082 3083 3084 3085 3086 3087
  /*
    Throw an error if the table to be altered isn't empty.
    Used in DATE/DATETIME fields default value checking.
  */
  bool error_if_not_empty= FALSE;
  /*
    A field used for error reporting in DATE/DATETIME fields default
    value checking.
  */
  create_field *new_datetime_field= 0;
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3088 3089 3090
  DBUG_ENTER("mysql_alter_table");

  thd->proc_info="init";
3091
  table_name=table_list->table_name;
3092 3093
  alias= (lower_case_table_names == 2) ? table_list->alias : table_name;

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3094
  db=table_list->db;
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3095
  if (!new_db || !my_strcasecmp(table_alias_charset, new_db, db))
3096
    new_db= db;
3097
  used_fields=create_info->used_fields;
3098
  
3099
  mysql_ha_flush(thd, table_list, MYSQL_HA_CLOSE_FINAL, FALSE);
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3100

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3101
  /* DISCARD/IMPORT TABLESPACE is always alone in an ALTER TABLE */
3102
  if (alter_info->tablespace_op != NO_TABLESPACE_OP)
3103
    /* Conditionally writes to binlog. */
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3104
    DBUG_RETURN(mysql_discard_or_import_tablespace(thd,table_list,
3105
						   alter_info->tablespace_op));
3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127
  sprintf(new_name_buff,"%s/%s/%s%s",mysql_data_home, db, table_name, reg_ext);
  unpack_filename(new_name_buff, new_name_buff);
  frm_type= mysql_frm_type(thd, new_name_buff, &table_type);
  /* Rename a view */
  if (frm_type == FRMTYPE_VIEW && !(alter_info->flags & ~ALTER_RENAME))
  {
    /*
      Avoid problems with a rename on a table that we have locked or
      if the user is trying to to do this in a transcation context
    */

    if (thd->locked_tables || thd->active_transaction())
    {
      my_message(ER_LOCK_OR_ACTIVE_TRANSACTION,
                 ER(ER_LOCK_OR_ACTIVE_TRANSACTION), MYF(0));
      DBUG_RETURN(1);
    }

    if (wait_if_global_read_lock(thd,0,1))
      DBUG_RETURN(1);
    VOID(pthread_mutex_lock(&LOCK_open));
    if (lock_table_names(thd, table_list))
3128 3129
    {
      error= 1;
3130
      goto view_err;
3131
    }
3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150
    
    if (!do_rename(thd, table_list, new_db, new_name, new_name, 1))
    {
      if (mysql_bin_log.is_open())
      {
        thd->clear_error();
        Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
        mysql_bin_log.write(&qinfo);
      }
      send_ok(thd);
    }

    unlock_table_names(thd, table_list, (TABLE_LIST*) 0);

view_err:
    pthread_mutex_unlock(&LOCK_open);
    start_waiting_global_read_lock(thd);
    DBUG_RETURN(error);
  }
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3151
  if (!(table=open_ltable(thd,table_list,TL_WRITE_ALLOW_READ)))
3152
    DBUG_RETURN(TRUE);
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3153 3154 3155 3156 3157

  /* Check that we are not trying to rename to an existing table */
  if (new_name)
  {
    strmov(new_name_buff,new_name);
3158
    strmov(new_alias= new_alias_buff, new_name);
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3159
    if (lower_case_table_names)
3160 3161 3162
    {
      if (lower_case_table_names != 2)
      {
3163
	my_casedn_str(files_charset_info, new_name_buff);
3164 3165
	new_alias= new_name;			// Create lower case table name
      }
3166
      my_casedn_str(files_charset_info, new_name);
3167
    }
3168
    if (new_db == db &&
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3169
	!my_strcasecmp(table_alias_charset, new_name_buff, table_name))
3170 3171
    {
      /*
3172 3173
	Source and destination table names are equal: make later check
	easier.
3174
      */
3175
      new_alias= new_name= table_name;
3176
    }
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    else
    {
3179
      if (table->s->tmp_table)
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3180 3181 3182
      {
	if (find_temporary_table(thd,new_db,new_name_buff))
	{
3183
	  my_error(ER_TABLE_EXISTS_ERROR, MYF(0), new_name_buff);
3184
	  DBUG_RETURN(TRUE);
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3185 3186 3187 3188
	}
      }
      else
      {
3189
	char dir_buff[FN_REFLEN];
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3190
        bool exists;
3191
	strxnmov(dir_buff, FN_REFLEN, mysql_real_data_home, new_db, NullS);
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3192 3193 3194 3195 3196 3197
        VOID(pthread_mutex_lock(&LOCK_open));
        exists= (table_cache_has_open_placeholder(thd, new_db, new_name) ||
                 !access(fn_format(new_name_buff, new_name_buff, dir_buff,
                                   reg_ext, 0), F_OK));
        VOID(pthread_mutex_unlock(&LOCK_open));
        if (exists)
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3198 3199
	{
	  /* Table will be closed in do_command() */
3200
	  my_error(ER_TABLE_EXISTS_ERROR, MYF(0), new_alias);
3201
	  DBUG_RETURN(TRUE);
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3202 3203 3204 3205 3206
	}
      }
    }
  }
  else
3207 3208 3209 3210
  {
    new_alias= (lower_case_table_names == 2) ? alias : table_name;
    new_name= table_name;
  }
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3211

3212
  old_db_type= table->s->db_type;
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3213
  if (create_info->db_type == DB_TYPE_DEFAULT)
3214
    create_info->db_type= old_db_type;
3215 3216 3217
  if (check_engine(thd, new_name, &create_info->db_type))
    DBUG_RETURN(TRUE);
  new_db_type= create_info->db_type;
3218
  if (create_info->row_type == ROW_TYPE_NOT_USED)
3219
    create_info->row_type= table->s->row_type;
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3220

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3221 3222
  DBUG_PRINT("info", ("old type: %d  new type: %d", old_db_type, new_db_type));
  if (ha_check_storage_engine_flag(old_db_type, HTON_ALTER_NOT_SUPPORTED) ||
3223
      ha_check_storage_engine_flag(new_db_type, HTON_ALTER_NOT_SUPPORTED))
3224 3225 3226 3227 3228 3229
  {
    DBUG_PRINT("info", ("doesn't support alter"));
    my_error(ER_ILLEGAL_HA, MYF(0), table_name);
    DBUG_RETURN(TRUE);
  }
  
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3230
  thd->proc_info="setup";
3231
  if (!(alter_info->flags & ~(ALTER_RENAME | ALTER_KEYS_ONOFF)) &&
3232
      !table->s->tmp_table) // no need to touch frm
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3233
  {
3234 3235 3236 3237
    switch (alter_info->keys_onoff) {
    case LEAVE_AS_IS:
      break;
    case ENABLE:
3238 3239 3240 3241 3242 3243 3244 3245 3246 3247
      /*
        wait_while_table_is_used() ensures that table being altered is
        opened only by this thread and that TABLE::TABLE_SHARE::version
        of TABLE object corresponding to this table is 0.
        The latter guarantees that no DML statement will open this table
        until ALTER TABLE finishes (i.e. until close_thread_tables())
        while the fact that the table is still open gives us protection
        from concurrent DDL statements.
      */
      VOID(pthread_mutex_lock(&LOCK_open));
3248
      wait_while_table_is_used(thd, table, HA_EXTRA_FORCE_REOPEN);
3249
      VOID(pthread_mutex_unlock(&LOCK_open));
3250 3251 3252 3253
      error= table->file->enable_indexes(HA_KEY_SWITCH_NONUNIQ_SAVE);
      /* COND_refresh will be signaled in close_thread_tables() */
      break;
    case DISABLE:
3254
      VOID(pthread_mutex_lock(&LOCK_open));
3255
      wait_while_table_is_used(thd, table, HA_EXTRA_FORCE_REOPEN);
3256
      VOID(pthread_mutex_unlock(&LOCK_open));
3257 3258 3259 3260 3261 3262
      error=table->file->disable_indexes(HA_KEY_SWITCH_NONUNIQ_SAVE);
      /* COND_refresh will be signaled in close_thread_tables() */
      break;
    }
    if (error == HA_ERR_WRONG_COMMAND)
    {
3263
      error= 0;
3264 3265 3266 3267 3268
      push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
			  ER_ILLEGAL_HA, ER(ER_ILLEGAL_HA),
			  table->alias);
    }

3269 3270 3271 3272 3273 3274 3275 3276 3277 3278
    VOID(pthread_mutex_lock(&LOCK_open));
    /*
      Unlike to the above case close_cached_table() below will remove ALL
      instances of TABLE from table cache (it will also remove table lock
      held by this thread). So to make actual table renaming and writing
      to binlog atomic we have to put them into the same critical section
      protected by LOCK_open mutex. This also removes gap for races between
      access() and mysql_rename_table() calls.
    */

3279
    if (!error && (new_name != table_name || new_db != db))
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bk@work.mysql.com committed
3280
    {
3281
      thd->proc_info="rename";
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dlenev@mockturtle.local committed
3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297
      /*
        Then do a 'simple' rename of the table. First we need to close all
        instances of 'source' table.
      */
      close_cached_table(thd, table);
      /*
        Then, we want check once again that target table does not exist.
        Note that we can't fully rely on results of previous check since
        no lock was taken on target table during it. We also can't do this
        before calling close_cached_table() as the latter temporarily
        releases LOCK_open mutex.
        Also note that starting from 5.1 we use approach with obtaining
        of name-lock on target table.
      */
      if (table_cache_has_open_placeholder(thd, new_db, new_name) ||
          !access(new_name_buff,F_OK))
3298
      {
3299
	my_error(ER_TABLE_EXISTS_ERROR, MYF(0), new_name);
3300
	error= -1;
3301 3302 3303
      }
      else
      {
3304 3305
	*fn_ext(new_name)=0;
	if (mysql_rename_table(old_db_type,db,table_name,new_db,new_alias))
3306
	  error= -1;
3307 3308 3309 3310 3311 3312 3313
        else if (Table_triggers_list::change_table_name(thd, db, table_name,
                                                        new_db, new_alias))
        {
          VOID(mysql_rename_table(old_db_type, new_db, new_alias, db,
                                  table_name));
          error= -1;
        }
3314
      }
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3315
    }
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heikki@hundin.mysql.fi committed
3316

3317
    if (error == HA_ERR_WRONG_COMMAND)
serg@serg.mylan's avatar
serg@serg.mylan committed
3318
    {
3319
      error= 0;
serg@serg.mylan's avatar
serg@serg.mylan committed
3320
      push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
3321
			  ER_ILLEGAL_HA, ER(ER_ILLEGAL_HA),
3322
			  table->alias);
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serg@serg.mylan committed
3323
    }
3324

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3325 3326
    if (!error)
    {
3327 3328
      if (mysql_bin_log.is_open())
      {
3329
	thd->clear_error();
3330
	Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
3331 3332
	mysql_bin_log.write(&qinfo);
      }
3333
      send_ok(thd);
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bk@work.mysql.com committed
3334
    }
3335
    else if (error > 0)
3336 3337
    {
      table->file->print_error(error, MYF(0));
3338
      error= -1;
3339
    }
3340
    VOID(pthread_mutex_unlock(&LOCK_open));
3341
    table_list->table= NULL;                    // For query cache
3342
    query_cache_invalidate3(thd, table_list, 0);
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3343 3344 3345 3346
    DBUG_RETURN(error);
  }

  /* Full alter table */
3347

3348
  /* Let new create options override the old ones */
3349
  if (!(used_fields & HA_CREATE_USED_MIN_ROWS))
3350
    create_info->min_rows= table->s->min_rows;
3351
  if (!(used_fields & HA_CREATE_USED_MAX_ROWS))
3352
    create_info->max_rows= table->s->max_rows;
3353
  if (!(used_fields & HA_CREATE_USED_AVG_ROW_LENGTH))
3354
    create_info->avg_row_length= table->s->avg_row_length;
3355
  if (!(used_fields & HA_CREATE_USED_DEFAULT_CHARSET))
3356
    create_info->default_table_charset= table->s->table_charset;
3357 3358 3359 3360 3361 3362
  if (!(used_fields & HA_CREATE_USED_AUTO) && table->found_next_number_field)
  {
    /* Table has an autoincrement, copy value to new table */
    table->file->info(HA_STATUS_AUTO);
    create_info->auto_increment_value= table->file->auto_increment_value;
  }
3363

3364
  restore_record(table, s->default_values);     // Empty record for DEFAULT
3365
  List_iterator<Alter_drop> drop_it(alter_info->drop_list);
3366
  List_iterator<create_field> def_it(alter_info->create_list);
3367
  List_iterator<Alter_column> alter_it(alter_info->alter_list);
3368
  Alter_info new_info;                   // Add new columns and indexes here
3369 3370
  create_field *def;

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3371
  /*
3372
    First collect all fields from table which isn't in drop_list
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3373 3374 3375 3376 3377
  */

  Field **f_ptr,*field;
  for (f_ptr=table->field ; (field= *f_ptr) ; f_ptr++)
  {
3378 3379
    if (field->type() == MYSQL_TYPE_STRING)
      varchar= TRUE;
3380
    /* Check if field should be dropped */
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3381 3382 3383 3384 3385
    Alter_drop *drop;
    drop_it.rewind();
    while ((drop=drop_it++))
    {
      if (drop->type == Alter_drop::COLUMN &&
3386
	  !my_strcasecmp(system_charset_info,field->field_name, drop->name))
3387 3388 3389
      {
	/* Reset auto_increment value if it was dropped */
	if (MTYP_TYPENR(field->unireg_check) == Field::NEXT_NUMBER &&
3390
	    !(used_fields & HA_CREATE_USED_AUTO))
3391 3392 3393 3394
	{
	  create_info->auto_increment_value=0;
	  create_info->used_fields|=HA_CREATE_USED_AUTO;
	}
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3395
	break;
3396
      }
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    }
    if (drop)
    {
      drop_it.remove();
      continue;
    }
    /* Check if field is changed */
    def_it.rewind();
    while ((def=def_it++))
    {
3407
      if (def->change &&
3408
	  !my_strcasecmp(system_charset_info,field->field_name, def->change))
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3409 3410 3411 3412 3413
	break;
    }
    if (def)
    {						// Field is changed
      def->field=field;
3414 3415
      if (!def->after)
      {
3416
	new_info.create_list.push_back(def);
3417 3418
	def_it.remove();
      }
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3419 3420 3421
    }
    else
    {						// Use old field value
3422
      new_info.create_list.push_back(def= new create_field(field, field));
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3423 3424 3425 3426
      alter_it.rewind();			// Change default if ALTER
      Alter_column *alter;
      while ((alter=alter_it++))
      {
3427
	if (!my_strcasecmp(system_charset_info,field->field_name, alter->name))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3428 3429 3430 3431
	  break;
      }
      if (alter)
      {
3432 3433
	if (def->sql_type == FIELD_TYPE_BLOB)
	{
3434
	  my_error(ER_BLOB_CANT_HAVE_DEFAULT, MYF(0), def->change);
3435
	  DBUG_RETURN(TRUE);
3436
	}
3437 3438 3439 3440
	if ((def->def=alter->def))              // Use new default
          def->flags&= ~NO_DEFAULT_VALUE_FLAG;
        else
          def->flags|= NO_DEFAULT_VALUE_FLAG;
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3441 3442 3443 3444 3445
	alter_it.remove();
      }
    }
  }
  def_it.rewind();
3446
  List_iterator<create_field> find_it(new_info.create_list);
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bk@work.mysql.com committed
3447 3448
  while ((def=def_it++))			// Add new columns
  {
3449
    if (def->change && ! def->field)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3450
    {
3451
      my_error(ER_BAD_FIELD_ERROR, MYF(0), def->change, table_name);
3452
      DBUG_RETURN(TRUE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3453
    }
3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469
    /*
      Check that the DATE/DATETIME not null field we are going to add is
      either has a default value or the '0000-00-00' is allowed by the
      set sql mode.
      If the '0000-00-00' value isn't allowed then raise the error_if_not_empty
      flag to allow ALTER TABLE only if the table to be altered is empty.
    */
    if ((def->sql_type == MYSQL_TYPE_DATE ||
         def->sql_type == MYSQL_TYPE_NEWDATE ||
         def->sql_type == MYSQL_TYPE_DATETIME) && !new_datetime_field &&
         !(~def->flags & (NO_DEFAULT_VALUE_FLAG | NOT_NULL_FLAG)) &&
         thd->variables.sql_mode & MODE_NO_ZERO_DATE)
    {
        new_datetime_field= def;
        error_if_not_empty= TRUE;
    }
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bk@work.mysql.com committed
3470
    if (!def->after)
3471
      new_info.create_list.push_back(def);
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bk@work.mysql.com committed
3472
    else if (def->after == first_keyword)
3473
      new_info.create_list.push_front(def);
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3474 3475 3476 3477 3478 3479
    else
    {
      create_field *find;
      find_it.rewind();
      while ((find=find_it++))			// Add new columns
      {
3480
	if (!my_strcasecmp(system_charset_info,def->after, find->field_name))
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bk@work.mysql.com committed
3481 3482 3483 3484
	  break;
      }
      if (!find)
      {
3485
	my_error(ER_BAD_FIELD_ERROR, MYF(0), def->after, table_name);
3486
	DBUG_RETURN(TRUE);
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bk@work.mysql.com committed
3487 3488 3489 3490
      }
      find_it.after(def);			// Put element after this
    }
  }
3491
  if (alter_info->alter_list.elements)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3492
  {
3493 3494
    my_error(ER_BAD_FIELD_ERROR, MYF(0),
             alter_info->alter_list.head()->name, table_name);
3495
    DBUG_RETURN(TRUE);
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bk@work.mysql.com committed
3496
  }
3497
  if (!new_info.create_list.elements)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3498
  {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3499 3500
    my_message(ER_CANT_REMOVE_ALL_FIELDS, ER(ER_CANT_REMOVE_ALL_FIELDS),
               MYF(0));
3501
    DBUG_RETURN(TRUE);
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bk@work.mysql.com committed
3502 3503 3504
  }

  /*
3505 3506
    Collect all keys which isn't in drop list. Add only those
    for which some fields exists.
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3507 3508
  */

3509 3510
  List_iterator<Key> key_it(alter_info->key_list);
  List_iterator<create_field> field_it(new_info.create_list);
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3511 3512 3513
  List<key_part_spec> key_parts;

  KEY *key_info=table->key_info;
3514
  for (uint i=0 ; i < table->s->keys ; i++,key_info++)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3515
  {
3516
    char *key_name= key_info->name;
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bk@work.mysql.com committed
3517 3518 3519 3520 3521
    Alter_drop *drop;
    drop_it.rewind();
    while ((drop=drop_it++))
    {
      if (drop->type == Alter_drop::KEY &&
3522
	  !my_strcasecmp(system_charset_info,key_name, drop->name))
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bk@work.mysql.com committed
3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543
	break;
    }
    if (drop)
    {
      drop_it.remove();
      continue;
    }

    KEY_PART_INFO *key_part= key_info->key_part;
    key_parts.empty();
    for (uint j=0 ; j < key_info->key_parts ; j++,key_part++)
    {
      if (!key_part->field)
	continue;				// Wrong field (from UNIREG)
      const char *key_part_name=key_part->field->field_name;
      create_field *cfield;
      field_it.rewind();
      while ((cfield=field_it++))
      {
	if (cfield->change)
	{
3544 3545
	  if (!my_strcasecmp(system_charset_info, key_part_name,
			     cfield->change))
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bk@work.mysql.com committed
3546 3547
	    break;
	}
3548
	else if (!my_strcasecmp(system_charset_info,
3549
				key_part_name, cfield->field_name))
3550
	  break;
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bk@work.mysql.com committed
3551 3552 3553 3554 3555
      }
      if (!cfield)
	continue;				// Field is removed
      uint key_part_length=key_part->length;
      if (cfield->field)			// Not new field
3556 3557 3558 3559 3560 3561 3562
      {
        /*
          If the field can't have only a part used in a key according to its
          new type, or should not be used partially according to its
          previous type, or the field length is less than the key part
          length, unset the key part length.

3563 3564 3565
          We also unset the key part length if it is the same as the
          old field's length, so the whole new field will be used.

3566 3567 3568 3569
          BLOBs may have cfield->length == 0, which is why we test it before
          checking whether cfield->length < key_part_length (in chars).
         */
        if (!Field::type_can_have_key_part(cfield->field->type()) ||
3570
            !Field::type_can_have_key_part(cfield->sql_type) ||
bar@mysql.com's avatar
bar@mysql.com committed
3571 3572
            (cfield->field->field_length == key_part_length &&
             !f_is_blob(key_part->key_type)) ||
3573 3574 3575
	    (cfield->length && (cfield->length < key_part_length /
                                key_part->field->charset()->mbmaxlen)))
	  key_part_length= 0;			// Use whole field
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bk@work.mysql.com committed
3576
      }
3577
      key_part_length /= key_part->field->charset()->mbmaxlen;
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bk@work.mysql.com committed
3578 3579 3580 3581
      key_parts.push_back(new key_part_spec(cfield->field_name,
					    key_part_length));
    }
    if (key_parts.elements)
3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605
    {
      Key *key;
      enum Key::Keytype key_type;

      if (key_info->flags & HA_SPATIAL)
        key_type= Key::SPATIAL;
      else if (key_info->flags & HA_NOSAME)
      {
        if (! my_strcasecmp(system_charset_info, key_name, primary_key_name))
          key_type= Key::PRIMARY;
        else
          key_type= Key::UNIQUE;
      }
      else if (key_info->flags & HA_FULLTEXT)
        key_type= Key::FULLTEXT;
      else
        key_type= Key::MULTIPLE;

      key= new Key(key_type, key_name,
                   key_info->algorithm,
                   test(key_info->flags & HA_GENERATED_KEY),
                   key_parts);
      new_info.key_list.push_back(key);
    }
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3606 3607 3608 3609
  }
  {
    Key *key;
    while ((key=key_it++))			// Add new keys
3610 3611
    {
      if (key->type != Key::FOREIGN_KEY)
3612
        new_info.key_list.push_back(key);
3613 3614 3615 3616
      if (key->name &&
	  !my_strcasecmp(system_charset_info,key->name,primary_key_name))
      {
	my_error(ER_WRONG_NAME_FOR_INDEX, MYF(0), key->name);
3617
	DBUG_RETURN(TRUE);
3618
      }
3619
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3620 3621
  }

3622
  if (alter_info->drop_list.elements)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3623
  {
3624 3625
    my_error(ER_CANT_DROP_FIELD_OR_KEY, MYF(0),
             alter_info->drop_list.head()->name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3626 3627
    goto err;
  }
3628
  if (alter_info->alter_list.elements)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3629
  {
3630 3631
    my_error(ER_CANT_DROP_FIELD_OR_KEY, MYF(0),
             alter_info->alter_list.head()->name);
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bk@work.mysql.com committed
3632 3633 3634
    goto err;
  }

3635
  db_create_options= table->s->db_create_options & ~(HA_OPTION_PACK_RECORD);
3636 3637
  my_snprintf(tmp_name, sizeof(tmp_name), "%s-%lx_%lx", tmp_file_prefix,
	      current_pid, thd->thread_id);
3638 3639
  /* Safety fix for innodb */
  if (lower_case_table_names)
3640
    my_casedn_str(files_charset_info, tmp_name);
3641 3642 3643 3644
  if (new_db_type != old_db_type && !table->file->can_switch_engines()) {
    my_error(ER_ROW_IS_REFERENCED, MYF(0));
    goto err;
  }
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bk@work.mysql.com committed
3645
  create_info->db_type=new_db_type;
3646 3647 3648 3649 3650
  if (!create_info->comment.str)
  {
    create_info->comment.str= table->s->comment.str;
    create_info->comment.length= table->s->comment.length;
  }
3651 3652 3653 3654 3655

  table->file->update_create_info(create_info);
  if ((create_info->table_options &
       (HA_OPTION_PACK_KEYS | HA_OPTION_NO_PACK_KEYS)) ||
      (used_fields & HA_CREATE_USED_PACK_KEYS))
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bk@work.mysql.com committed
3656 3657 3658 3659 3660 3661 3662 3663 3664 3665
    db_create_options&= ~(HA_OPTION_PACK_KEYS | HA_OPTION_NO_PACK_KEYS);
  if (create_info->table_options &
      (HA_OPTION_CHECKSUM | HA_OPTION_NO_CHECKSUM))
    db_create_options&= ~(HA_OPTION_CHECKSUM | HA_OPTION_NO_CHECKSUM);
  if (create_info->table_options &
      (HA_OPTION_DELAY_KEY_WRITE | HA_OPTION_NO_DELAY_KEY_WRITE))
    db_create_options&= ~(HA_OPTION_DELAY_KEY_WRITE |
			  HA_OPTION_NO_DELAY_KEY_WRITE);
  create_info->table_options|= db_create_options;

3666
  if (table->s->tmp_table)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3667 3668
    create_info->options|=HA_LEX_CREATE_TMP_TABLE;

3669 3670
  /*
    better have a negative test here, instead of positive, like
monty@mysql.com's avatar
monty@mysql.com committed
3671
    alter_info->flags & ALTER_ADD_COLUMN|ALTER_ADD_INDEX|...
3672
    so that ALTER TABLE won't break when somebody will add new flag
3673 3674 3675 3676 3677

    MySQL uses frm version to determine the type of the data fields and
    their layout. See Field_string::type() for details.
    Thus, if the table is too old we may have to rebuild the data to
    update the layout.
3678 3679 3680 3681 3682 3683 3684 3685

    There was a bug prior to mysql-4.0.25. Number of null fields was
    calculated incorrectly. As a result frm and data files gets out of
    sync after fast alter table. There is no way to determine by which
    mysql version (in 4.0 and 4.1 branches) table was created, thus we
    disable fast alter table for all tables created by mysql versions
    prior to 5.0 branch.
    See BUG#6236.
3686
  */
monty@mysql.com's avatar
monty@mysql.com committed
3687 3688 3689 3690
  need_copy_table= (alter_info->flags &
                    ~(ALTER_CHANGE_COLUMN_DEFAULT|ALTER_OPTIONS) ||
                    (create_info->used_fields &
                     ~(HA_CREATE_USED_COMMENT|HA_CREATE_USED_PASSWORD)) ||
3691
                    table->s->tmp_table ||
3692
                    !table->s->mysql_version ||
3693
                    (table->s->frm_version < FRM_VER_TRUE_VARCHAR && varchar));
3694 3695
  create_info->frm_only= !need_copy_table;

3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739
  /*
    Handling of symlinked tables:
    If no rename:
      Create new data file and index file on the same disk as the
      old data and index files.
      Copy data.
      Rename new data file over old data file and new index file over
      old index file.
      Symlinks are not changed.

   If rename:
      Create new data file and index file on the same disk as the
      old data and index files.  Create also symlinks to point at
      the new tables.
      Copy data.
      At end, rename temporary tables and symlinks to temporary table
      to final table name.
      Remove old table and old symlinks

    If rename is made to another database:
      Create new tables in new database.
      Copy data.
      Remove old table and symlinks.
  */

  if (!strcmp(db, new_db))		// Ignore symlink if db changed
  {
    if (create_info->index_file_name)
    {
      /* Fix index_file_name to have 'tmp_name' as basename */
      strmov(index_file, tmp_name);
      create_info->index_file_name=fn_same(index_file,
					   create_info->index_file_name,
					   1);
    }
    if (create_info->data_file_name)
    {
      /* Fix data_file_name to have 'tmp_name' as basename */
      strmov(data_file, tmp_name);
      create_info->data_file_name=fn_same(data_file,
					  create_info->data_file_name,
					  1);
    }
  }
3740 3741
  else
    create_info->data_file_name=create_info->index_file_name=0;
monty@mysql.com's avatar
monty@mysql.com committed
3742 3743

  /* We don't log the statement, it will be logged later. */
3744
  {
monty@mysql.com's avatar
monty@mysql.com committed
3745 3746
    tmp_disable_binlog(thd);
    error= mysql_create_table(thd, new_db, tmp_name,
3747
                              create_info, &new_info, 1, 0);
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monty@mysql.com committed
3748 3749
    reenable_binlog(thd);
    if (error)
3750 3751
      DBUG_RETURN(error);
  }
3752
  if (need_copy_table)
3753
  {
3754
    if (table->s->tmp_table)
3755 3756 3757 3758
    {
      TABLE_LIST tbl;
      bzero((void*) &tbl, sizeof(tbl));
      tbl.db= new_db;
3759
      tbl.table_name= tbl.alias= tmp_name;
3760 3761
      new_table= open_table(thd, &tbl, thd->mem_root, (bool*) 0,
                            MYSQL_LOCK_IGNORE_FLUSH);
3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775
    }
    else
    {
      char path[FN_REFLEN];
      my_snprintf(path, sizeof(path), "%s/%s/%s", mysql_data_home,
                  new_db, tmp_name);
      fn_format(path,path,"","",4);
      new_table=open_temporary_table(thd, path, new_db, tmp_name,0);
    }
    if (!new_table)
    {
      VOID(quick_rm_table(new_db_type,new_db,tmp_name));
      goto err;
    }
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3776 3777
  }

3778
  /* We don't want update TIMESTAMP fields during ALTER TABLE. */
3779
  thd->count_cuted_fields= CHECK_FIELD_WARN;	// calc cuted fields
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3780 3781
  thd->cuted_fields=0L;
  thd->proc_info="copy to tmp table";
3782
  next_insert_id=thd->next_insert_id;		// Remember for logging
3783
  copied=deleted=0;
3784
  if (new_table && !new_table->s->is_view)
3785
  {
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monty@mysql.com committed
3786
    new_table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
3787
    new_table->next_number_field=new_table->found_next_number_field;
3788
    error= copy_data_between_tables(table, new_table, new_info.create_list,
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kostja@bodhi.local committed
3789
                                    ignore, order_num, order,
3790 3791
                                    &copied, &deleted, alter_info->keys_onoff,
                                    error_if_not_empty);
3792
  }
3793 3794 3795 3796
  else if (!new_table)
  {
    VOID(pthread_mutex_lock(&LOCK_open));
    wait_while_table_is_used(thd, table, HA_EXTRA_FORCE_REOPEN);
3797
    VOID(pthread_mutex_unlock(&LOCK_open));
3798 3799
    alter_table_manage_keys(table, table->file->indexes_are_disabled(),
                            alter_info->keys_onoff);
3800 3801 3802
    error= ha_commit_stmt(thd);
    if (ha_commit(thd))
      error= 1;
3803 3804
  }

3805
  thd->last_insert_id=next_insert_id;		// Needed for correct log
3806
  thd->count_cuted_fields= CHECK_FIELD_IGNORE;
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bk@work.mysql.com committed
3807

3808
  if (table->s->tmp_table)
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bk@work.mysql.com committed
3809 3810 3811 3812
  {
    /* We changed a temporary table */
    if (error)
    {
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3813 3814 3815
      /*
	The following function call will free the new_table pointer,
	in close_temporary_table(), so we can safely directly jump to err
3816
      */
3817
      close_temporary_table(thd, new_db, tmp_name);
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bk@work.mysql.com committed
3818 3819
      goto err;
    }
3820 3821 3822 3823 3824 3825
    /* Close lock if this is a transactional table */
    if (thd->lock)
    {
      mysql_unlock_tables(thd, thd->lock);
      thd->lock=0;
    }
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bk@work.mysql.com committed
3826
    /* Remove link to old table and rename the new one */
3827
    close_temporary_table(thd, table->s->db, table_name);
3828 3829
    /* Should pass the 'new_name' as we store table name in the cache */
    if (rename_temporary_table(thd, new_table, new_db, new_name))
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bk@work.mysql.com committed
3830 3831 3832 3833 3834
    {						// Fatal error
      close_temporary_table(thd,new_db,tmp_name);
      my_free((gptr) new_table,MYF(0));
      goto err;
    }
3835 3836 3837 3838
    /* 
     Writing to the binlog does not need to be synchronized for temporary tables, 
     which are thread-specific. 
    */
3839 3840
    if (mysql_bin_log.is_open())
    {
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3841
      thd->clear_error();
3842
      Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
3843 3844
      mysql_bin_log.write(&qinfo);
    }
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bk@work.mysql.com committed
3845 3846 3847
    goto end_temporary;
  }

3848 3849 3850 3851 3852
  if (new_table)
  {
    intern_close_table(new_table);              /* close temporary table */
    my_free((gptr) new_table,MYF(0));
  }
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3853 3854 3855 3856 3857 3858 3859
  VOID(pthread_mutex_lock(&LOCK_open));
  if (error)
  {
    VOID(quick_rm_table(new_db_type,new_db,tmp_name));
    VOID(pthread_mutex_unlock(&LOCK_open));
    goto err;
  }
3860

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3861
  /*
3862 3863
    Data is copied.  Now we rename the old table to a temp name,
    rename the new one to the old name, remove all entries from the old table
3864
    from the cache, free all locks, close the old table and remove it.
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bk@work.mysql.com committed
3865 3866 3867
  */

  thd->proc_info="rename result table";
3868 3869
  my_snprintf(old_name, sizeof(old_name), "%s2-%lx-%lx", tmp_file_prefix,
	      current_pid, thd->thread_id);
3870 3871
  if (lower_case_table_names)
    my_casedn_str(files_charset_info, old_name);
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bk@work.mysql.com committed
3872

3873 3874 3875 3876 3877
#if (!defined( __WIN__) && !defined( __EMX__) && !defined( OS2))
  if (table->file->has_transactions())
#endif
  {
    /*
3878
      Win32 and InnoDB can't drop a table that is in use, so we must
3879
      close the original table at before doing the rename
3880
    */
3881
    close_cached_table(thd, table);
3882
    table=0;					// Marker that table is closed
3883
    no_table_reopen= TRUE;
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bk@work.mysql.com committed
3884
  }
3885 3886 3887
#if (!defined( __WIN__) && !defined( __EMX__) && !defined( OS2))
  else
    table->file->extra(HA_EXTRA_FORCE_REOPEN);	// Don't use this file anymore
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bk@work.mysql.com committed
3888 3889
#endif

dlenev@mockturtle.local's avatar
dlenev@mockturtle.local committed
3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905
  if (new_name != table_name || new_db != db)
  {
    /*
      Check that there is no table with target name. See the
      comment describing code for 'simple' ALTER TABLE ... RENAME.
    */
    if (table_cache_has_open_placeholder(thd, new_db, new_name) ||
        !access(new_name_buff,F_OK))
    {
      error=1;
      my_error(ER_TABLE_EXISTS_ERROR, MYF(0), new_name_buff);
      VOID(quick_rm_table(new_db_type,new_db,tmp_name));
      VOID(pthread_mutex_unlock(&LOCK_open));
      goto err;
    }
  }
3906

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3907
  error=0;
3908 3909
  if (!need_copy_table)
    new_db_type=old_db_type=DB_TYPE_UNKNOWN; // this type cannot happen in regular ALTER
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3910 3911 3912 3913 3914 3915
  if (mysql_rename_table(old_db_type,db,table_name,db,old_name))
  {
    error=1;
    VOID(quick_rm_table(new_db_type,new_db,tmp_name));
  }
  else if (mysql_rename_table(new_db_type,new_db,tmp_name,new_db,
3916 3917 3918 3919 3920
			      new_alias) ||
           (new_name != table_name || new_db != db) && // we also do rename
           Table_triggers_list::change_table_name(thd, db, table_name,
                                                  new_db, new_alias))
       
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3921 3922
  {						// Try to get everything back
    error=1;
3923
    VOID(quick_rm_table(new_db_type,new_db,new_alias));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3924
    VOID(quick_rm_table(new_db_type,new_db,tmp_name));
3925
    VOID(mysql_rename_table(old_db_type,db,old_name,db,alias));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3926 3927 3928
  }
  if (error)
  {
3929 3930 3931 3932
    /*
      This shouldn't happen.  We solve this the safe way by
      closing the locked table.
    */
3933 3934
    if (table)
      close_cached_table(thd,table);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3935 3936 3937
    VOID(pthread_mutex_unlock(&LOCK_open));
    goto err;
  }
3938
  if (thd->lock || new_name != table_name || no_table_reopen)  // True if WIN32
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3939
  {
3940 3941 3942 3943
    /*
      Not table locking or alter table with rename
      free locks and remove old table
    */
3944 3945
    if (table)
      close_cached_table(thd,table);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3946 3947 3948 3949
    VOID(quick_rm_table(old_db_type,db,old_name));
  }
  else
  {
3950 3951 3952 3953 3954
    /*
      Using LOCK TABLES without rename.
      This code is never executed on WIN32!
      Remove old renamed table, reopen table and get new locks
    */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3955 3956 3957
    if (table)
    {
      VOID(table->file->extra(HA_EXTRA_FORCE_REOPEN)); // Use new file
monty@mysql.com's avatar
monty@mysql.com committed
3958
      /* Mark in-use copies old */
3959
      remove_table_from_cache(thd,db,table_name,RTFC_NO_FLAG);
monty@mysql.com's avatar
monty@mysql.com committed
3960 3961
      /* end threads waiting on lock */
      mysql_lock_abort(thd,table);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3962 3963 3964 3965 3966
    }
    VOID(quick_rm_table(old_db_type,db,old_name));
    if (close_data_tables(thd,db,table_name) ||
	reopen_tables(thd,1,0))
    {						// This shouldn't happen
3967 3968
      if (table)
	close_cached_table(thd,table);		// Remove lock for table
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3969 3970 3971 3972 3973
      VOID(pthread_mutex_unlock(&LOCK_open));
      goto err;
    }
  }
  thd->proc_info="end";
3974
  if (mysql_bin_log.is_open())
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3975
  {
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3976
    thd->clear_error();
3977
    Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3978 3979
    mysql_bin_log.write(&qinfo);
  }
3980
  broadcast_refresh();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3981
  VOID(pthread_mutex_unlock(&LOCK_open));
3982 3983 3984
#ifdef HAVE_BERKELEY_DB
  if (old_db_type == DB_TYPE_BERKELEY_DB)
  {
3985 3986 3987 3988 3989
    /*
      For the alter table to be properly flushed to the logs, we
      have to open the new table.  If not, we get a problem on server
      shutdown.
    */
3990
    char path[FN_REFLEN];
3991
    build_table_path(path, sizeof(path), new_db, table_name, "");
3992 3993
    table=open_temporary_table(thd, path, new_db, tmp_name,0);
    if (table)
3994
    {
3995 3996
      intern_close_table(table);
      my_free((char*) table, MYF(0));
3997
    }
3998
    else
serg@serg.mylan's avatar
serg@serg.mylan committed
3999 4000
      sql_print_warning("Could not open BDB table %s.%s after rename\n",
                        new_db,table_name);
4001
    (void) berkeley_flush_logs();
4002 4003
  }
#endif
4004
  table_list->table=0;				// For query cache
4005
  query_cache_invalidate3(thd, table_list, 0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4006 4007

end_temporary:
4008 4009 4010
  my_snprintf(tmp_name, sizeof(tmp_name), ER(ER_INSERT_INFO),
	      (ulong) (copied + deleted), (ulong) deleted,
	      (ulong) thd->cuted_fields);
4011
  send_ok(thd, copied + deleted, 0L, tmp_name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4012
  thd->some_tables_deleted=0;
4013
  DBUG_RETURN(FALSE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4014

4015
err:
4016 4017 4018 4019 4020 4021 4022 4023
  /*
    No default value was provided for a DATE/DATETIME field, the
    current sql_mode doesn't allow the '0000-00-00' value and
    the table to be altered isn't empty.
    Report error here.
  */
  if (error_if_not_empty && thd->row_count)
  {
4024 4025
    const char *f_val= 0;
    enum enum_mysql_timestamp_type t_type= MYSQL_TIMESTAMP_DATE;
4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042
    switch (new_datetime_field->sql_type)
    {
      case MYSQL_TYPE_DATE:
      case MYSQL_TYPE_NEWDATE:
        f_val= "0000-00-00";
        t_type= MYSQL_TIMESTAMP_DATE;
        break;
      case MYSQL_TYPE_DATETIME:
        f_val= "0000-00-00 00:00:00";
        t_type= MYSQL_TIMESTAMP_DATETIME;
        break;
      default:
        /* Shouldn't get here. */
        DBUG_ASSERT(0);
    }
    bool save_abort_on_warning= thd->abort_on_warning;
    thd->abort_on_warning= TRUE;
igor@olga.mysql.com's avatar
igor@olga.mysql.com committed
4043 4044
    make_truncated_value_warning(thd, MYSQL_ERROR::WARN_LEVEL_ERROR,
                                 f_val, strlength(f_val), t_type,
4045 4046 4047
                                 new_datetime_field->field_name);
    thd->abort_on_warning= save_abort_on_warning;
  }
4048
  DBUG_RETURN(TRUE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4049 4050 4051 4052
}


static int
4053
copy_data_between_tables(TABLE *from,TABLE *to,
4054
			 List<create_field> &create,
4055
                         bool ignore,
4056
			 uint order_num, ORDER *order,
4057
			 ha_rows *copied,
andrey@example.com's avatar
andrey@example.com committed
4058
			 ha_rows *deleted,
4059 4060
                         enum enum_enable_or_disable keys_onoff,
                         bool error_if_not_empty)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4061 4062 4063 4064 4065
{
  int error;
  Copy_field *copy,*copy_end;
  ulong found_count,delete_count;
  THD *thd= current_thd;
4066
  uint length= 0;
4067 4068 4069 4070 4071
  SORT_FIELD *sortorder;
  READ_RECORD info;
  TABLE_LIST   tables;
  List<Item>   fields;
  List<Item>   all_fields;
4072
  ha_rows examined_rows;
4073
  bool auto_increment_field_copied= 0;
4074
  ulong save_sql_mode;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4075 4076
  DBUG_ENTER("copy_data_between_tables");

4077 4078 4079 4080 4081 4082
  /*
    Turn off recovery logging since rollback of an alter table is to
    delete the new table so there is no need to log the changes to it.
    
    This needs to be done before external_lock
  */
4083
  error= ha_enable_transaction(thd, FALSE);
4084 4085
  if (error)
    DBUG_RETURN(-1);
4086
  
4087
  if (!(copy= new Copy_field[to->s->fields]))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4088 4089
    DBUG_RETURN(-1);				/* purecov: inspected */

4090
  if (to->file->ha_external_lock(thd, F_WRLCK))
4091
    DBUG_RETURN(-1);
4092

andrey@example.com's avatar
andrey@example.com committed
4093 4094 4095
  /* We need external lock before we can disable/enable keys */
  alter_table_manage_keys(to, from->file->indexes_are_disabled(), keys_onoff);

4096 4097 4098 4099 4100
  /* We can abort alter table for any table type */
  thd->abort_on_warning= !ignore && test(thd->variables.sql_mode &
                                         (MODE_STRICT_TRANS_TABLES |
                                          MODE_STRICT_ALL_TABLES));

4101
  from->file->info(HA_STATUS_VARIABLE);
4102
  to->file->start_bulk_insert(from->file->records);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4103

4104 4105
  save_sql_mode= thd->variables.sql_mode;

bk@work.mysql.com's avatar
bk@work.mysql.com committed
4106 4107 4108 4109 4110 4111 4112
  List_iterator<create_field> it(create);
  create_field *def;
  copy_end=copy;
  for (Field **ptr=to->field ; *ptr ; ptr++)
  {
    def=it++;
    if (def->field)
4113 4114
    {
      if (*ptr == to->next_number_field)
4115
      {
4116
        auto_increment_field_copied= TRUE;
4117 4118 4119 4120 4121 4122 4123 4124 4125
        /*
          If we are going to copy contents of one auto_increment column to
          another auto_increment column it is sensible to preserve zeroes.
          This condition also covers case when we are don't actually alter
          auto_increment column.
        */
        if (def->field == from->found_next_number_field)
          thd->variables.sql_mode|= MODE_NO_AUTO_VALUE_ON_ZERO;
      }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4126
      (copy_end++)->set(*ptr,def->field,0);
4127 4128
    }

bk@work.mysql.com's avatar
bk@work.mysql.com committed
4129 4130
  }

4131 4132
  found_count=delete_count=0;

monty@donna.mysql.fi's avatar
monty@donna.mysql.fi committed
4133 4134
  if (order)
  {
igor@hundin.mysql.fi's avatar
igor@hundin.mysql.fi committed
4135
    from->sort.io_cache=(IO_CACHE*) my_malloc(sizeof(IO_CACHE),
4136
					      MYF(MY_FAE | MY_ZEROFILL));
4137
    bzero((char*) &tables,sizeof(tables));
4138 4139 4140
    tables.table= from;
    tables.alias= tables.table_name= (char*) from->s->table_name;
    tables.db=    (char*) from->s->db;
4141 4142
    error=1;

pem@mysql.telia.com's avatar
pem@mysql.telia.com committed
4143
    if (thd->lex->select_lex.setup_ref_array(thd, order_num) ||
4144
	setup_order(thd, thd->lex->select_lex.ref_pointer_array,
4145
		    &tables, fields, all_fields, order) ||
4146
	!(sortorder=make_unireg_sortorder(order, &length, NULL)) ||
4147 4148
	(from->sort.found_records = filesort(thd, from, sortorder, length,
					     (SQL_SELECT *) 0, HA_POS_ERROR,
monty@mysql.com's avatar
monty@mysql.com committed
4149 4150
					     &examined_rows)) ==
	HA_POS_ERROR)
4151 4152 4153
      goto err;
  };

4154 4155 4156 4157 4158
  /*
    Handler must be told explicitly to retrieve all columns, because
    this function does not set field->query_id in the columns to the
    current query id
  */
4159
  from->file->extra(HA_EXTRA_RETRIEVE_ALL_COLS);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4160
  init_read_record(&info, thd, from, (SQL_SELECT *) 0, 1,1);
4161
  if (ignore)
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
4162
    to->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
4163
  thd->row_count= 0;
4164
  restore_record(to, s->default_values);        // Create empty record
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4165 4166 4167 4168
  while (!(error=info.read_record(&info)))
  {
    if (thd->killed)
    {
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4169
      thd->send_kill_message();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4170 4171 4172
      error= 1;
      break;
    }
4173
    thd->row_count++;
4174 4175 4176 4177 4178 4179
    /* Return error if source table isn't empty. */
    if (error_if_not_empty)
    {
      error= 1;
      break;
    }
4180 4181
    if (to->next_number_field)
    {
4182
      if (auto_increment_field_copied)
4183
        to->auto_increment_field_not_null= TRUE;
4184 4185 4186
      else
        to->next_number_field->reset();
    }
4187
    
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4188
    for (Copy_field *copy_ptr=copy ; copy_ptr != copy_end ; copy_ptr++)
4189
    {
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4190
      copy_ptr->do_copy(copy_ptr);
4191
    }
4192 4193 4194
    error=to->file->write_row((byte*) to->record[0]);
    to->auto_increment_field_not_null= FALSE;
    if (error)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4195
    {
4196
      if (!ignore ||
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4197 4198 4199 4200 4201 4202
	  (error != HA_ERR_FOUND_DUPP_KEY &&
	   error != HA_ERR_FOUND_DUPP_UNIQUE))
      {
	to->file->print_error(error,MYF(0));
	break;
      }
4203
      to->file->restore_auto_increment();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4204 4205 4206
      delete_count++;
    }
    else
4207
      found_count++;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4208 4209
  }
  end_read_record(&info);
4210
  free_io_cache(from);
4211
  delete [] copy;				// This is never 0
serg@serg.mylan's avatar
serg@serg.mylan committed
4212

4213
  if (to->file->end_bulk_insert() && error <= 0)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4214
  {
serg@serg.mylan's avatar
serg@serg.mylan committed
4215
    to->file->print_error(my_errno,MYF(0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4216 4217
    error=1;
  }
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
4218
  to->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
4219

4220 4221 4222 4223 4224 4225
  if (ha_enable_transaction(thd, TRUE))
  {
    error= 1;
    goto err;
  }
  
4226 4227 4228 4229 4230 4231 4232 4233
  /*
    Ensure that the new table is saved properly to disk so that we
    can do a rename
  */
  if (ha_commit_stmt(thd))
    error=1;
  if (ha_commit(thd))
    error=1;
4234

4235
 err:
4236
  thd->variables.sql_mode= save_sql_mode;
4237
  thd->abort_on_warning= 0;
4238
  free_io_cache(from);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4239 4240
  *copied= found_count;
  *deleted=delete_count;
4241
  if (to->file->ha_external_lock(thd,F_UNLCK))
4242
    error=1;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4243 4244
  DBUG_RETURN(error > 0 ? -1 : 0);
}
4245

monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4246

4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257
/*
  Recreates tables by calling mysql_alter_table().

  SYNOPSIS
    mysql_recreate_table()
    thd			Thread handler
    tables		Tables to recreate

 RETURN
    Like mysql_alter_table().
*/
4258
bool mysql_recreate_table(THD *thd, TABLE_LIST *table_list)
4259 4260
{
  HA_CREATE_INFO create_info;
4261 4262 4263 4264
  Alter_info alter_info;

  DBUG_ENTER("mysql_recreate_table");

4265
  bzero((char*) &create_info, sizeof(create_info));
4266
  create_info.db_type=DB_TYPE_DEFAULT;
serg@sergbook.mysql.com's avatar
serg@sergbook.mysql.com committed
4267
  create_info.row_type=ROW_TYPE_NOT_USED;
4268
  create_info.default_table_charset=default_charset_info;
monty@mysql.com's avatar
monty@mysql.com committed
4269
  /* Force alter table to recreate table */
4270
  alter_info.flags= ALTER_CHANGE_COLUMN;
4271
  DBUG_RETURN(mysql_alter_table(thd, NullS, NullS, &create_info,
4272
                                table_list, &alter_info,
4273
                                0, (ORDER *) 0, 0));
4274 4275 4276
}


4277
bool mysql_checksum_table(THD *thd, TABLE_LIST *tables, HA_CHECK_OPT *check_opt)
4278 4279 4280 4281 4282
{
  TABLE_LIST *table;
  List<Item> field_list;
  Item *item;
  Protocol *protocol= thd->protocol;
4283
  DBUG_ENTER("mysql_checksum_table");
4284 4285 4286

  field_list.push_back(item = new Item_empty_string("Table", NAME_LEN*2));
  item->maybe_null= 1;
4287 4288
  field_list.push_back(item= new Item_int("Checksum", (longlong) 1,
                                          MY_INT64_NUM_DECIMAL_DIGITS));
4289
  item->maybe_null= 1;
4290 4291
  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
4292
    DBUG_RETURN(TRUE);
4293

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4294
  for (table= tables; table; table= table->next_local)
4295 4296
  {
    char table_name[NAME_LEN*2+2];
4297
    TABLE *t;
4298

4299
    strxmov(table_name, table->db ,".", table->table_name, NullS);
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4300

4301
    t= table->table= open_ltable(thd, table, TL_READ);
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4302
    thd->clear_error();			// these errors shouldn't get client
4303 4304 4305 4306

    protocol->prepare_for_resend();
    protocol->store(table_name, system_charset_info);

4307
    if (!t)
4308
    {
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4309
      /* Table didn't exist */
4310
      protocol->store_null();
4311
      thd->clear_error();
4312 4313 4314
    }
    else
    {
4315
      if (t->file->table_flags() & HA_HAS_CHECKSUM &&
4316 4317
	  !(check_opt->flags & T_EXTEND))
	protocol->store((ulonglong)t->file->checksum());
4318
      else if (!(t->file->table_flags() & HA_HAS_CHECKSUM) &&
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4319
	       (check_opt->flags & T_QUICK))
4320
	protocol->store_null();
4321 4322
      else
      {
4323 4324
	/* calculating table's checksum */
	ha_checksum crc= 0;
4325
        uchar null_mask=256 -  (1 << t->s->last_null_bit_pos);
4326 4327 4328 4329 4330 4331

	/* InnoDB must be told explicitly to retrieve all columns, because
	this function does not set field->query_id in the columns to the
	current query id */
	t->file->extra(HA_EXTRA_RETRIEVE_ALL_COLS);

4332
	if (t->file->ha_rnd_init(1))
4333 4334 4335
	  protocol->store_null();
	else
	{
4336
	  for (;;)
4337 4338
	  {
	    ha_checksum row_crc= 0;
4339 4340 4341 4342 4343 4344 4345
            int error= t->file->rnd_next(t->record[0]);
            if (unlikely(error))
            {
              if (error == HA_ERR_RECORD_DELETED)
                continue;
              break;
            }
4346 4347 4348 4349
	    if (t->s->null_bytes)
            {
              /* fix undefined null bits */
              t->record[0][t->s->null_bytes-1] |= null_mask;
serg@mysql.com's avatar
serg@mysql.com committed
4350 4351 4352
              if (!(t->s->db_create_options & HA_OPTION_PACK_RECORD))
                t->record[0][0] |= 1;

4353 4354
	      row_crc= my_checksum(row_crc, t->record[0], t->s->null_bytes);
            }
4355

4356
	    for (uint i= 0; i < t->s->fields; i++ )
4357 4358
	    {
	      Field *f= t->field[i];
4359 4360
	      if ((f->type() == FIELD_TYPE_BLOB) ||
                  (f->type() == MYSQL_TYPE_VARCHAR))
4361 4362 4363 4364 4365 4366 4367
	      {
		String tmp;
		f->val_str(&tmp);
		row_crc= my_checksum(row_crc, (byte*) tmp.ptr(), tmp.length());
	      }
	      else
		row_crc= my_checksum(row_crc, (byte*) f->ptr,
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				     f->pack_length());
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	    }
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	    crc+= row_crc;
	  }
	  protocol->store((ulonglong)crc);
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          t->file->ha_rnd_end();
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	}
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      }
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      thd->clear_error();
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      close_thread_tables(thd);
      table->table=0;				// For query cache
    }
    if (protocol->write())
      goto err;
  }

  send_eof(thd);
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  DBUG_RETURN(FALSE);
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monty@mashka.mysql.fi committed
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 err:
  close_thread_tables(thd);			// Shouldn't be needed
  if (table)
    table->table=0;
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  DBUG_RETURN(TRUE);
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}
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static bool check_engine(THD *thd, const char *table_name,
                         enum db_type *new_engine)
{
  enum db_type req_engine= *new_engine;
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  bool no_substitution=
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        test(thd->variables.sql_mode & MODE_NO_ENGINE_SUBSTITUTION);
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  if ((*new_engine=
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       ha_checktype(thd, req_engine, no_substitution, 1)) == DB_TYPE_UNKNOWN)
    return TRUE;

  if (req_engine != *new_engine)
  {
    push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                       ER_WARN_USING_OTHER_HANDLER,
                       ER(ER_WARN_USING_OTHER_HANDLER),
                       ha_get_storage_engine(*new_engine),
                       table_name);
  }
  return FALSE;
}
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static void set_tmp_file_path(char *buf, size_t bufsize, THD *thd)
{
  char *p= strnmov(buf, mysql_tmpdir, bufsize);
  my_snprintf(p, bufsize - (p - buf), "%s%lx_%lx_%x%s",
              tmp_file_prefix, current_pid,
              thd->thread_id, thd->tmp_table++, reg_ext);
  if (lower_case_table_names)
  {
    /* Convert all except tmpdir to lower case */
    my_casedn_str(files_charset_info, p);
  }
}