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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      {
        thd->no_warnings_for_error= 0;
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	DBUG_RETURN(-1);
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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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  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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    {
933
      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->create_length_to_internal_length();
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	  sql_field->decimals=		dup_field->decimals;
	  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)
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      (*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++))
  {
990
    DBUG_ASSERT(sql_field->charset != 0);
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    if (prepare_create_field(sql_field, &blob_columns, 
			     &timestamps, &timestamps_with_niladic,
994
			     file->table_flags()))
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      DBUG_RETURN(-1);
996
    if (sql_field->sql_type == MYSQL_TYPE_VARCHAR)
997
      create_info->varchar= 1;
998
    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 &&
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      (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];
1039

1040
  /* Calculate number of key segements */
1041
  *key_count= 0;
1042

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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)
      {
1052 1053 1054
        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));
1055 1056 1057 1058
	DBUG_RETURN(-1);
      }
      continue;
    }
1059
    (*key_count)++;
1060
    tmp=file->max_key_parts();
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1061 1062 1063 1064 1065
    if (key->columns.elements > tmp)
    {
      my_error(ER_TOO_MANY_KEY_PARTS,MYF(0),tmp);
      DBUG_RETURN(-1);
    }
1066
    if (key->name && strlen(key->name) > NAME_LEN)
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1067
    {
1068
      my_error(ER_TOO_LONG_IDENT, MYF(0), key->name);
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1069 1070
      DBUG_RETURN(-1);
    }
1071
    key_iterator2.rewind ();
1072
    if (key->type != Key::FOREIGN_KEY)
1073
    {
1074
      while ((key2 = key_iterator2++) != key)
1075
      {
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1076
	/*
1077 1078 1079
          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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1080
        */
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        if ((key2->type != Key::FOREIGN_KEY &&
             key2->name != ignore_key &&
             !foreign_key_prefix(key, key2)))
1084
        {
1085
          /* TODO: issue warning message */
1086 1087 1088 1089 1090 1091 1092
          /* mark that the generated key should be ignored */
          if (!key2->generated ||
              (key->generated && key->columns.elements <
               key2->columns.elements))
            key->name= ignore_key;
          else
          {
1093 1094 1095
            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);
    }
1111
  }
1112
  tmp=file->max_keys();
1113
  if (*key_count > tmp)
1114 1115 1116 1117
  {
    my_error(ER_TOO_MANY_KEYS,MYF(0),tmp);
    DBUG_RETURN(-1);
  }
1118

1119
  (*key_info_buffer) = key_info= (KEY*) sql_calloc(sizeof(KEY)* *key_count);
1120
  key_part_info=(KEY_PART_INFO*) sql_calloc(sizeof(KEY_PART_INFO)*key_parts);
1121
  if (!*key_info_buffer || ! key_part_info)
1122 1123
    DBUG_RETURN(-1);				// Out of memory

1124
  key_iterator.rewind();
1125
  key_number=0;
1126
  for (; (key=key_iterator++) ; key_number++)
1127 1128 1129 1130
  {
    uint key_length=0;
    key_part_spec *column;

1131 1132 1133 1134 1135 1136 1137 1138 1139 1140
    if (key->name == ignore_key)
    {
      /* ignore redundant keys */
      do
	key=key_iterator++;
      while (key && key->name == ignore_key);
      if (!key)
	break;
    }

1141
    switch(key->type){
1142
    case Key::MULTIPLE:
1143
	key_info->flags= 0;
1144
	break;
1145
    case Key::FULLTEXT:
1146
	key_info->flags= HA_FULLTEXT;
1147
	break;
1148
    case Key::SPATIAL:
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1149
#ifdef HAVE_SPATIAL
1150
	key_info->flags= HA_SPATIAL;
1151
	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;
1163
    }
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    if (key->generated)
      key_info->flags|= HA_GENERATED_KEY;
1166

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    key_info->key_parts=(uint8) key->columns.elements;
    key_info->key_part=key_part_info;
1169
    key_info->usable_key_parts= key_number;
1170
    key_info->algorithm=key->algorithm;
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    if (key->type == Key::FULLTEXT)
    {
1174
      if (!(file->table_flags() & HA_CAN_FULLTEXT))
1175
      {
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1176 1177
	my_message(ER_TABLE_CANT_HANDLE_FT, ER(ER_TABLE_CANT_HANDLE_FT),
                   MYF(0));
1178
	DBUG_RETURN(-1);
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      }
    }
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    /*
       Make SPATIAL to be RTREE by default
       SPATIAL only on BLOB or at least BINARY, this
1184
       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:
    */
1188

1189
    /* TODO: Add proper checks if handler supports key_type and algorithm */
1190
    if (key_info->flags & HA_SPATIAL)
1191
    {
1192 1193 1194 1195 1196 1197
      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);
      }
1198 1199
      if (key_info->key_parts != 1)
      {
1200
	my_error(ER_WRONG_ARGUMENTS, MYF(0), "SPATIAL INDEX");
1201
	DBUG_RETURN(-1);
1202
      }
1203
    }
1204
    else if (key_info->algorithm == HA_KEY_ALG_RTREE)
1205
    {
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#ifdef HAVE_RTREE_KEYS
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      if ((key_info->key_parts & 1) == 1)
      {
1209
	my_error(ER_WRONG_ARGUMENTS, MYF(0), "RTREE INDEX");
1210
	DBUG_RETURN(-1);
1211
      }
1212
      /* TODO: To be deleted */
1213
      my_error(ER_NOT_SUPPORTED_YET, MYF(0), "RTREE INDEX");
1214
      DBUG_RETURN(-1);
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1215
#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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1218 1219
      DBUG_RETURN(-1);
#endif
1220
    }
1221

1222
    List_iterator<key_part_spec> cols(key->columns), cols2(key->columns);
1223
    CHARSET_INFO *ft_key_charset=0;  // for FULLTEXT
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    for (uint column_nr=0 ; (column=cols++) ; column_nr++)
    {
1226
      uint length;
1227 1228
      key_part_spec *dup_column;

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      it.rewind();
      field=0;
      while ((sql_field=it++) &&
1232
	     my_strcasecmp(system_charset_info,
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			   column->field_name,
			   sql_field->field_name))
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	field++;
      if (!sql_field)
      {
1238
	my_error(ER_KEY_COLUMN_DOES_NOT_EXITS, MYF(0), column->field_name);
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	DBUG_RETURN(-1);
      }
1241
      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();
1253
      if (key->type == Key::FULLTEXT)
1254
      {
1255 1256
	if ((sql_field->sql_type != MYSQL_TYPE_STRING &&
	     sql_field->sql_type != MYSQL_TYPE_VARCHAR &&
1257 1258
	     !f_is_blob(sql_field->pack_flag)) ||
	    sql_field->charset == &my_charset_bin ||
1259
	    sql_field->charset->mbminlen > 1 || // ucs2 doesn't work yet
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	    (ft_key_charset && sql_field->charset != ft_key_charset))
	{
1262
	    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));
1274
      }
1275
      else
1276
      {
1277 1278
	column->length*= sql_field->charset->mbmaxlen;

1279 1280
	if (f_is_blob(sql_field->pack_flag) ||
            (f_is_geom(sql_field->pack_flag) && key->type != Key::SPATIAL))
1281
	{
1282
	  if (!(file->table_flags() & HA_CAN_INDEX_BLOBS))
1283
	  {
1284
	    my_error(ER_BLOB_USED_AS_KEY, MYF(0), column->field_name);
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	    DBUG_RETURN(-1);
	  }
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          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)
	  {
1292
	    my_error(ER_BLOB_KEY_WITHOUT_LENGTH, MYF(0), column->field_name);
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	    DBUG_RETURN(-1);
	  }
	}
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1296
#ifdef HAVE_SPATIAL
1297
	if (key->type == Key::SPATIAL)
1298
	{
1299
	  if (!column->length)
1300 1301
	  {
	    /*
1302 1303
              4 is: (Xmin,Xmax,Ymin,Ymax), this is for 2D case
              Lately we'll extend this code to support more dimensions
1304
	    */
1305
	    column->length= 4*sizeof(double);
1306 1307
	  }
	}
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1308
#endif
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	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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1316
            null_fields--;
1317 1318 1319
	  }
	  else
	     key_info->flags|= HA_NULL_PART_KEY;
1320
	  if (!(file->table_flags() & HA_NULL_IN_KEY))
1321
	  {
1322
	    my_error(ER_NULL_COLUMN_IN_INDEX, MYF(0), column->field_name);
1323 1324 1325 1326
	    DBUG_RETURN(-1);
	  }
	  if (key->type == Key::SPATIAL)
	  {
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1327 1328
	    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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1337
      }
1338

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1339 1340 1341
      key_part_info->fieldnr= field;
      key_part_info->offset=  (uint16) sql_field->offset;
      key_part_info->key_type=sql_field->pack_flag;
1342 1343
      length= sql_field->key_length;

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      if (column->length)
      {
	if (f_is_blob(sql_field->pack_flag))
	{
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1348
	  if ((length=column->length) > max_key_length ||
1349
	      length > file->max_key_part_length())
1350
	  {
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1351
	    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);
1360 1361
              /* 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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1369
	}
1370
	else if (!f_is_geom(sql_field->pack_flag) &&
1371
		  (column->length > length ||
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                   !Field::type_can_have_key_part (sql_field->sql_type) ||
1373 1374 1375 1376 1377
		   ((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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1378
	  my_message(ER_WRONG_SUB_KEY, ER(ER_WRONG_SUB_KEY), MYF(0));
1379 1380 1381 1382
	  DBUG_RETURN(-1);
	}
	else if (!(file->table_flags() & HA_NO_PREFIX_CHAR_KEYS))
	  length=column->length;
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1383 1384 1385
      }
      else if (length == 0)
      {
1386
	my_error(ER_WRONG_KEY_COLUMN, MYF(0), column->field_name);
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1387 1388
	  DBUG_RETURN(-1);
      }
1389
      if (length > file->max_key_part_length() && key->type != Key::FULLTEXT)
1390
      {
1391
        length= file->max_key_part_length();
1392 1393 1394 1395 1396 1397 1398 1399
	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);
1400 1401
          /* Align key length to multibyte char boundary */
          length-= length % sql_field->charset->mbmaxlen;
1402 1403 1404 1405 1406 1407
	}
	else
	{
	  my_error(ER_TOO_LONG_KEY,MYF(0),length);
	  DBUG_RETURN(-1);
	}
1408 1409
      }
      key_part_info->length=(uint16) length;
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1410
      /* Use packed keys for long strings on the first column */
1411
      if (!((*db_options) & HA_OPTION_NO_PACK_KEYS) &&
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1412
	  (length >= KEY_DEFAULT_PACK_LENGTH &&
1413 1414
	   (sql_field->sql_type == MYSQL_TYPE_STRING ||
	    sql_field->sql_type == MYSQL_TYPE_VARCHAR ||
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1415 1416
	    sql_field->pack_flag & FIELDFLAG_BLOB)))
      {
1417 1418 1419
	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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1420 1421 1422 1423 1424 1425 1426 1427 1428 1429
	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)
1430 1431 1432
	{
	  if (primary_key)
	  {
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1433 1434
	    my_message(ER_MULTIPLE_PRI_KEY, ER(ER_MULTIPLE_PRI_KEY),
                       MYF(0));
1435 1436 1437 1438 1439
	    DBUG_RETURN(-1);
	  }
	  key_name=primary_key_name;
	  primary_key=1;
	}
1440
	else if (!(key_name = key->name))
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1441
	  key_name=make_unique_key_name(sql_field->field_name,
1442 1443
					*key_info_buffer, key_info);
	if (check_if_keyname_exists(key_name, *key_info_buffer, key_info))
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1444
	{
1445
	  my_error(ER_DUP_KEYNAME, MYF(0), key_name);
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1446 1447 1448 1449 1450
	  DBUG_RETURN(-1);
	}
	key_info->name=(char*) key_name;
      }
    }
1451 1452
    if (!key_info->name || check_column_name(key_info->name))
    {
1453
      my_error(ER_WRONG_NAME_FOR_INDEX, MYF(0), key_info->name);
1454 1455
      DBUG_RETURN(-1);
    }
1456 1457
    if (!(key_info->flags & HA_NULL_PART_KEY))
      unique_key=1;
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1458
    key_info->key_length=(uint16) key_length;
1459
    if (key_length > max_key_length && key->type != Key::FULLTEXT)
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1460
    {
1461
      my_error(ER_TOO_LONG_KEY,MYF(0),max_key_length);
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1462 1463
      DBUG_RETURN(-1);
    }
1464
    key_info++;
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1465
  }
1466
  if (!unique_key && !primary_key &&
1467
      (file->table_flags() & HA_REQUIRE_PRIMARY_KEY))
1468
  {
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1469
    my_message(ER_REQUIRES_PRIMARY_KEY, ER(ER_REQUIRES_PRIMARY_KEY), MYF(0));
1470 1471
    DBUG_RETURN(-1);
  }
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1472 1473
  if (auto_increment > 0)
  {
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1474
    my_message(ER_WRONG_AUTO_KEY, ER(ER_WRONG_AUTO_KEY), MYF(0));
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1475 1476
    DBUG_RETURN(-1);
  }
1477
  /* Sort keys in optimized order */
1478
  qsort((gptr) *key_info_buffer, *key_count, sizeof(KEY),
1479
	(qsort_cmp) sort_keys);
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1480
  create_info->null_bits= null_fields;
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1482 1483 1484
  DBUG_RETURN(0);
}

1485

1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508
/*
  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];

1509 1510
    if (sql_field->def || (thd->variables.sql_mode & (MODE_STRICT_TRANS_TABLES |
                                                      MODE_STRICT_ALL_TABLES)))
1511 1512 1513 1514 1515 1516 1517 1518
    {
      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,
1519
            (sql_field->charset == &my_charset_bin) ? "VARBINARY" : "VARCHAR",
1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538
            (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();
1583 1584 1585 1586
  DBUG_ASSERT(sql_field->def == 0);
  /* Can't go wrong as sql_field->def is not defined */
  (void) prepare_blob_field(thd, sql_field);
}
1587 1588


1589 1590 1591 1592 1593
/*
  Create a table

  SYNOPSIS
    mysql_create_table()
1594 1595 1596 1597 1598
    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
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    internal_tmp_table   Set to 1 if this is an internal temporary table
1600
                         (From ALTER TABLE)
1601 1602

  DESCRIPTION
1603
    If one creates a temporary table, this is automatically opened
1604 1605 1606 1607 1608 1609

    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.

1610 1611 1612 1613 1614
    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.

1615
  RETURN VALUES
1616 1617
    FALSE OK
    TRUE  error
1618 1619
*/

1620 1621
bool mysql_create_table(THD *thd,const char *db, const char *table_name,
                        HA_CREATE_INFO *create_info,
1622
                        Alter_info *alter_info,
1623
                        bool internal_tmp_table,
1624
                        uint select_field_count)
1625
{
1626 1627 1628 1629 1630
  char		path[FN_REFLEN];
  const char	*alias;
  uint		db_options, key_count;
  KEY		*key_info_buffer;
  handler	*file;
1631
  bool		error= TRUE;
1632 1633 1634
  DBUG_ENTER("mysql_create_table");

  /* Check for duplicate fields and check type of table to create */
1635
  if (!alter_info->create_list.elements)
1636
  {
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1637 1638
    my_message(ER_TABLE_MUST_HAVE_COLUMNS, ER(ER_TABLE_MUST_HAVE_COLUMNS),
               MYF(0));
1639
    DBUG_RETURN(TRUE);
1640
  }
1641 1642
  if (check_engine(thd, table_name, &create_info->db_type))
    DBUG_RETURN(TRUE);
1643
  db_options= create_info->table_options;
1644 1645 1646
  if (create_info->row_type == ROW_TYPE_DYNAMIC)
    db_options|=HA_OPTION_PACK_RECORD;
  alias= table_case_name(create_info, table_name);
1647
  file= get_new_handler((TABLE*) 0, thd->mem_root, create_info->db_type);
1648

1649 1650 1651 1652 1653 1654 1655 1656
#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
  */
1657 1658 1659
  if ((create_info->options & HA_LEX_CREATE_TMP_TABLE) &&
      (file->table_flags() & HA_NO_TEMP_TABLES))
  {
1660
    my_error(ER_ILLEGAL_HA, MYF(0), table_name);
1661
    DBUG_RETURN(TRUE);
1662
  }
1663
#endif
1664

1665 1666 1667 1668 1669 1670 1671 1672
  /*
    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;
1673 1674 1675

    load_db_opt_by_name(thd, db, &db_info);

1676 1677 1678
    create_info->default_table_charset= db_info.default_table_charset;
  }

1679 1680 1681
  if (mysql_prepare_table(thd, create_info, alter_info, internal_tmp_table,
                          &db_options, file,
                          &key_info_buffer, &key_count,
1682
                          select_field_count))
1683
    DBUG_RETURN(TRUE);
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1684 1685 1686 1687

      /* Check if table exists */
  if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
  {
1688
    set_tmp_file_path(path, sizeof(path), thd);
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1689 1690
    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
1706
    build_table_path(path, sizeof(path), db, alias, reg_ext);
1707
  }
1708

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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))
  {
1713
    if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
1714 1715
    {
      create_info->table_existed= 1;		// Mark that table existed
1716 1717 1718
      push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
                          ER_TABLE_EXISTS_ERROR, ER(ER_TABLE_EXISTS_ERROR),
                          alias);
1719
      DBUG_RETURN(FALSE);
1720
    }
1721
    DBUG_PRINT("info",("1"));
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    my_error(ER_TABLE_EXISTS_ERROR, MYF(0), alias);
1723
    DBUG_RETURN(TRUE);
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1724 1725
  }
  VOID(pthread_mutex_lock(&LOCK_open));
1726
  if (!internal_tmp_table && !(create_info->options & HA_LEX_CREATE_TMP_TABLE))
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1727
  {
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    /*
      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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1736 1737
    {
      if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
1738
        goto warn;
1739
      DBUG_PRINT("info",("2"));
1740
      my_error(ER_TABLE_EXISTS_ERROR,MYF(0),table_name);
1741
      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)
1761
    {
1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776
      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";
1781
  create_info->table_existed= 0;		// Mark that table is created
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1783
  if (thd->variables.sql_mode & MODE_NO_DIR_IN_CREATE)
1784
    create_info->data_file_name= create_info->index_file_name= 0;
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  create_info->table_options=db_options;
1786

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1787
  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;
    }
1799
    thd->tmp_table_used= 1;
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1800
  }
1801
  if (!internal_tmp_table && mysql_bin_log.is_open())
1802
  {
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1803
    thd->clear_error();
1804
    Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
1805
    mysql_bin_log.write(&qinfo);
1806
  }
1807
  error= FALSE;
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1808

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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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1821 1822 1823 1824 1825 1826 1827 1828 1829 1830
}

/*
** 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++)
1831
    if (!my_strcasecmp(system_charset_info,name,key->name))
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      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;

1842 1843
  if (!check_if_keyname_exists(field_name,start,end) &&
      my_strcasecmp(system_charset_info,field_name,primary_key_name))
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1844
    return (char*) field_name;			// Use fieldname
1845 1846 1847 1848 1849 1850
  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
  */
1851
  for (uint i=2 ; i< 100; i++)
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1852
  {
1853 1854
    *buff_end= '_';
    int10_to_str(i, buff_end+1, 10);
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1855 1856 1857
    if (!check_if_keyname_exists(buff,start,end))
      return sql_strdup(buff);
  }
1858
  return (char*) "not_specified";		// Should never happen
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1859 1860
}

1861

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1862 1863 1864 1865
/****************************************************************************
** Alter a table definition
****************************************************************************/

1866
bool
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1867 1868
mysql_rename_table(enum db_type base,
		   const char *old_db,
1869
		   const char *old_name,
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1870
		   const char *new_db,
1871
		   const char *new_name)
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{
1873
  THD *thd= current_thd;
1874 1875 1876
  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));
1879
  int error=0;
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1880
  DBUG_ENTER("mysql_rename_table");
1881

1882 1883 1884 1885 1886 1887 1888 1889
  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.
   */
1890 1891
  if (lower_case_table_names == 2 && file &&
      !(file->table_flags() & HA_FILE_BASED))
1892
  {
1893 1894 1895 1896
    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;
1897

1898 1899 1900 1901
    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;
1902 1903
  }

1904
  if (!file || !(error=file->rename_table(from_base, to_base)))
1905 1906 1907
  {
    if (rename_file_ext(from,to,reg_ext))
    {
1908
      error=my_errno;
1909
      /* Restore old file name */
1910
      if (file)
1911
        file->rename_table(to_base, from_base);
1912 1913
    }
  }
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1914
  delete file;
1915 1916 1917
  if (error == HA_ERR_WRONG_COMMAND)
    my_error(ER_NOT_SUPPORTED_YET, MYF(0), "ALTER TABLE");
  else if (error)
1918 1919
    my_error(ER_ERROR_ON_RENAME, MYF(0), from, to, error);
  DBUG_RETURN(error != 0);
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1920 1921
}

1922

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1923
/*
1924 1925 1926 1927 1928 1929
  Force all other threads to stop using the table

  SYNOPSIS
    wait_while_table_is_used()
    thd			Thread handler
    table		Table to remove from cache
1930
    function		HA_EXTRA_PREPARE_FOR_DELETE if table is to be deleted
1931
			HA_EXTRA_FORCE_REOPEN if table is not be used
1932 1933 1934 1935 1936 1937 1938
  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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1939 1940
*/

1941 1942
static void wait_while_table_is_used(THD *thd,TABLE *table,
				     enum ha_extra_function function)
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1943
{
1944
  DBUG_PRINT("enter",("table: %s", table->s->table_name));
1945 1946
  DBUG_ENTER("wait_while_table_is_used");
  safe_mutex_assert_owner(&LOCK_open);
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1947

1948
  VOID(table->file->extra(function));
1949 1950 1951 1952
  /* 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 */
1953 1954
  remove_table_from_cache(thd, table->s->db,
                          table->s->table_name, RTFC_WAIT_OTHER_THREAD_FLAG);
1955 1956
  DBUG_VOID_RETURN;
}
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1957

1958 1959
/*
  Close a cached table
1960

1961
  SYNOPSIS
1962
    close_cached_table()
1963 1964 1965 1966 1967 1968
    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.
1969

1970 1971 1972 1973
  PREREQUISITES
    Lock on LOCK_open
    Win32 clients must also have a WRITE LOCK on the table !
*/
1974

1975
void close_cached_table(THD *thd, TABLE *table)
1976 1977
{
  DBUG_ENTER("close_cached_table");
1978

1979
  wait_while_table_is_used(thd, table, HA_EXTRA_PREPARE_FOR_DELETE);
1980 1981
  /* Close lock if this is not got with LOCK TABLES */
  if (thd->lock)
1982
  {
1983 1984
    mysql_unlock_tables(thd, thd->lock);
    thd->lock=0;			// Start locked threads
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1985
  }
1986 1987 1988 1989
  /* 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 */
1990
  broadcast_refresh();
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1991
  DBUG_VOID_RETURN;
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1992 1993
}

1994
static int send_check_errmsg(THD *thd, TABLE_LIST* table,
1995
			     const char* operator_name, const char* errmsg)
1996

1997
{
1998 1999
  Protocol *protocol= thd->protocol;
  protocol->prepare_for_resend();
2000 2001
  protocol->store(table->alias, system_charset_info);
  protocol->store((char*) operator_name, system_charset_info);
2002
  protocol->store(STRING_WITH_LEN("error"), system_charset_info);
2003
  protocol->store(errmsg, system_charset_info);
2004
  thd->clear_error();
2005
  if (protocol->write())
2006 2007 2008 2009
    return -1;
  return 1;
}

2010

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2011
static int prepare_for_restore(THD* thd, TABLE_LIST* table,
2012
			       HA_CHECK_OPT *check_opt)
2013
{
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2014
  DBUG_ENTER("prepare_for_restore");
2015

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2016 2017 2018 2019 2020 2021
  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"
				  ));
  }
2022
  else
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2023
  {
2024
    char* backup_dir= thd->lex->backup_dir;
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2025
    char src_path[FN_REFLEN], dst_path[FN_REFLEN];
2026 2027
    char* table_name= table->table_name;
    char* db= table->db;
2028

2029 2030
    if (fn_format_relative_to_data_home(src_path, table_name, backup_dir,
					reg_ext))
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2031
      DBUG_RETURN(-1); // protect buffer overflow
2032

2033
    my_snprintf(dst_path, sizeof(dst_path), "%s%s/%s",
2034
		mysql_real_data_home, db, table_name);
2035

2036
    if (lock_and_wait_for_table_name(thd,table))
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2037
      DBUG_RETURN(-1);
2038

2039
    if (my_copy(src_path,
2040 2041
		fn_format(dst_path, dst_path,"", reg_ext, 4),
		MYF(MY_WME)))
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2042
    {
2043
      pthread_mutex_lock(&LOCK_open);
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2044
      unlock_table_name(thd, table);
2045
      pthread_mutex_unlock(&LOCK_open);
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monty@donna.mysql.com committed
2046 2047 2048
      DBUG_RETURN(send_check_errmsg(thd, table, "restore",
				    "Failed copying .frm file"));
    }
2049
    if (mysql_truncate(thd, table, 1))
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2050
    {
2051
      pthread_mutex_lock(&LOCK_open);
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2052
      unlock_table_name(thd, table);
2053
      pthread_mutex_unlock(&LOCK_open);
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2054 2055
      DBUG_RETURN(send_check_errmsg(thd, table, "restore",
				    "Failed generating table from .frm file"));
2056
    }
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2057
  }
2058

2059 2060 2061 2062
  /*
    Now we should be able to open the partially restored table
    to finish the restore in the handler later on
  */
2063
  pthread_mutex_lock(&LOCK_open);
dlenev@mockturtle.local's avatar
dlenev@mockturtle.local committed
2064
  if (reopen_name_locked_table(thd, table, TRUE))
2065
  {
2066
    unlock_table_name(thd, table);
2067
    pthread_mutex_unlock(&LOCK_open);
2068 2069
    DBUG_RETURN(send_check_errmsg(thd, table, "restore",
                                  "Failed to open partially restored table"));
2070
  }
2071
  pthread_mutex_unlock(&LOCK_open);
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2072
  DBUG_RETURN(0);
2073
}
2074

2075

2076
static int prepare_for_repair(THD* thd, TABLE_LIST *table_list,
2077
			      HA_CHECK_OPT *check_opt)
serg@serg.mysql.com's avatar
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2078
{
2079 2080
  int error= 0;
  TABLE tmp_table, *table;
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2081 2082 2083 2084
  DBUG_ENTER("prepare_for_repair");

  if (!(check_opt->sql_flags & TT_USEFRM))
    DBUG_RETURN(0);
2085 2086

  if (!(table= table_list->table))		/* if open_ltable failed */
serg@serg.mysql.com's avatar
serg@serg.mysql.com committed
2087
  {
2088
    char name[FN_REFLEN];
2089
    build_table_path(name, sizeof(name), table_list->db,
2090
                     table_list->table_name, "");
2091
    if (openfrm(thd, name, "", 0, 0, 0, &tmp_table))
2092 2093
      DBUG_RETURN(0);				// Can't open frm file
    table= &tmp_table;
2094
  }
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2095

2096 2097 2098 2099 2100 2101 2102 2103 2104
  /*
    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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2105

2106 2107 2108
  char from[FN_REFLEN],tmp[FN_REFLEN+32];
  const char **ext= table->file->bas_ext();
  MY_STAT stat_info;
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2109

2110 2111
  /*
    Check if this is a table type that stores index and data separately,
2112 2113 2114
    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. 
2115 2116 2117
  */
  if (!ext[0] || !ext[1])
    goto end;					// No data file
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serg@serg.mysql.com committed
2118

2119
  strxmov(from, table->s->path, ext[1], NullS);	// Name of data file
2120 2121
  if (!my_stat(from, &stat_info, MYF(0)))
    goto end;				// Can't use USE_FRM flag
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2122

2123 2124
  my_snprintf(tmp, sizeof(tmp), "%s-%lx_%lx",
	      from, current_pid, thd->thread_id);
2125

2126 2127 2128 2129 2130 2131 2132
  /* 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);
  }
2133
  if (lock_and_wait_for_table_name(thd,table_list))
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serg@serg.mysql.com committed
2134
  {
2135 2136
    error= -1;
    goto end;
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serg@serg.mysql.com committed
2137
  }
2138
  if (my_rename(from, tmp, MYF(MY_WME)))
serg@serg.mysql.com's avatar
serg@serg.mysql.com committed
2139
  {
2140
    pthread_mutex_lock(&LOCK_open);
2141
    unlock_table_name(thd, table_list);
2142
    pthread_mutex_unlock(&LOCK_open);
2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163
    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
2164 2165
  }

2166 2167 2168 2169
  /*
    Now we should be able to open the partially repaired table
    to finish the repair in the handler later on.
  */
2170
  pthread_mutex_lock(&LOCK_open);
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dlenev@mockturtle.local committed
2171
  if (reopen_name_locked_table(thd, table_list, TRUE))
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2172
  {
2173
    unlock_table_name(thd, table_list);
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monty@hundin.mysql.fi committed
2174
    pthread_mutex_unlock(&LOCK_open);
2175 2176 2177
    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
2178
  }
2179
  pthread_mutex_unlock(&LOCK_open);
2180 2181 2182 2183 2184

end:
  if (table == &tmp_table)
    closefrm(table);				// Free allocated memory
  DBUG_RETURN(error);
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serg@serg.mysql.com committed
2185
}
2186

2187

2188

2189 2190
/*
  RETURN VALUES
bell@sanja.is.com.ua's avatar
merge  
bell@sanja.is.com.ua committed
2191 2192 2193
    FALSE Message sent to net (admin operation went ok)
    TRUE  Message should be sent by caller 
          (admin operation or network communication failed)
2194
*/
2195 2196 2197 2198 2199
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,
2200
                              bool no_warnings_for_error,
2201 2202 2203
                              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
2204 2205 2206
                              int (handler::*operator_func)(THD *,
                                                            HA_CHECK_OPT *),
                              int (view_operator_func)(THD *, TABLE_LIST*))
bk@work.mysql.com's avatar
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2207
{
2208
  TABLE_LIST *table;
2209
  SELECT_LEX *select= &thd->lex->select_lex;
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2210
  List<Item> field_list;
2211 2212
  Item *item;
  Protocol *protocol= thd->protocol;
2213
  LEX *lex= thd->lex;
2214
  int result_code;
2215
  DBUG_ENTER("mysql_admin_table");
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2216 2217 2218 2219 2220 2221 2222 2223 2224

  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;
2225 2226
  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
2227
    DBUG_RETURN(TRUE);
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bk@work.mysql.com committed
2228

2229
  mysql_ha_flush(thd, tables, MYSQL_HA_CLOSE_FINAL, FALSE);
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2230
  for (table= tables; table; table= table->next_local)
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bk@work.mysql.com committed
2231 2232
  {
    char table_name[NAME_LEN*2+2];
2233
    char* db = table->db;
2234
    bool fatal_error=0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2235

serg@serg.mylan's avatar
serg@serg.mylan committed
2236
    strxmov(table_name, db, ".", table->table_name, NullS);
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monty@donna.mysql.com committed
2237
    thd->open_options|= extra_open_options;
2238
    table->lock_type= lock_type;
2239

2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265
    /* 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;
    }
2266
    if (prepare_func)
2267
    {
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serg@serg.mysql.com committed
2268
      switch ((*prepare_func)(thd, table, check_opt)) {
2269 2270 2271 2272 2273 2274 2275
      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
        ;
2276
      }
2277
    }
2278

2279
    /*
bell@sanja.is.com.ua's avatar
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2280 2281 2282 2283 2284 2285
      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)
2286
    */
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bk@work.mysql.com committed
2287 2288
    if (!table->table)
    {
2289 2290 2291
      if (!thd->warn_list.elements)
        push_warning(thd, MYSQL_ERROR::WARN_LEVEL_ERROR,
                     ER_CHECK_NO_SUCH_TABLE, ER(ER_CHECK_NO_SUCH_TABLE));
2292 2293 2294
      /* if it was a view will check md5 sum */
      if (table->view &&
          view_checksum(thd, table) == HA_ADMIN_WRONG_CHECKSUM)
2295 2296 2297 2298
        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
2299
    }
2300 2301 2302 2303 2304 2305 2306

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

2307
    if ((table->table->db_stat & HA_READ_ONLY) && open_for_modify)
bk@work.mysql.com's avatar
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2308
    {
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
2309
      char buff[FN_REFLEN + MYSQL_ERRMSG_SIZE];
2310
      uint length;
2311
      protocol->prepare_for_resend();
2312 2313
      protocol->store(table_name, system_charset_info);
      protocol->store(operator_name, system_charset_info);
2314
      protocol->store(STRING_WITH_LEN("error"), system_charset_info);
2315 2316 2317
      length= my_snprintf(buff, sizeof(buff), ER(ER_OPEN_AS_READONLY),
                          table_name);
      protocol->store(buff, length, system_charset_info);
2318
      close_thread_tables(thd);
2319
      table->table=0;				// For query cache
2320
      if (protocol->write())
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2321 2322 2323 2324
	goto err;
      continue;
    }

2325
    /* Close all instances of the table to allow repair to rename files */
2326
    if (lock_type == TL_WRITE && table->table->s->version)
2327 2328
    {
      pthread_mutex_lock(&LOCK_open);
2329 2330
      const char *old_message=thd->enter_cond(&COND_refresh, &LOCK_open,
					      "Waiting to get writelock");
2331
      mysql_lock_abort(thd,table->table);
2332
      remove_table_from_cache(thd, table->table->s->db,
2333
                              table->table->s->table_name,
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2334 2335
                              RTFC_WAIT_OTHER_THREAD_FLAG |
                              RTFC_CHECK_KILLED_FLAG);
2336
      thd->exit_cond(old_message);
2337 2338
      if (thd->killed)
	goto err;
2339 2340 2341
      /* Flush entries in the query cache involving this table. */
      query_cache_invalidate3(thd, table->table, 0);
      open_for_modify= 0;
2342 2343
    }

2344
    if (table->table->s->crashed && operator_func == &handler::ha_check)
2345 2346 2347 2348
    {
      protocol->prepare_for_resend();
      protocol->store(table_name, system_charset_info);
      protocol->store(operator_name, system_charset_info);
2349 2350 2351
      protocol->store(STRING_WITH_LEN("warning"), system_charset_info);
      protocol->store(STRING_WITH_LEN("Table is marked as crashed"),
                      system_charset_info);
2352 2353 2354 2355
      if (protocol->write())
        goto err;
    }

2356 2357 2358 2359 2360 2361
    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))
      {
2362
        my_bool save_no_send_ok= thd->net.no_send_ok;
2363 2364
        close_thread_tables(thd);
        tmp_disable_binlog(thd); // binlogging is done by caller if wanted
2365 2366 2367
        thd->net.no_send_ok= TRUE;
        result_code= mysql_recreate_table(thd, table);
        thd->net.no_send_ok= save_no_send_ok;
2368 2369 2370 2371 2372 2373
        reenable_binlog(thd);
        goto send_result;
      }

    }

2374 2375 2376 2377
    result_code = (table->table->file->*operator_func)(thd, check_opt);

send_result:

2378
    lex->cleanup_after_one_table_open();
2379
    thd->clear_error();  // these errors shouldn't get client
2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395
    {
      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);
    }
2396
    protocol->prepare_for_resend();
2397 2398
    protocol->store(table_name, system_charset_info);
    protocol->store(operator_name, system_charset_info);
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2399

2400 2401 2402
send_result_message:

    DBUG_PRINT("info", ("result_code: %d", result_code));
2403 2404
    switch (result_code) {
    case HA_ADMIN_NOT_IMPLEMENTED:
2405
      {
2406 2407
	char buf[ERRMSGSIZE+20];
	uint length=my_snprintf(buf, ERRMSGSIZE,
2408
				ER(ER_CHECK_NOT_IMPLEMENTED), operator_name);
2409
	protocol->store(STRING_WITH_LEN("note"), system_charset_info);
2410
	protocol->store(buf, length, system_charset_info);
2411
      }
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2412 2413
      break;

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igor@rurik.mysql.com committed
2414 2415
    case HA_ADMIN_NOT_BASE_TABLE:
      {
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2416 2417
        char buf[ERRMSGSIZE+20];
        uint length= my_snprintf(buf, ERRMSGSIZE,
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2418
                                 ER(ER_BAD_TABLE_ERROR), table_name);
2419
        protocol->store(STRING_WITH_LEN("note"), system_charset_info);
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2420
        protocol->store(buf, length, system_charset_info);
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2421 2422 2423
      }
      break;

2424
    case HA_ADMIN_OK:
2425 2426
      protocol->store(STRING_WITH_LEN("status"), system_charset_info);
      protocol->store(STRING_WITH_LEN("OK"), system_charset_info);
bk@work.mysql.com's avatar
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2427 2428
      break;

2429
    case HA_ADMIN_FAILED:
2430 2431 2432
      protocol->store(STRING_WITH_LEN("status"), system_charset_info);
      protocol->store(STRING_WITH_LEN("Operation failed"),
                      system_charset_info);
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bk@work.mysql.com committed
2433 2434
      break;

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vva@eagle.mysql.r18.ru committed
2435
    case HA_ADMIN_REJECT:
2436 2437 2438
      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
2439
      open_for_modify= FALSE;
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vva@eagle.mysql.r18.ru committed
2440 2441
      break;

2442
    case HA_ADMIN_ALREADY_DONE:
2443 2444 2445
      protocol->store(STRING_WITH_LEN("status"), system_charset_info);
      protocol->store(STRING_WITH_LEN("Table is already up to date"),
                      system_charset_info);
2446 2447
      break;

2448
    case HA_ADMIN_CORRUPT:
2449 2450
      protocol->store(STRING_WITH_LEN("error"), system_charset_info);
      protocol->store(STRING_WITH_LEN("Corrupt"), system_charset_info);
2451
      fatal_error=1;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2452 2453
      break;

2454
    case HA_ADMIN_INVALID:
2455 2456 2457
      protocol->store(STRING_WITH_LEN("error"), system_charset_info);
      protocol->store(STRING_WITH_LEN("Invalid argument"),
                      system_charset_info);
2458 2459
      break;

2460 2461
    case HA_ADMIN_TRY_ALTER:
    {
2462
      my_bool save_no_send_ok= thd->net.no_send_ok;
2463 2464 2465 2466 2467 2468
      /*
        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
2469 2470 2471
      TABLE_LIST *save_next_local= table->next_local,
                 *save_next_global= table->next_global;
      table->next_local= table->next_global= 0;
2472
      tmp_disable_binlog(thd); // binlogging is done by caller if wanted
2473 2474 2475
      thd->net.no_send_ok= TRUE;
      result_code= mysql_recreate_table(thd, table);
      thd->net.no_send_ok= save_no_send_ok;
2476
      reenable_binlog(thd);
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bell@sanja.is.com.ua committed
2477
      close_thread_tables(thd);
2478 2479 2480 2481 2482 2483
      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
      }
2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495
      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. */
2496
            protocol->store(STRING_WITH_LEN("error"), system_charset_info);
2497 2498 2499 2500 2501 2502 2503 2504 2505
            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);
          }
        }
      }
2506
      result_code= result_code ? HA_ADMIN_FAILED : HA_ADMIN_OK;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2507 2508
      table->next_local= save_next_local;
      table->next_global= save_next_global;
2509 2510
      goto send_result_message;
    }
2511 2512
    case HA_ADMIN_WRONG_CHECKSUM:
    {
2513
      protocol->store(STRING_WITH_LEN("note"), system_charset_info);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2514 2515
      protocol->store(ER(ER_VIEW_CHECKSUM), strlen(ER(ER_VIEW_CHECKSUM)),
                      system_charset_info);
2516 2517
      break;
    }
2518

2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531
    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;
    }

2532
    default:				// Probably HA_ADMIN_INTERNAL_ERROR
2533 2534 2535 2536 2537
      {
        char buf[ERRMSGSIZE+20];
        uint length=my_snprintf(buf, ERRMSGSIZE,
                                "Unknown - internal error %d during operation",
                                result_code);
2538
        protocol->store(STRING_WITH_LEN("error"), system_charset_info);
2539 2540 2541 2542
        protocol->store(buf, length, system_charset_info);
        fatal_error=1;
        break;
      }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2543
    }
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2544
    if (table->table)
2545
    {
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2546 2547 2548 2549
      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
2550
        if (table->table->s->tmp_table)
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holyfoot@mysql.com committed
2551 2552 2553 2554 2555 2556 2557 2558 2559
          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
2560 2561
        query_cache_invalidate3(thd, table->table, 0);
      }
2562
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2563
    close_thread_tables(thd);
2564
    lex->reset_query_tables_list(FALSE);
2565
    table->table=0;				// For query cache
2566
    if (protocol->write())
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bk@work.mysql.com committed
2567 2568 2569
      goto err;
  }

2570
  send_eof(thd);
2571
  DBUG_RETURN(FALSE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2572
 err:
2573
  close_thread_tables(thd);			// Shouldn't be needed
2574 2575
  if (table)
    table->table=0;
2576
  DBUG_RETURN(TRUE);
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bk@work.mysql.com committed
2577 2578
}

2579

2580
bool mysql_backup_table(THD* thd, TABLE_LIST* table_list)
2581 2582 2583
{
  DBUG_ENTER("mysql_backup_table");
  DBUG_RETURN(mysql_admin_table(thd, table_list, 0,
2584
				"backup", TL_READ, 0, 0, 0, 0,
2585
				&handler::backup, 0));
2586
}
2587

2588

2589
bool mysql_restore_table(THD* thd, TABLE_LIST* table_list)
2590 2591 2592
{
  DBUG_ENTER("mysql_restore_table");
  DBUG_RETURN(mysql_admin_table(thd, table_list, 0,
2593
				"restore", TL_WRITE, 1, 1, 0,
2594
				&prepare_for_restore,
2595
				&handler::restore, 0));
2596
}
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2597

2598

2599
bool mysql_repair_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT* check_opt)
2600 2601 2602
{
  DBUG_ENTER("mysql_repair_table");
  DBUG_RETURN(mysql_admin_table(thd, tables, check_opt,
2603 2604 2605
				"repair", TL_WRITE, 1,
                                test(check_opt->sql_flags & TT_USEFRM),
                                HA_OPEN_FOR_REPAIR,
2606
				&prepare_for_repair,
2607
				&handler::ha_repair, 0));
2608 2609
}

2610

2611
bool mysql_optimize_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT* check_opt)
2612 2613 2614
{
  DBUG_ENTER("mysql_optimize_table");
  DBUG_RETURN(mysql_admin_table(thd, tables, check_opt,
2615
				"optimize", TL_WRITE, 1,0,0,0,
2616
				&handler::optimize, 0));
2617 2618 2619
}


igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2620 2621 2622 2623 2624
/*
  Assigned specified indexes for a table into key cache

  SYNOPSIS
    mysql_assign_to_keycache()
2625 2626
    thd		Thread object
    tables	Table list (one table only)
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2627 2628

  RETURN VALUES
2629 2630
   FALSE ok
   TRUE  error
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2631 2632
*/

2633
bool mysql_assign_to_keycache(THD* thd, TABLE_LIST* tables,
2634
			     LEX_STRING *key_cache_name)
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2635
{
2636
  HA_CHECK_OPT check_opt;
2637
  KEY_CACHE *key_cache;
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2638
  DBUG_ENTER("mysql_assign_to_keycache");
2639 2640 2641 2642 2643 2644 2645

  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);
2646
    DBUG_RETURN(TRUE);
2647 2648 2649 2650
  }
  pthread_mutex_unlock(&LOCK_global_system_variables);
  check_opt.key_cache= key_cache;
  DBUG_RETURN(mysql_admin_table(thd, tables, &check_opt,
2651
				"assign_to_keycache", TL_READ_NO_INSERT, 0, 0,
2652
				0, 0, &handler::assign_to_keycache, 0));
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2653 2654
}

igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2655 2656 2657 2658 2659 2660

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

  SYNOPSIS
    reassign_keycache_tables()
2661 2662 2663
    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
2664

2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677
  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
2678 2679 2680
    0	  ok
*/

2681 2682
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
2683 2684 2685
{
  DBUG_ENTER("reassign_keycache_tables");

2686 2687
  DBUG_ASSERT(src_cache != dst_cache);
  DBUG_ASSERT(src_cache->in_init);
2688
  src_cache->param_buff_size= 0;		// Free key cache
2689 2690
  ha_resize_key_cache(src_cache);
  ha_change_key_cache(src_cache, dst_cache);
2691
  DBUG_RETURN(0);
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2692 2693 2694
}


igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2695 2696 2697 2698 2699
/*
  Preload specified indexes for a table into key cache

  SYNOPSIS
    mysql_preload_keys()
2700 2701
    thd		Thread object
    tables	Table list (one table only)
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2702 2703

  RETURN VALUES
2704 2705
    FALSE ok
    TRUE  error
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2706 2707
*/

2708
bool mysql_preload_keys(THD* thd, TABLE_LIST* tables)
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2709 2710 2711
{
  DBUG_ENTER("mysql_preload_keys");
  DBUG_RETURN(mysql_admin_table(thd, tables, 0,
2712
				"preload_keys", TL_READ, 0, 0, 0, 0,
2713
				&handler::preload_keys, 0));
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2714 2715 2716
}


venu@myvenu.com's avatar
venu@myvenu.com committed
2717 2718 2719 2720 2721
/*
  Create a table identical to the specified table

  SYNOPSIS
    mysql_create_like_table()
2722
    thd		Thread object
2723 2724
    table       Table list element for target table
    src_table   Table list element for source table
venu@myvenu.com's avatar
venu@myvenu.com committed
2725 2726 2727 2728
    create_info Create info
    table_ident Src table_ident

  RETURN VALUES
2729 2730
    FALSE OK
    TRUE  error
venu@myvenu.com's avatar
venu@myvenu.com committed
2731 2732
*/

2733 2734
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
2735 2736 2737 2738
{
  TABLE **tmp_table;
  char src_path[FN_REFLEN], dst_path[FN_REFLEN];
  char *db= table->db;
2739
  char *table_name= table->table_name;
2740 2741
  int  err;
  bool res= TRUE;
2742
  db_type not_used;
venu@myvenu.com's avatar
venu@myvenu.com committed
2743 2744 2745
  DBUG_ENTER("mysql_create_like_table");

  /*
2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760
    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
2761
  */
2762
  if (lock_and_wait_for_table_name(thd, src_table))
2763
    goto err;
venu@myvenu.com's avatar
venu@myvenu.com committed
2764

2765 2766 2767 2768
  pthread_mutex_lock(&LOCK_open);

  if ((tmp_table= find_temporary_table(thd, src_table->db,
                                       src_table->table_name)))
2769
    strxmov(src_path, (*tmp_table)->s->path, reg_ext, NullS);
venu@myvenu.com's avatar
venu@myvenu.com committed
2770 2771
  else
  {
2772 2773
    strxmov(src_path, mysql_data_home, "/", src_table->db, "/",
            src_table->table_name, reg_ext, NullS);
2774 2775
    /* Resolve symlinks (for windows) */
    fn_format(src_path, src_path, "", "", MYF(MY_UNPACK_FILENAME));
venu@myvenu.com's avatar
venu@myvenu.com committed
2776 2777
    if (access(src_path, F_OK))
    {
2778
      my_error(ER_BAD_TABLE_ERROR, MYF(0), src_table->table_name);
2779
      goto err;
venu@myvenu.com's avatar
venu@myvenu.com committed
2780 2781 2782
    }
  }

2783 2784 2785
  /* 
     create like should be not allowed for Views, Triggers, ... 
  */
2786
  if (mysql_frm_type(thd, src_path, &not_used) != FRMTYPE_TABLE)
2787
  {
2788 2789
    my_error(ER_WRONG_OBJECT, MYF(0), src_table->db, src_table->table_name,
             "BASE TABLE");
2790 2791 2792
    goto err;
  }

2793 2794
  DBUG_EXECUTE_IF("sleep_create_like_before_check_if_exists", my_sleep(6000000););

venu@myvenu.com's avatar
venu@myvenu.com committed
2795 2796 2797
  /*
    Validate the destination table

2798
    skip the destination table name checking as this is already
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2799 2800 2801 2802 2803 2804
    validated.
  */
  if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
  {
    if (find_temporary_table(thd, db, table_name))
      goto table_exists;
2805
    set_tmp_file_path(dst_path, sizeof(dst_path), thd);
venu@myvenu.com's avatar
venu@myvenu.com committed
2806 2807 2808 2809
    create_info->table_options|= HA_CREATE_DELAY_KEY_WRITE;
  }
  else
  {
2810 2811 2812
    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
2813 2814

    /*
2815 2816
      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
2817 2818
      of open placeholders (see comment in mysql_create_table()).
    */
2819 2820
    if (table_cache_has_open_placeholder(thd, db, table_name) ||
        !access(dst_path, F_OK))
venu@myvenu.com's avatar
venu@myvenu.com committed
2821 2822 2823
      goto table_exists;
  }

2824 2825
  DBUG_EXECUTE_IF("sleep_create_like_before_copy", my_sleep(6000000););

2826
  /*
venu@myvenu.com's avatar
venu@myvenu.com committed
2827
    Create a new table by copying from source table
2828
  */
2829 2830 2831 2832 2833 2834
  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);
2835
    goto err;
2836
  }
venu@myvenu.com's avatar
venu@myvenu.com committed
2837

2838 2839
  DBUG_EXECUTE_IF("sleep_create_like_before_ha_create", my_sleep(6000000););

venu@myvenu.com's avatar
venu@myvenu.com committed
2840
  /*
2841 2842
    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
2843 2844
    and temporary tables).
  */
2845
  *fn_ext(dst_path)= 0;
gkodinov/kgeorge@magare.gmz's avatar
gkodinov/kgeorge@magare.gmz committed
2846 2847
  if (thd->variables.keep_files_on_create)
    create_info->options|= HA_CREATE_KEEP_FILES;
venu@myvenu.com's avatar
venu@myvenu.com committed
2848
  err= ha_create_table(dst_path, create_info, 1);
2849

venu@myvenu.com's avatar
venu@myvenu.com committed
2850 2851 2852 2853
  if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
  {
    if (err || !open_temporary_table(thd, dst_path, db, table_name, 1))
    {
2854 2855
      (void) rm_temporary_table(create_info->db_type,
				dst_path); /* purecov: inspected */
2856
      goto err;     /* purecov: inspected */
venu@myvenu.com's avatar
venu@myvenu.com committed
2857 2858 2859 2860
    }
  }
  else if (err)
  {
2861 2862 2863
    (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
2864
  }
2865

2866 2867
  DBUG_EXECUTE_IF("sleep_create_like_before_binlogging", my_sleep(6000000););

2868 2869
  // Must be written before unlock
  if (mysql_bin_log.is_open())
Sinisa@sinisa.nasamreza.org's avatar
Sinisa@sinisa.nasamreza.org committed
2870
  {
2871
    thd->clear_error();
2872
    Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
2873
    mysql_bin_log.write(&qinfo);
Sinisa@sinisa.nasamreza.org's avatar
Sinisa@sinisa.nasamreza.org committed
2874
  }
2875
  res= FALSE;
2876
  goto err;
2877

venu@myvenu.com's avatar
venu@myvenu.com committed
2878 2879 2880 2881
table_exists:
  if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
  {
    char warn_buff[MYSQL_ERRMSG_SIZE];
2882 2883
    my_snprintf(warn_buff, sizeof(warn_buff),
		ER(ER_TABLE_EXISTS_ERROR), table_name);
2884
    push_warning(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
2885
		 ER_TABLE_EXISTS_ERROR,warn_buff);
2886
    res= FALSE;
venu@myvenu.com's avatar
venu@myvenu.com committed
2887
  }
2888 2889 2890 2891
  else
    my_error(ER_TABLE_EXISTS_ERROR, MYF(0), table_name);

err:
2892
  unlock_table_name(thd, src_table);
2893 2894
  pthread_mutex_unlock(&LOCK_open);
  DBUG_RETURN(res);
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venu@myvenu.com committed
2895 2896 2897
}


2898
bool mysql_analyze_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT* check_opt)
2899
{
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2900 2901 2902 2903 2904 2905
#ifdef OS2
  thr_lock_type lock_type = TL_WRITE;
#else
  thr_lock_type lock_type = TL_READ_NO_INSERT;
#endif

2906 2907
  DBUG_ENTER("mysql_analyze_table");
  DBUG_RETURN(mysql_admin_table(thd, tables, check_opt,
2908
				"analyze", lock_type, 1, 0, 0, 0,
2909
				&handler::analyze, 0));
2910 2911 2912
}


2913
bool mysql_check_table(THD* thd, TABLE_LIST* tables,HA_CHECK_OPT* check_opt)
2914
{
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2915 2916 2917 2918 2919 2920
#ifdef OS2
  thr_lock_type lock_type = TL_WRITE;
#else
  thr_lock_type lock_type = TL_READ_NO_INSERT;
#endif

2921 2922
  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
2923
				"check", lock_type,
2924
				0, 0, HA_OPEN_FOR_REPAIR, 0,
2925
				&handler::ha_check, &view_checksum));
2926 2927
}

monty@mysql.com's avatar
monty@mysql.com committed
2928

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2929
/* table_list should contain just one table */
monty@mysql.com's avatar
monty@mysql.com committed
2930 2931 2932 2933
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
2934 2935 2936 2937 2938 2939
{
  TABLE *table;
  my_bool discard;
  int error;
  DBUG_ENTER("mysql_discard_or_import_tablespace");

monty@mysql.com's avatar
monty@mysql.com committed
2940 2941 2942 2943
  /*
    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
2944 2945 2946

  thd->proc_info="discard_or_import_tablespace";

monty@mysql.com's avatar
monty@mysql.com committed
2947
  discard= test(tablespace_op == DISCARD_TABLESPACE);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2948

monty@mysql.com's avatar
monty@mysql.com committed
2949 2950 2951 2952 2953
 /*
   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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2954 2955 2956 2957 2958
  if (!(table=open_ltable(thd,table_list,TL_WRITE)))
  {
    thd->tablespace_op=FALSE;
    DBUG_RETURN(-1);
  }
2959

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2960 2961 2962 2963 2964 2965 2966
  error=table->file->discard_or_import_tablespace(discard);

  thd->proc_info="end";

  if (error)
    goto err;

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2967 2968 2969 2970
  /*
    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())
  {
2981
    Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
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2982 2983 2984 2985
    mysql_bin_log.write(&qinfo);
  }
err:
  close_thread_tables(thd);
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2986
  thd->tablespace_op=FALSE;
2987
  
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2988 2989
  if (error == 0)
  {
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2990
    send_ok(thd);
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2991
    DBUG_RETURN(0);
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2992
  }
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2993

2994 2995
  table->file->print_error(error, MYF(0));
    
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2996
  DBUG_RETURN(-1);
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2997
}
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2998

2999

andrey@example.com's avatar
andrey@example.com committed
3000 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
/*
  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,
3039
                        ER_ILLEGAL_HA, ER(ER_ILLEGAL_HA), table->s->table_name);
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3040 3041 3042 3043 3044 3045 3046 3047
    error= 0;
  } else if (error)
    table->file->print_error(error, MYF(0));

  DBUG_RETURN(error);
}


3048 3049
/*
  Alter table
3050 3051 3052 3053 3054 3055 3056


  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.
3057
*/
3058

3059 3060 3061
bool mysql_alter_table(THD *thd,char *new_db, char *new_name,
                       HA_CREATE_INFO *create_info,
                       TABLE_LIST *table_list,
3062
                       Alter_info *alter_info,
3063
                       uint order_num, ORDER *order, bool ignore)
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3064
{
3065
  TABLE *table,*new_table=0;
3066
  int error= 0;
3067 3068
  char tmp_name[80],old_name[32],new_name_buff[FN_REFLEN];
  char new_alias_buff[FN_REFLEN], *table_name, *db, *new_alias, *alias;
3069
  char index_file[FN_REFLEN], data_file[FN_REFLEN];
3070 3071
  ha_rows copied,deleted;
  ulonglong next_insert_id;
3072
  uint db_create_options, used_fields;
3073
  enum db_type old_db_type, new_db_type, table_type;
3074
  bool need_copy_table;
3075
  bool no_table_reopen= FALSE, varchar= FALSE;
3076
  frm_type_enum frm_type;
3077 3078 3079 3080 3081 3082 3083 3084 3085 3086
  /*
    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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  DBUG_ENTER("mysql_alter_table");

  thd->proc_info="init";
3090
  table_name=table_list->table_name;
3091 3092
  alias= (lower_case_table_names == 2) ? table_list->alias : table_name;

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3093
  db=table_list->db;
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3094
  if (!new_db || !my_strcasecmp(table_alias_charset, new_db, db))
3095
    new_db= db;
3096
  used_fields=create_info->used_fields;
3097
  
3098
  mysql_ha_flush(thd, table_list, MYSQL_HA_CLOSE_FINAL, FALSE);
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3099

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3100
  /* DISCARD/IMPORT TABLESPACE is always alone in an ALTER TABLE */
3101
  if (alter_info->tablespace_op != NO_TABLESPACE_OP)
3102
    /* Conditionally writes to binlog. */
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3103
    DBUG_RETURN(mysql_discard_or_import_tablespace(thd,table_list,
3104
						   alter_info->tablespace_op));
3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126
  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))
3127 3128
    {
      error= 1;
3129
      goto view_err;
3130
    }
3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149
    
    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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3150
  if (!(table=open_ltable(thd,table_list,TL_WRITE_ALLOW_READ)))
3151
    DBUG_RETURN(TRUE);
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3152 3153 3154 3155 3156

  /* Check that we are not trying to rename to an existing table */
  if (new_name)
  {
    strmov(new_name_buff,new_name);
3157
    strmov(new_alias= new_alias_buff, new_name);
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3158
    if (lower_case_table_names)
3159 3160 3161
    {
      if (lower_case_table_names != 2)
      {
3162
	my_casedn_str(files_charset_info, new_name_buff);
3163 3164
	new_alias= new_name;			// Create lower case table name
      }
3165
      my_casedn_str(files_charset_info, new_name);
3166
    }
3167
    if (new_db == db &&
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3168
	!my_strcasecmp(table_alias_charset, new_name_buff, table_name))
3169 3170
    {
      /*
3171 3172
	Source and destination table names are equal: make later check
	easier.
3173
      */
3174
      new_alias= new_name= table_name;
3175
    }
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    else
    {
3178
      if (table->s->tmp_table)
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      {
	if (find_temporary_table(thd,new_db,new_name_buff))
	{
3182
	  my_error(ER_TABLE_EXISTS_ERROR, MYF(0), new_name_buff);
3183
	  DBUG_RETURN(TRUE);
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	}
      }
      else
      {
3188
	char dir_buff[FN_REFLEN];
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3189
        bool exists;
3190
	strxnmov(dir_buff, FN_REFLEN, mysql_real_data_home, new_db, NullS);
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        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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3197 3198
	{
	  /* Table will be closed in do_command() */
3199
	  my_error(ER_TABLE_EXISTS_ERROR, MYF(0), new_alias);
3200
	  DBUG_RETURN(TRUE);
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3201 3202 3203 3204 3205
	}
      }
    }
  }
  else
3206 3207 3208 3209
  {
    new_alias= (lower_case_table_names == 2) ? alias : table_name;
    new_name= table_name;
  }
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3210

3211
  old_db_type= table->s->db_type;
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3212
  if (create_info->db_type == DB_TYPE_DEFAULT)
3213
    create_info->db_type= old_db_type;
3214 3215 3216
  if (check_engine(thd, new_name, &create_info->db_type))
    DBUG_RETURN(TRUE);
  new_db_type= create_info->db_type;
3217
  if (create_info->row_type == ROW_TYPE_NOT_USED)
3218
    create_info->row_type= table->s->row_type;
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3219

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3220 3221
  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) ||
3222
      ha_check_storage_engine_flag(new_db_type, HTON_ALTER_NOT_SUPPORTED))
3223 3224 3225 3226 3227 3228
  {
    DBUG_PRINT("info", ("doesn't support alter"));
    my_error(ER_ILLEGAL_HA, MYF(0), table_name);
    DBUG_RETURN(TRUE);
  }
  
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3229
  thd->proc_info="setup";
3230
  if (!(alter_info->flags & ~(ALTER_RENAME | ALTER_KEYS_ONOFF)) &&
3231
      !table->s->tmp_table) // no need to touch frm
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3232
  {
3233 3234 3235 3236
    switch (alter_info->keys_onoff) {
    case LEAVE_AS_IS:
      break;
    case ENABLE:
3237 3238 3239 3240 3241 3242 3243 3244 3245 3246
      /*
        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));
3247
      wait_while_table_is_used(thd, table, HA_EXTRA_FORCE_REOPEN);
3248
      VOID(pthread_mutex_unlock(&LOCK_open));
3249 3250 3251 3252
      error= table->file->enable_indexes(HA_KEY_SWITCH_NONUNIQ_SAVE);
      /* COND_refresh will be signaled in close_thread_tables() */
      break;
    case DISABLE:
3253
      VOID(pthread_mutex_lock(&LOCK_open));
3254
      wait_while_table_is_used(thd, table, HA_EXTRA_FORCE_REOPEN);
3255
      VOID(pthread_mutex_unlock(&LOCK_open));
3256 3257 3258 3259 3260 3261
      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)
    {
3262
      error= 0;
3263 3264 3265 3266 3267
      push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
			  ER_ILLEGAL_HA, ER(ER_ILLEGAL_HA),
			  table->alias);
    }

3268 3269 3270 3271 3272 3273 3274 3275 3276 3277
    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.
    */

3278
    if (!error && (new_name != table_name || new_db != db))
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3279
    {
3280
      thd->proc_info="rename";
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dlenev@mockturtle.local committed
3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296
      /*
        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))
3297
      {
3298
	my_error(ER_TABLE_EXISTS_ERROR, MYF(0), new_name);
3299
	error= -1;
3300 3301 3302
      }
      else
      {
3303 3304
	*fn_ext(new_name)=0;
	if (mysql_rename_table(old_db_type,db,table_name,new_db,new_alias))
3305
	  error= -1;
3306 3307 3308 3309 3310 3311 3312
        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;
        }
3313
      }
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3314
    }
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heikki@hundin.mysql.fi committed
3315

3316
    if (error == HA_ERR_WRONG_COMMAND)
serg@serg.mylan's avatar
serg@serg.mylan committed
3317
    {
3318
      error= 0;
serg@serg.mylan's avatar
serg@serg.mylan committed
3319
      push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
3320
			  ER_ILLEGAL_HA, ER(ER_ILLEGAL_HA),
3321
			  table->alias);
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serg@serg.mylan committed
3322
    }
3323

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3324 3325
    if (!error)
    {
3326 3327
      if (mysql_bin_log.is_open())
      {
3328
	thd->clear_error();
3329
	Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
3330 3331
	mysql_bin_log.write(&qinfo);
      }
3332
      send_ok(thd);
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3333
    }
3334
    else if (error > 0)
3335 3336
    {
      table->file->print_error(error, MYF(0));
3337
      error= -1;
3338
    }
3339
    VOID(pthread_mutex_unlock(&LOCK_open));
3340
    table_list->table= NULL;                    // For query cache
3341
    query_cache_invalidate3(thd, table_list, 0);
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3342 3343 3344 3345
    DBUG_RETURN(error);
  }

  /* Full alter table */
3346

3347
  /* Let new create options override the old ones */
3348
  if (!(used_fields & HA_CREATE_USED_MIN_ROWS))
3349
    create_info->min_rows= table->s->min_rows;
3350
  if (!(used_fields & HA_CREATE_USED_MAX_ROWS))
3351
    create_info->max_rows= table->s->max_rows;
3352
  if (!(used_fields & HA_CREATE_USED_AVG_ROW_LENGTH))
3353
    create_info->avg_row_length= table->s->avg_row_length;
3354
  if (!(used_fields & HA_CREATE_USED_DEFAULT_CHARSET))
3355
    create_info->default_table_charset= table->s->table_charset;
3356 3357 3358 3359 3360 3361
  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;
  }
3362

3363
  restore_record(table, s->default_values);     // Empty record for DEFAULT
3364
  List_iterator<Alter_drop> drop_it(alter_info->drop_list);
3365
  List_iterator<create_field> def_it(alter_info->create_list);
3366
  List_iterator<Alter_column> alter_it(alter_info->alter_list);
3367
  Alter_info new_info;                   // Add new columns and indexes here
3368 3369
  create_field *def;

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3370
  /*
3371
    First collect all fields from table which isn't in drop_list
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3372 3373 3374 3375 3376
  */

  Field **f_ptr,*field;
  for (f_ptr=table->field ; (field= *f_ptr) ; f_ptr++)
  {
3377 3378
    if (field->type() == MYSQL_TYPE_STRING)
      varchar= TRUE;
3379
    /* Check if field should be dropped */
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3380 3381 3382 3383 3384
    Alter_drop *drop;
    drop_it.rewind();
    while ((drop=drop_it++))
    {
      if (drop->type == Alter_drop::COLUMN &&
3385
	  !my_strcasecmp(system_charset_info,field->field_name, drop->name))
3386 3387 3388
      {
	/* Reset auto_increment value if it was dropped */
	if (MTYP_TYPENR(field->unireg_check) == Field::NEXT_NUMBER &&
3389
	    !(used_fields & HA_CREATE_USED_AUTO))
3390 3391 3392 3393
	{
	  create_info->auto_increment_value=0;
	  create_info->used_fields|=HA_CREATE_USED_AUTO;
	}
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3394
	break;
3395
      }
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    }
    if (drop)
    {
      drop_it.remove();
      continue;
    }
    /* Check if field is changed */
    def_it.rewind();
    while ((def=def_it++))
    {
3406
      if (def->change &&
3407
	  !my_strcasecmp(system_charset_info,field->field_name, def->change))
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3408 3409 3410 3411 3412
	break;
    }
    if (def)
    {						// Field is changed
      def->field=field;
3413 3414
      if (!def->after)
      {
3415
	new_info.create_list.push_back(def);
3416 3417
	def_it.remove();
      }
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3418 3419 3420
    }
    else
    {						// Use old field value
3421
      new_info.create_list.push_back(def= new create_field(field, field));
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3422 3423 3424 3425
      alter_it.rewind();			// Change default if ALTER
      Alter_column *alter;
      while ((alter=alter_it++))
      {
3426
	if (!my_strcasecmp(system_charset_info,field->field_name, alter->name))
bk@work.mysql.com's avatar
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3427 3428 3429 3430
	  break;
      }
      if (alter)
      {
3431 3432
	if (def->sql_type == FIELD_TYPE_BLOB)
	{
3433
	  my_error(ER_BLOB_CANT_HAVE_DEFAULT, MYF(0), def->change);
3434
	  DBUG_RETURN(TRUE);
3435
	}
3436 3437 3438 3439
	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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3440 3441 3442 3443 3444
	alter_it.remove();
      }
    }
  }
  def_it.rewind();
3445
  List_iterator<create_field> find_it(new_info.create_list);
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3446 3447
  while ((def=def_it++))			// Add new columns
  {
3448
    if (def->change && ! def->field)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3449
    {
3450
      my_error(ER_BAD_FIELD_ERROR, MYF(0), def->change, table_name);
3451
      DBUG_RETURN(TRUE);
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bk@work.mysql.com committed
3452
    }
3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468
    /*
      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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3469
    if (!def->after)
3470
      new_info.create_list.push_back(def);
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bk@work.mysql.com committed
3471
    else if (def->after == first_keyword)
3472
      new_info.create_list.push_front(def);
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3473 3474 3475 3476 3477 3478
    else
    {
      create_field *find;
      find_it.rewind();
      while ((find=find_it++))			// Add new columns
      {
3479
	if (!my_strcasecmp(system_charset_info,def->after, find->field_name))
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bk@work.mysql.com committed
3480 3481 3482 3483
	  break;
      }
      if (!find)
      {
3484
	my_error(ER_BAD_FIELD_ERROR, MYF(0), def->after, table_name);
3485
	DBUG_RETURN(TRUE);
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bk@work.mysql.com committed
3486 3487 3488 3489
      }
      find_it.after(def);			// Put element after this
    }
  }
3490
  if (alter_info->alter_list.elements)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3491
  {
3492 3493
    my_error(ER_BAD_FIELD_ERROR, MYF(0),
             alter_info->alter_list.head()->name, table_name);
3494
    DBUG_RETURN(TRUE);
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bk@work.mysql.com committed
3495
  }
3496
  if (!new_info.create_list.elements)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3497
  {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3498 3499
    my_message(ER_CANT_REMOVE_ALL_FIELDS, ER(ER_CANT_REMOVE_ALL_FIELDS),
               MYF(0));
3500
    DBUG_RETURN(TRUE);
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bk@work.mysql.com committed
3501 3502 3503
  }

  /*
3504 3505
    Collect all keys which isn't in drop list. Add only those
    for which some fields exists.
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3506 3507
  */

3508 3509
  List_iterator<Key> key_it(alter_info->key_list);
  List_iterator<create_field> field_it(new_info.create_list);
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3510 3511 3512
  List<key_part_spec> key_parts;

  KEY *key_info=table->key_info;
3513
  for (uint i=0 ; i < table->s->keys ; i++,key_info++)
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bk@work.mysql.com committed
3514
  {
3515
    char *key_name= key_info->name;
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3516 3517 3518 3519 3520
    Alter_drop *drop;
    drop_it.rewind();
    while ((drop=drop_it++))
    {
      if (drop->type == Alter_drop::KEY &&
3521
	  !my_strcasecmp(system_charset_info,key_name, drop->name))
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3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542
	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)
	{
3543 3544
	  if (!my_strcasecmp(system_charset_info, key_part_name,
			     cfield->change))
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bk@work.mysql.com committed
3545 3546
	    break;
	}
3547
	else if (!my_strcasecmp(system_charset_info,
3548
				key_part_name, cfield->field_name))
3549
	  break;
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bk@work.mysql.com committed
3550 3551 3552 3553 3554
      }
      if (!cfield)
	continue;				// Field is removed
      uint key_part_length=key_part->length;
      if (cfield->field)			// Not new field
3555 3556 3557 3558 3559 3560 3561
      {
        /*
          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.

3562 3563 3564
          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.

3565 3566 3567 3568
          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()) ||
3569
            !Field::type_can_have_key_part(cfield->sql_type) ||
bar@mysql.com's avatar
bar@mysql.com committed
3570 3571
            (cfield->field->field_length == key_part_length &&
             !f_is_blob(key_part->key_type)) ||
3572 3573 3574
	    (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
3575
      }
3576
      key_part_length /= key_part->field->charset()->mbmaxlen;
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3577 3578 3579 3580
      key_parts.push_back(new key_part_spec(cfield->field_name,
					    key_part_length));
    }
    if (key_parts.elements)
3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604
    {
      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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3605 3606 3607 3608
  }
  {
    Key *key;
    while ((key=key_it++))			// Add new keys
3609 3610
    {
      if (key->type != Key::FOREIGN_KEY)
3611
        new_info.key_list.push_back(key);
3612 3613 3614 3615
      if (key->name &&
	  !my_strcasecmp(system_charset_info,key->name,primary_key_name))
      {
	my_error(ER_WRONG_NAME_FOR_INDEX, MYF(0), key->name);
3616
	DBUG_RETURN(TRUE);
3617
      }
3618
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3619 3620
  }

3621
  if (alter_info->drop_list.elements)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3622
  {
3623 3624
    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
3625 3626
    goto err;
  }
3627
  if (alter_info->alter_list.elements)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3628
  {
3629 3630
    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
3631 3632 3633
    goto err;
  }

3634
  db_create_options= table->s->db_create_options & ~(HA_OPTION_PACK_RECORD);
3635 3636
  my_snprintf(tmp_name, sizeof(tmp_name), "%s-%lx_%lx", tmp_file_prefix,
	      current_pid, thd->thread_id);
3637 3638
  /* Safety fix for innodb */
  if (lower_case_table_names)
3639
    my_casedn_str(files_charset_info, tmp_name);
3640 3641 3642 3643
  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
3644
  create_info->db_type=new_db_type;
3645 3646 3647 3648 3649
  if (!create_info->comment.str)
  {
    create_info->comment.str= table->s->comment.str;
    create_info->comment.length= table->s->comment.length;
  }
3650 3651 3652 3653 3654

  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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3655 3656 3657 3658 3659 3660 3661 3662 3663 3664
    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;

3665
  if (table->s->tmp_table)
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bk@work.mysql.com committed
3666 3667
    create_info->options|=HA_LEX_CREATE_TMP_TABLE;

3668 3669
  /*
    better have a negative test here, instead of positive, like
monty@mysql.com's avatar
monty@mysql.com committed
3670
    alter_info->flags & ALTER_ADD_COLUMN|ALTER_ADD_INDEX|...
3671
    so that ALTER TABLE won't break when somebody will add new flag
3672 3673 3674 3675 3676

    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.
3677 3678 3679 3680 3681 3682 3683 3684

    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.
3685
  */
monty@mysql.com's avatar
monty@mysql.com committed
3686 3687 3688 3689
  need_copy_table= (alter_info->flags &
                    ~(ALTER_CHANGE_COLUMN_DEFAULT|ALTER_OPTIONS) ||
                    (create_info->used_fields &
                     ~(HA_CREATE_USED_COMMENT|HA_CREATE_USED_PASSWORD)) ||
3690
                    table->s->tmp_table ||
3691
                    !table->s->mysql_version ||
3692
                    (table->s->frm_version < FRM_VER_TRUE_VARCHAR && varchar));
3693 3694
  create_info->frm_only= !need_copy_table;

3695 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
  /*
    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);
    }
  }
3739 3740
  else
    create_info->data_file_name=create_info->index_file_name=0;
monty@mysql.com's avatar
monty@mysql.com committed
3741 3742

  /* We don't log the statement, it will be logged later. */
3743
  {
monty@mysql.com's avatar
monty@mysql.com committed
3744 3745
    tmp_disable_binlog(thd);
    error= mysql_create_table(thd, new_db, tmp_name,
3746
                              create_info, &new_info, 1, 0);
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monty@mysql.com committed
3747 3748
    reenable_binlog(thd);
    if (error)
3749 3750
      DBUG_RETURN(error);
  }
3751
  if (need_copy_table)
3752
  {
3753
    if (table->s->tmp_table)
3754 3755 3756 3757
    {
      TABLE_LIST tbl;
      bzero((void*) &tbl, sizeof(tbl));
      tbl.db= new_db;
3758
      tbl.table_name= tbl.alias= tmp_name;
3759 3760
      new_table= open_table(thd, &tbl, thd->mem_root, (bool*) 0,
                            MYSQL_LOCK_IGNORE_FLUSH);
3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774
    }
    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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3775 3776
  }

3777
  /* We don't want update TIMESTAMP fields during ALTER TABLE. */
3778
  thd->count_cuted_fields= CHECK_FIELD_WARN;	// calc cuted fields
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3779 3780
  thd->cuted_fields=0L;
  thd->proc_info="copy to tmp table";
3781
  next_insert_id=thd->next_insert_id;		// Remember for logging
3782
  copied=deleted=0;
3783
  if (new_table && !new_table->s->is_view)
3784
  {
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monty@mysql.com committed
3785
    new_table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
3786
    new_table->next_number_field=new_table->found_next_number_field;
3787
    error= copy_data_between_tables(table, new_table, new_info.create_list,
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kostja@bodhi.local committed
3788
                                    ignore, order_num, order,
3789 3790
                                    &copied, &deleted, alter_info->keys_onoff,
                                    error_if_not_empty);
3791
  }
3792 3793 3794 3795
  else if (!new_table)
  {
    VOID(pthread_mutex_lock(&LOCK_open));
    wait_while_table_is_used(thd, table, HA_EXTRA_FORCE_REOPEN);
3796
    VOID(pthread_mutex_unlock(&LOCK_open));
3797 3798
    alter_table_manage_keys(table, table->file->indexes_are_disabled(),
                            alter_info->keys_onoff);
3799 3800 3801
    error= ha_commit_stmt(thd);
    if (ha_commit(thd))
      error= 1;
3802 3803
  }

3804
  thd->last_insert_id=next_insert_id;		// Needed for correct log
3805
  thd->count_cuted_fields= CHECK_FIELD_IGNORE;
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bk@work.mysql.com committed
3806

3807
  if (table->s->tmp_table)
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bk@work.mysql.com committed
3808 3809 3810 3811
  {
    /* We changed a temporary table */
    if (error)
    {
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3812 3813 3814
      /*
	The following function call will free the new_table pointer,
	in close_temporary_table(), so we can safely directly jump to err
3815
      */
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bk@work.mysql.com committed
3816 3817 3818
      close_temporary_table(thd,new_db,tmp_name);
      goto err;
    }
3819 3820 3821 3822 3823 3824
    /* 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
3825
    /* Remove link to old table and rename the new one */
3826
    close_temporary_table(thd, table->s->db, table_name);
3827 3828
    /* 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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3829 3830 3831 3832 3833
    {						// Fatal error
      close_temporary_table(thd,new_db,tmp_name);
      my_free((gptr) new_table,MYF(0));
      goto err;
    }
3834 3835 3836 3837
    /* 
     Writing to the binlog does not need to be synchronized for temporary tables, 
     which are thread-specific. 
    */
3838 3839
    if (mysql_bin_log.is_open())
    {
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3840
      thd->clear_error();
3841
      Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
3842 3843
      mysql_bin_log.write(&qinfo);
    }
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bk@work.mysql.com committed
3844 3845 3846
    goto end_temporary;
  }

3847 3848 3849 3850 3851
  if (new_table)
  {
    intern_close_table(new_table);              /* close temporary table */
    my_free((gptr) new_table,MYF(0));
  }
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3852 3853 3854 3855 3856 3857 3858
  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;
  }
3859

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3860
  /*
3861 3862
    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
3863
    from the cache, free all locks, close the old table and remove it.
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bk@work.mysql.com committed
3864 3865 3866
  */

  thd->proc_info="rename result table";
3867 3868
  my_snprintf(old_name, sizeof(old_name), "%s2-%lx-%lx", tmp_file_prefix,
	      current_pid, thd->thread_id);
3869 3870
  if (lower_case_table_names)
    my_casedn_str(files_charset_info, old_name);
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bk@work.mysql.com committed
3871

3872 3873 3874 3875 3876
#if (!defined( __WIN__) && !defined( __EMX__) && !defined( OS2))
  if (table->file->has_transactions())
#endif
  {
    /*
3877
      Win32 and InnoDB can't drop a table that is in use, so we must
3878
      close the original table at before doing the rename
3879
    */
3880
    close_cached_table(thd, table);
3881
    table=0;					// Marker that table is closed
3882
    no_table_reopen= TRUE;
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bk@work.mysql.com committed
3883
  }
3884 3885 3886
#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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3887 3888
#endif

dlenev@mockturtle.local's avatar
dlenev@mockturtle.local committed
3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904
  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;
    }
  }
3905

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3906
  error=0;
3907 3908
  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
3909 3910 3911 3912 3913 3914
  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,
3915 3916 3917 3918 3919
			      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
3920 3921
  {						// Try to get everything back
    error=1;
3922
    VOID(quick_rm_table(new_db_type,new_db,new_alias));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3923
    VOID(quick_rm_table(new_db_type,new_db,tmp_name));
3924
    VOID(mysql_rename_table(old_db_type,db,old_name,db,alias));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3925 3926 3927
  }
  if (error)
  {
3928 3929 3930 3931
    /*
      This shouldn't happen.  We solve this the safe way by
      closing the locked table.
    */
3932 3933
    if (table)
      close_cached_table(thd,table);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3934 3935 3936
    VOID(pthread_mutex_unlock(&LOCK_open));
    goto err;
  }
3937
  if (thd->lock || new_name != table_name || no_table_reopen)  // True if WIN32
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3938
  {
3939 3940 3941 3942
    /*
      Not table locking or alter table with rename
      free locks and remove old table
    */
3943 3944
    if (table)
      close_cached_table(thd,table);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3945 3946 3947 3948
    VOID(quick_rm_table(old_db_type,db,old_name));
  }
  else
  {
3949 3950 3951 3952 3953
    /*
      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
3954 3955 3956
    if (table)
    {
      VOID(table->file->extra(HA_EXTRA_FORCE_REOPEN)); // Use new file
monty@mysql.com's avatar
monty@mysql.com committed
3957
      /* Mark in-use copies old */
3958
      remove_table_from_cache(thd,db,table_name,RTFC_NO_FLAG);
monty@mysql.com's avatar
monty@mysql.com committed
3959 3960
      /* end threads waiting on lock */
      mysql_lock_abort(thd,table);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3961 3962 3963 3964 3965
    }
    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
3966 3967
      if (table)
	close_cached_table(thd,table);		// Remove lock for table
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3968 3969 3970 3971 3972
      VOID(pthread_mutex_unlock(&LOCK_open));
      goto err;
    }
  }
  thd->proc_info="end";
3973
  if (mysql_bin_log.is_open())
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3974
  {
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3975
    thd->clear_error();
3976
    Query_log_event qinfo(thd, thd->query, thd->query_length, FALSE, FALSE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3977 3978
    mysql_bin_log.write(&qinfo);
  }
3979
  broadcast_refresh();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3980
  VOID(pthread_mutex_unlock(&LOCK_open));
3981 3982 3983
#ifdef HAVE_BERKELEY_DB
  if (old_db_type == DB_TYPE_BERKELEY_DB)
  {
3984 3985 3986 3987 3988
    /*
      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.
    */
3989
    char path[FN_REFLEN];
3990
    build_table_path(path, sizeof(path), new_db, table_name, "");
3991 3992
    table=open_temporary_table(thd, path, new_db, tmp_name,0);
    if (table)
3993
    {
3994 3995
      intern_close_table(table);
      my_free((char*) table, MYF(0));
3996
    }
3997
    else
serg@serg.mylan's avatar
serg@serg.mylan committed
3998 3999
      sql_print_warning("Could not open BDB table %s.%s after rename\n",
                        new_db,table_name);
4000
    (void) berkeley_flush_logs();
4001 4002
  }
#endif
4003
  table_list->table=0;				// For query cache
4004
  query_cache_invalidate3(thd, table_list, 0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4005 4006

end_temporary:
4007 4008 4009
  my_snprintf(tmp_name, sizeof(tmp_name), ER(ER_INSERT_INFO),
	      (ulong) (copied + deleted), (ulong) deleted,
	      (ulong) thd->cuted_fields);
4010
  send_ok(thd, copied + deleted, 0L, tmp_name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4011
  thd->some_tables_deleted=0;
4012
  DBUG_RETURN(FALSE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4013

4014
err:
4015 4016 4017 4018 4019 4020 4021 4022
  /*
    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)
  {
4023 4024
    const char *f_val= 0;
    enum enum_mysql_timestamp_type t_type= MYSQL_TIMESTAMP_DATE;
4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041
    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
4042 4043
    make_truncated_value_warning(thd, MYSQL_ERROR::WARN_LEVEL_ERROR,
                                 f_val, strlength(f_val), t_type,
4044 4045 4046
                                 new_datetime_field->field_name);
    thd->abort_on_warning= save_abort_on_warning;
  }
4047
  DBUG_RETURN(TRUE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4048 4049 4050 4051
}


static int
4052
copy_data_between_tables(TABLE *from,TABLE *to,
4053
			 List<create_field> &create,
4054
                         bool ignore,
4055
			 uint order_num, ORDER *order,
4056
			 ha_rows *copied,
andrey@example.com's avatar
andrey@example.com committed
4057
			 ha_rows *deleted,
4058 4059
                         enum enum_enable_or_disable keys_onoff,
                         bool error_if_not_empty)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4060 4061 4062 4063 4064
{
  int error;
  Copy_field *copy,*copy_end;
  ulong found_count,delete_count;
  THD *thd= current_thd;
4065
  uint length= 0;
4066 4067 4068 4069 4070
  SORT_FIELD *sortorder;
  READ_RECORD info;
  TABLE_LIST   tables;
  List<Item>   fields;
  List<Item>   all_fields;
4071
  ha_rows examined_rows;
4072
  bool auto_increment_field_copied= 0;
4073
  ulong save_sql_mode;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4074 4075
  DBUG_ENTER("copy_data_between_tables");

4076 4077 4078 4079 4080 4081
  /*
    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
  */
4082
  error= ha_enable_transaction(thd, FALSE);
4083 4084
  if (error)
    DBUG_RETURN(-1);
4085
  
4086
  if (!(copy= new Copy_field[to->s->fields]))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4087 4088
    DBUG_RETURN(-1);				/* purecov: inspected */

4089 4090
  if (to->file->external_lock(thd, F_WRLCK))
    DBUG_RETURN(-1);
4091

andrey@example.com's avatar
andrey@example.com committed
4092 4093 4094
  /* We need external lock before we can disable/enable keys */
  alter_table_manage_keys(to, from->file->indexes_are_disabled(), keys_onoff);

4095
  /* We can abort alter table for any table type */
4096
  thd->no_trans_update.stmt= FALSE;
4097 4098 4099 4100
  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 4242
  if (to->file->external_lock(thd,F_UNLCK))
    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);
  }
}