sql_table.cc 66.5 KB
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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB

   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
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   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 <assert.h>
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#ifdef __WIN__
#include <io.h>
#endif

extern HASH open_cache;
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static 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,
				    List<create_field> &create,
				    enum enum_duplicates handle_duplicates,
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                                    ORDER *order,
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				    ha_rows *copied,ha_rows *deleted);
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/*****************************************************************************
** Remove all possbile tables and give a compact errormessage for all
** wrong tables.
** This will wait for all users to free the table before dropping it
*****************************************************************************/

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int mysql_rm_table(THD *thd,TABLE_LIST *tables, my_bool if_exists,
		   my_bool drop_temporary)
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{
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  int error;
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  DBUG_ENTER("mysql_rm_table");

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

  thd->mysys_var->current_mutex= &LOCK_open;
  thd->mysys_var->current_cond= &COND_refresh;
  VOID(pthread_mutex_lock(&LOCK_open));

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  if (!drop_temporary && global_read_lock)
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  {
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    if (thd->global_read_lock)
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    {
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      my_error(ER_TABLE_NOT_LOCKED_FOR_WRITE,MYF(0),
	       tables->real_name);
      error = 1;
      goto err;
    }
    while (global_read_lock && ! thd->killed)
    {
      (void) pthread_cond_wait(&COND_refresh,&LOCK_open);
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    }
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  }
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  error=mysql_rm_table_part2(thd,tables, if_exists, drop_temporary, 0);
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 err:
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  pthread_mutex_unlock(&LOCK_open);
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  VOID(pthread_cond_broadcast(&COND_refresh)); // Signal to refresh
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  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);

  if (error)
    DBUG_RETURN(-1);
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  send_ok(thd);
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  DBUG_RETURN(0);
}

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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,
			     dont_log_query);
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  pthread_mutex_unlock(&LOCK_open);
  VOID(pthread_cond_broadcast(&COND_refresh)); // Signal to refresh

  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
    dont_log_query	Don't log the query

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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 dont_log_query)
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{
  TABLE_LIST *table;
  char	path[FN_REFLEN];
  String wrong_tables;
  db_type table_type;
  int error;
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  bool some_tables_deleted=0, tmp_table_deleted=0;
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  DBUG_ENTER("mysql_rm_table_part2");

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  for (table=tables ; table ; table=table->next)
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  {
    char *db=table->db ? table->db : thd->db;
    if (!close_temporary_table(thd, db, table->real_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->real_name);
      while (remove_table_from_cache(thd,db,table->real_name) && !thd->killed)
      {
	dropping_tables++;
	(void) pthread_cond_wait(&COND_refresh,&LOCK_open);
	dropping_tables--;
      }
      drop_locked_tables(thd,db,table->real_name);
      if (thd->killed)
	DBUG_RETURN(-1);
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      /* remove form file and isam files */
      strxmov(path, mysql_data_home, "/", db, "/", table->real_name, reg_ext,
	      NullS);
      (void) unpack_filename(path,path);
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      table_type=get_table_type(path);
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    }
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    if (drop_temporary || access(path,F_OK))
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    {
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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),
			    table->real_name);
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      else
        error= 1;
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    }
    else
    {
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      char *end;
      *(end=fn_ext(path))=0;			// Remove extension
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      error=ha_delete_table(table_type, path);
      if (error == ENOENT && if_exists)
	error = 0;
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      if (!error || error == ENOENT)
      {
	/* Delete the table definition file */
	strmov(end,reg_ext);
	if (!(error=my_delete(path,MYF(MY_WME))))
	  some_tables_deleted=1;
      }
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    }
    if (error)
    {
      if (wrong_tables.length())
	wrong_tables.append(',');
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      wrong_tables.append(String(table->real_name,default_charset_info));
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    }
  }
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  thd->lex.tmp_table_used= tmp_table_deleted;
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  if (some_tables_deleted || tmp_table_deleted)
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  {
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    query_cache_invalidate3(thd, tables, 0);
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    if (!dont_log_query)
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    {
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      mysql_update_log.write(thd, thd->query,thd->query_length);
      if (mysql_bin_log.is_open())
      {
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	Query_log_event qinfo(thd, thd->query, thd->query_length,
			      tmp_table_deleted && !some_tables_deleted);
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	mysql_bin_log.write(&qinfo);
      }
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    }
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  }
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  error = 0;
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  if (wrong_tables.length())
  {
    my_error(ER_BAD_TABLE_ERROR,MYF(0),wrong_tables.c_ptr());
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    error=1;
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  }
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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;
  (void) sprintf(path,"%s/%s/%s%s",mysql_data_home,db,table_name,reg_ext);
  unpack_filename(path,path);
  if (my_delete(path,MYF(0)))
    error=1; /* purecov: inspected */
  sprintf(path,"%s/%s/%s",mysql_data_home,db,table_name);
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  unpack_filename(path,path);
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  return ha_delete_table(base,path) || error;
}

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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;
    if ((a->flags ^ b->flags) & HA_NULL_PART_KEY)
    {
      /* Sort NOT NULL keys before other keys */
      return (a->flags & HA_NULL_PART_KEY) ? 1 : -1;
    }
    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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  /*
    Prefer original key order.  usable_key_parts contains here
    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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/*
  Create a table

  SYNOPSIS
    mysql_create_table()
    thd			Thread object
    db			Database
    table_name		Table name
    create_info		Create information (like MAX_ROWS)
    fields		List of fields to create
    keys		List of keys to create
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    tmp_table		Set to 1 if this is an internal temporary table
			(From ALTER TABLE)    
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    no_log		Don't log the query to binary log.

  DESCRIPTION		       
    If one creates a temporary table, this is automaticly opened

    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.

  RETURN VALUES
    0	ok
    -1	error
*/
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int mysql_create_table(THD *thd,const char *db, const char *table_name,
		       HA_CREATE_INFO *create_info,
		       List<create_field> &fields,
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		       List<Key> &keys,bool tmp_table,bool no_log,
                       uint select_field_count)
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{
  char		path[FN_REFLEN];
  const char	*key_name;
  create_field	*sql_field,*dup_field;
  int		error= -1;
  uint		db_options,field,null_fields,blob_columns;
  ulong		pos;
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  KEY	        *key_info,*key_info_buffer;
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  KEY_PART_INFO *key_part_info;
  int		auto_increment=0;
  handler	*file;
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  int           field_no,dup_no;
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  DBUG_ENTER("mysql_create_table");

  /*
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    Check for duplicate fields and check type of table to create
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  */

  if (!fields.elements)
  {
    my_error(ER_TABLE_MUST_HAVE_COLUMNS,MYF(0));
    DBUG_RETURN(-1);
  }
  List_iterator<create_field> it(fields),it2(fields);
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  int select_field_pos=fields.elements - select_field_count;
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  null_fields=blob_columns=0;
  db_options=create_info->table_options;
  if (create_info->row_type == ROW_TYPE_DYNAMIC)
    db_options|=HA_OPTION_PACK_RECORD;
  file=get_new_handler((TABLE*) 0, create_info->db_type);

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  if ((create_info->options & HA_LEX_CREATE_TMP_TABLE) &&
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      (file->table_flags() & HA_NO_TEMP_TABLES))
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  {
    my_error(ER_ILLEGAL_HA,MYF(0),table_name);
    DBUG_RETURN(-1);
  }

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  for (field_no=0; (sql_field=it++) ; field_no++)
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  {
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    /* Don't pack keys in old tables if the user has requested this */
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    if ((sql_field->flags & BLOB_FLAG) ||
	sql_field->sql_type == FIELD_TYPE_VAR_STRING &&
	create_info->row_type != ROW_TYPE_FIXED)
    {
      db_options|=HA_OPTION_PACK_RECORD;
    }
    if (!(sql_field->flags & NOT_NULL_FLAG))
      null_fields++;
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    /* Check if we have used the same field name before */
    for (dup_no=0; (dup_field=it2++) != sql_field; dup_no++)
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    {
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      if (my_strcasecmp(system_charset_info,
                        sql_field->field_name,
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                        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
	*/
        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);
          DBUG_RETURN(-1);
        }
        else
        {
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	  /* Field redefined */
	  sql_field->length=		dup_field->length;
	  sql_field->decimals=		dup_field->decimals;
	  sql_field->flags=		dup_field->flags;
	  sql_field->pack_length=	dup_field->pack_length;
	  sql_field->unireg_check=	dup_field->unireg_check;
	  sql_field->sql_type=		dup_field->sql_type;
	  it2.remove();			// Remove first (create) definition
	  select_field_pos--;
	  break;
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        }
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      }
    }
    it2.rewind();
  }
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  /* If fixed row records, we need one bit to check for deleted rows */
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  if (!(db_options & HA_OPTION_PACK_RECORD))
    null_fields++;
  pos=(null_fields+7)/8;

  it.rewind();
  while ((sql_field=it++))
  {
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    if (!sql_field->charset)
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      sql_field->charset = create_info->table_charset ?
			   create_info->table_charset : 
			   thd->db_charset? thd->db_charset :
			   default_charset_info;
    
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    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);
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      if (sql_field->charset->state & MY_CS_BINSORT)
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	sql_field->pack_flag|=FIELDFLAG_BINARY;
      sql_field->length=8;			// Unireg field length
      sql_field->unireg_check=Field::BLOB_FIELD;
      blob_columns++;
      break;
    case FIELD_TYPE_VAR_STRING:
    case FIELD_TYPE_STRING:
      sql_field->pack_flag=0;
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      if (sql_field->charset->state & MY_CS_BINSORT)
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	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;
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      if (sql_field->charset->state & MY_CS_BINSORT)
	sql_field->pack_flag|=FIELDFLAG_BINARY;
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      sql_field->unireg_check=Field::INTERVAL_FIELD;
      break;
    case FIELD_TYPE_SET:
      sql_field->pack_flag=pack_length_to_packflag(sql_field->pack_length) |
	FIELDFLAG_BITFIELD;
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      if (sql_field->charset->state & MY_CS_BINSORT)
	sql_field->pack_flag|=FIELDFLAG_BINARY;
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      sql_field->unireg_check=Field::BIT_FIELD;
      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_TIMESTAMP:
      sql_field->unireg_check=Field::TIMESTAMP_FIELD;
      /* 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;
    sql_field->offset= pos;
    if (MTYP_TYPENR(sql_field->unireg_check) == Field::NEXT_NUMBER)
      auto_increment++;
    pos+=sql_field->pack_length;
  }
  if (auto_increment > 1)
  {
    my_error(ER_WRONG_AUTO_KEY,MYF(0));
    DBUG_RETURN(-1);
  }
  if (auto_increment &&
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      (file->table_flags() & HA_NO_AUTO_INCREMENT))
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  {
    my_error(ER_TABLE_CANT_HANDLE_AUTO_INCREMENT,MYF(0));
    DBUG_RETURN(-1);
  }

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

  /* Create keys */
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  List_iterator<Key> key_iterator(keys);
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  uint key_parts=0, key_count=0, fk_key_count=0;
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  List<Key> keys_in_order;			// Add new keys here
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  bool primary_key=0,unique_key=0;
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  Key *key;
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  uint tmp, key_number;
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  /* Calculate number of key segements */
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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)
      {
	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));
	DBUG_RETURN(-1);
      }
      continue;
    }
    key_count++;
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    tmp=max(file->max_key_parts(),MAX_REF_PARTS);
    if (key->columns.elements > tmp)
    {
      my_error(ER_TOO_MANY_KEY_PARTS,MYF(0),tmp);
      DBUG_RETURN(-1);
    }
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    if (key->name && strlen(key->name) > NAME_LEN)
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    {
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      my_error(ER_TOO_LONG_IDENT, MYF(0), key->name);
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      DBUG_RETURN(-1);
    }
    key_parts+=key->columns.elements;
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  }
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  tmp=min(file->max_keys(), MAX_KEY);
  if (key_count > tmp)
  {
    my_error(ER_TOO_MANY_KEYS,MYF(0),tmp);
    DBUG_RETURN(-1);
  }
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  key_info_buffer=key_info=(KEY*) sql_calloc(sizeof(KEY)*key_count);
  key_part_info=(KEY_PART_INFO*) sql_calloc(sizeof(KEY_PART_INFO)*key_parts);
  if (!key_info_buffer || ! key_part_info)
    DBUG_RETURN(-1);				// Out of memory

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

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    switch(key->type){
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    case Key::MULTIPLE:
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        key_info->flags = 0;
        break;
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    case Key::FULLTEXT:
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        key_info->flags = HA_FULLTEXT;
        break;
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    case Key::SPATIAL:
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        key_info->flags = HA_SPATIAL;
        break;
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    case Key::FOREIGN_KEY:
      key_number--;				// Skip this key
      continue;
    default:
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        key_info->flags = HA_NOSAME;
    }

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    key_info->key_parts=(uint8) key->columns.elements;
    key_info->key_part=key_part_info;
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    key_info->usable_key_parts= key_number;
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    key_info->algorithm=key->algorithm;
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    /* TODO: Add proper checks if handler supports key_type and algorithm */
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    if (key->type == Key::FULLTEXT)
    {
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      if (!(file->table_flags() & HA_CAN_FULLTEXT))
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      {
        my_error(ER_TABLE_CANT_HANDLE_FULLTEXT, MYF(0));
        DBUG_RETURN(-1);
      }
    }
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    /*
       Make SPATIAL to be RTREE by default
       SPATIAL only on BLOB or at least BINARY, this
       actually should be replaced by special GEOM type 
       in near future when new frm file is ready
       checking for proper key parts number:
    */
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    if (key_info->flags == HA_SPATIAL)
    {
      if (key_info->key_parts != 1)
      {
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        my_printf_error(ER_WRONG_ARGUMENTS,
                        ER(ER_WRONG_ARGUMENTS),MYF(0),"SPATIAL INDEX");
        DBUG_RETURN(-1);
      }
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    }
    else if (key_info->algorithm == HA_KEY_ALG_RTREE)
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    {
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      if ((key_info->key_parts & 1) == 1)
      {
	my_printf_error(ER_WRONG_ARGUMENTS,
			ER(ER_WRONG_ARGUMENTS),MYF(0),"RTREE INDEX");
	DBUG_RETURN(-1);
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      }
    }
    
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    List_iterator<key_part_spec> cols(key->columns);
    for (uint column_nr=0 ; (column=cols++) ; column_nr++)
    {
      it.rewind();
      field=0;
      while ((sql_field=it++) &&
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	     my_strcasecmp(system_charset_info,
                           column->field_name,
                           sql_field->field_name))
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	field++;
      if (!sql_field)
      {
	my_printf_error(ER_KEY_COLUMN_DOES_NOT_EXITS,
			ER(ER_KEY_COLUMN_DOES_NOT_EXITS),MYF(0),
			column->field_name);
	DBUG_RETURN(-1);
      }
      if (f_is_blob(sql_field->pack_flag))
      {
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	if (!(file->table_flags() & HA_BLOB_KEY))
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	{
	  my_printf_error(ER_BLOB_USED_AS_KEY,ER(ER_BLOB_USED_AS_KEY),MYF(0),
			  column->field_name);
	  DBUG_RETURN(-1);
	}
	if (!column->length)
	{
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          if (key->type == Key::FULLTEXT)
            column->length=1; /* ft-code ignores it anyway :-) */
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          else if (key->type == Key::SPATIAL)
          {
            /* 
               BAR: 4 is: (Xmin,Xmax,Ymin,Ymax), this is for 2D case
               Lately we'll extend this code to support more dimensions 
            */
            column->length=4*sizeof(double);
          }
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          else
          {
            my_printf_error(ER_BLOB_KEY_WITHOUT_LENGTH,
                            ER(ER_BLOB_KEY_WITHOUT_LENGTH),MYF(0),
                            column->field_name);
            DBUG_RETURN(-1);
          }
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	}
      }
      if (!(sql_field->flags & NOT_NULL_FLAG))
      {
	if (key->type == Key::PRIMARY)
	{
	  my_error(ER_PRIMARY_CANT_HAVE_NULL, MYF(0));
	  DBUG_RETURN(-1);
	}
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	if (!(file->table_flags() & HA_NULL_KEY))
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	{
	  my_printf_error(ER_NULL_COLUMN_IN_INDEX,ER(ER_NULL_COLUMN_IN_INDEX),
			  MYF(0),column->field_name);
	  DBUG_RETURN(-1);
	}
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	key_info->flags|= HA_NULL_PART_KEY;
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      }
      if (MTYP_TYPENR(sql_field->unireg_check) == Field::NEXT_NUMBER)
      {
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	if (column_nr == 0 || (file->table_flags() & HA_AUTO_PART_KEY))
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	  auto_increment--;			// Field is used
      }
      key_part_info->fieldnr= field;
      key_part_info->offset=  (uint16) sql_field->offset;
      key_part_info->key_type=sql_field->pack_flag;
      uint length=sql_field->pack_length;
      if (column->length)
      {
	if (f_is_blob(sql_field->pack_flag))
	{
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	  if ((length=column->length) > file->max_key_length() ||
	      length > file->max_key_part_length())
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	  {
	    my_error(ER_WRONG_SUB_KEY,MYF(0));
	    DBUG_RETURN(-1);
	  }
	}
	else if (column->length > length ||
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		 ((f_is_packed(sql_field->pack_flag) || 
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		   ((file->table_flags() & HA_NO_PREFIX_CHAR_KEYS) &&
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		    (key_info->flags & HA_NOSAME))) &&
		  column->length != length))
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	{
	  my_error(ER_WRONG_SUB_KEY,MYF(0));
	  DBUG_RETURN(-1);
	}
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	if (!(file->table_flags() & HA_NO_PREFIX_CHAR_KEYS))
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	  length=column->length;
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      }
      else if (length == 0)
      {
	my_printf_error(ER_WRONG_KEY_COLUMN, ER(ER_WRONG_KEY_COLUMN), MYF(0),
			column->field_name);
	  DBUG_RETURN(-1);
      }
      key_part_info->length=(uint8) length;
      /* Use packed keys for long strings on the first column */
      if (!(db_options & HA_OPTION_NO_PACK_KEYS) &&
	  (length >= KEY_DEFAULT_PACK_LENGTH &&
	   (sql_field->sql_type == FIELD_TYPE_STRING ||
	    sql_field->sql_type == FIELD_TYPE_VAR_STRING ||
	    sql_field->pack_flag & FIELDFLAG_BLOB)))
      {
	if (column_nr == 0 && (sql_field->pack_flag & FIELDFLAG_BLOB))
	  key_info->flags|= HA_BINARY_PACK_KEY;
	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)
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	{
	  if (primary_key)
	  {
	    my_error(ER_MULTIPLE_PRI_KEY,MYF(0));
	    DBUG_RETURN(-1);
	  }
	  key_name=primary_key_name;
	  primary_key=1;
	}
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	else if (!(key_name = key->name))
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	  key_name=make_unique_key_name(sql_field->field_name,
					key_info_buffer,key_info);
	if (check_if_keyname_exists(key_name,key_info_buffer,key_info))
	{
	  my_error(ER_DUP_KEYNAME,MYF(0),key_name);
	  DBUG_RETURN(-1);
	}
	key_info->name=(char*) key_name;
      }
    }
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    if (!(key_info->flags & HA_NULL_PART_KEY))
      unique_key=1;
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    key_info->key_length=(uint16) key_length;
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    uint max_key_length= min(file->max_key_length(), MAX_KEY_LENGTH);
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    if (key_length > max_key_length && key->type != Key::FULLTEXT)
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    {
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      my_error(ER_TOO_LONG_KEY,MYF(0),max_key_length);
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      DBUG_RETURN(-1);
    }
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    key_info++;
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  }
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  if (!unique_key && !primary_key &&
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      (file->table_flags() & HA_REQUIRE_PRIMARY_KEY))
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  {
    my_error(ER_REQUIRES_PRIMARY_KEY,MYF(0));
    DBUG_RETURN(-1);
  }
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  if (auto_increment > 0)
  {
    my_error(ER_WRONG_AUTO_KEY,MYF(0));
    DBUG_RETURN(-1);
  }
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  /* Sort keys in optimized order */
  qsort((gptr) key_info_buffer, key_count, sizeof(KEY), (qsort_cmp) sort_keys);
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      /* Check if table exists */
  if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
  {
    sprintf(path,"%s%s%lx_%lx_%x%s",mysql_tmpdir,tmp_file_prefix,
	    current_pid, thd->thread_id, thd->tmp_table++,reg_ext);
    create_info->table_options|=HA_CREATE_DELAY_KEY_WRITE;
  }
  else
    (void) sprintf(path,"%s/%s/%s%s",mysql_data_home,db,table_name,reg_ext);
  unpack_filename(path,path);
  /* Check if table already exists */
  if ((create_info->options & HA_LEX_CREATE_TMP_TABLE)
      && find_temporary_table(thd,db,table_name))
  {
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    if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
      DBUG_RETURN(0);
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    my_error(ER_TABLE_EXISTS_ERROR,MYF(0),table_name);
    DBUG_RETURN(-1);
  }
  VOID(pthread_mutex_lock(&LOCK_open));
  if (!tmp_table && !(create_info->options & HA_LEX_CREATE_TMP_TABLE))
  {
    if (!access(path,F_OK))
    {
      VOID(pthread_mutex_unlock(&LOCK_open));
      if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
	DBUG_RETURN(0);
      my_error(ER_TABLE_EXISTS_ERROR,MYF(0),table_name);
      DBUG_RETURN(-1);
    }
  }

  thd->proc_info="creating table";

  create_info->table_options=db_options;
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  if (rea_create_table(thd, path, create_info, fields, key_count,
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		       key_info_buffer))
  {
    /* my_error(ER_CANT_CREATE_TABLE,MYF(0),table_name,my_errno); */
    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;
    }
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    thd->lex.tmp_table_used= 1;
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  }
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  if (!tmp_table && !no_log)
  {
    // Must be written before unlock
    mysql_update_log.write(thd,thd->query, thd->query_length);
    if (mysql_bin_log.is_open())
    {
      Query_log_event qinfo(thd, thd->query, thd->query_length,
			    test(create_info->options &
				 HA_LEX_CREATE_TMP_TABLE));
      mysql_bin_log.write(&qinfo);
    }
  }
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  error=0;
end:
  VOID(pthread_mutex_unlock(&LOCK_open));
  thd->proc_info="After create";
  DBUG_RETURN(error);
}

/*
** 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++)
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    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;

  if (!check_if_keyname_exists(field_name,start,end))
    return (char*) field_name;			// Use fieldname
  buff_end=strmake(buff,field_name,MAX_FIELD_NAME-4);
  for (uint i=2 ; ; i++)
  {
    sprintf(buff_end,"_%d",i);
    if (!check_if_keyname_exists(buff,start,end))
      return sql_strdup(buff);
  }
}

/****************************************************************************
** Create table from a list of fields and items
****************************************************************************/

TABLE *create_table_from_items(THD *thd, HA_CREATE_INFO *create_info,
			       const char *db, const char *name,
			       List<create_field> *extra_fields,
			       List<Key> *keys,
			       List<Item> *items,
			       MYSQL_LOCK **lock)
{
  TABLE tmp_table;		// Used during 'create_field()'
  TABLE *table;
  tmp_table.table_name=0;
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  uint select_field_count= items->elements;
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  DBUG_ENTER("create_table_from_items");

  /* Add selected items to field list */
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  List_iterator_fast<Item> it(*items);
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  Item *item;
  Field *tmp_field;
  tmp_table.db_create_options=0;
  tmp_table.null_row=tmp_table.maybe_null=0;
  tmp_table.blob_ptr_size=portable_sizeof_char_ptr;
  tmp_table.db_low_byte_first= test(create_info->db_type == DB_TYPE_MYISAM ||
				    create_info->db_type == DB_TYPE_HEAP);

  while ((item=it++))
  {
    create_field *cr_field;
    if (strlen(item->name) > NAME_LEN ||
	check_column_name(item->name))
    {
      my_error(ER_WRONG_COLUMN_NAME,MYF(0),item->name);
      DBUG_RETURN(0);
    }
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    Field *field;
    if (item->type() == Item::FUNC_ITEM)
      field=item->tmp_table_field(&tmp_table);
    else
      field=create_tmp_field(thd, &tmp_table, item, item->type(),
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				  (Item_result_field***) 0, &tmp_field,0,0);
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    if (!field ||
	!(cr_field=new create_field(field,(item->type() == Item::FIELD_ITEM ?
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					   ((Item_field *)item)->field :
					   (Field*) 0))))
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      DBUG_RETURN(0);
    extra_fields->push_back(cr_field);
  }
  /* create and lock table */
  /* QQ: This should be done atomic ! */
  if (mysql_create_table(thd,db,name,create_info,*extra_fields,
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			 *keys,0,1,select_field_count)) // no logging
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    DBUG_RETURN(0);
  if (!(table=open_table(thd,db,name,name,(bool*) 0)))
  {
    quick_rm_table(create_info->db_type,db,name);
    DBUG_RETURN(0);
  }
  table->reginfo.lock_type=TL_WRITE;
  if (!((*lock)=mysql_lock_tables(thd,&table,1)))
  {
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    VOID(pthread_mutex_lock(&LOCK_open));
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    hash_delete(&open_cache,(byte*) table);
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    VOID(pthread_mutex_unlock(&LOCK_open));
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    quick_rm_table(create_info->db_type,db,name);
    DBUG_RETURN(0);
  }
  table->file->extra(HA_EXTRA_WRITE_CACHE);
  DBUG_RETURN(table);
}


/****************************************************************************
** Alter a table definition
****************************************************************************/

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bool
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mysql_rename_table(enum db_type base,
		   const char *old_db,
		   const char * old_name,
		   const char *new_db,
		   const char * new_name)
{
  char from[FN_REFLEN],to[FN_REFLEN];
  handler *file=get_new_handler((TABLE*) 0, base);
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  int error=0;
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  DBUG_ENTER("mysql_rename_table");
  (void) sprintf(from,"%s/%s/%s",mysql_data_home,old_db,old_name);
  (void) sprintf(to,"%s/%s/%s",mysql_data_home,new_db,new_name);
  fn_format(from,from,"","",4);
  fn_format(to,to,    "","",4);
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  if (!(error=file->rename_table((const char*) from,(const char *) to)))
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  {
    if (rename_file_ext(from,to,reg_ext))
    {
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      error=my_errno;
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      /* Restore old file name */
      file->rename_table((const char*) to,(const char *) from);
    }
  }
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  delete file;
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  if (error)
    my_error(ER_ERROR_ON_RENAME, MYF(0), from, to, error);
  DBUG_RETURN(error != 0);
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}

/*
  close table in this thread and force close + reopen in other threads
  This assumes that the calling thread has lock on LOCK_open
  Win32 clients must also have a WRITE LOCK on the table !
*/

bool close_cached_table(THD *thd,TABLE *table)
{
  bool result=0;
  DBUG_ENTER("close_cached_table");
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  safe_mutex_assert_owner(&LOCK_open);

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  if (table)
  {
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    DBUG_PRINT("enter",("table: %s", table->real_name));
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    VOID(table->file->extra(HA_EXTRA_FORCE_REOPEN)); // Close all data files
    /* Mark all tables that are in use as 'old' */
    mysql_lock_abort(thd,table);		 // end threads waiting on lock

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#if defined(USING_TRANSACTIONS) || defined( __WIN__) || defined( __EMX__) || !defined(OS2)
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    /* Wait until all there are no other threads that has this table open */
    while (remove_table_from_cache(thd,table->table_cache_key,
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				   table->real_name))
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    {
      dropping_tables++;
      (void) pthread_cond_wait(&COND_refresh,&LOCK_open);
      dropping_tables--;
    }
#else
    (void) remove_table_from_cache(thd,table->table_cache_key,
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				   table->real_name);
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#endif
    /* When lock on LOCK_open is freed other threads can continue */
    pthread_cond_broadcast(&COND_refresh);

    /* Close lock if this is not got with LOCK TABLES */
    if (thd->lock)
    {
      mysql_unlock_tables(thd, thd->lock); thd->lock=0;	// Start locked threads
    }
    /* Close all copies of 'table'.  This also frees all LOCK TABLES lock */
    thd->open_tables=unlink_open_table(thd,thd->open_tables,table);
  }
  DBUG_RETURN(result);
}

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static int send_check_errmsg(THD *thd, TABLE_LIST* table,
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			     const char* operator_name, const char* errmsg)
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{
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  Protocol *protocol= thd->protocol;
  protocol->prepare_for_resend();
  protocol->store(table->alias);
  protocol->store((char*) operator_name);
  protocol->store("error", 5);
  protocol->store(errmsg);
1054
  thd->net.last_error[0]=0;
1055
  if (protocol->write())
1056 1057 1058 1059
    return -1;
  return 1;
}

1060

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1061
static int prepare_for_restore(THD* thd, TABLE_LIST* table,
1062
			       HA_CHECK_OPT *check_opt)
1063
{
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1064
  DBUG_ENTER("prepare_for_restore");
1065

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  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"
				  ));
  }
1072
  else
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  {
    char* backup_dir = thd->lex.backup_dir;
    char src_path[FN_REFLEN], dst_path[FN_REFLEN];
1076
    char* table_name = table->real_name;
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    char* db = thd->db ? thd->db : table->db;
1078

1079 1080
    if (fn_format_relative_to_data_home(src_path, table_name, backup_dir,
					reg_ext))
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1081
      DBUG_RETURN(-1); // protect buffer overflow
1082

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1083
    sprintf(dst_path, "%s/%s/%s", mysql_real_data_home, db, table_name);
1084

1085
    if (lock_and_wait_for_table_name(thd,table))
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1086
      DBUG_RETURN(-1);
1087

1088
    if (my_copy(src_path,
1089 1090
		fn_format(dst_path, dst_path,"", reg_ext, 4),
		MYF(MY_WME)))
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1091
    {
1092
      pthread_mutex_lock(&LOCK_open);
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1093
      unlock_table_name(thd, table);
1094
      pthread_mutex_unlock(&LOCK_open);
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      DBUG_RETURN(send_check_errmsg(thd, table, "restore",
				    "Failed copying .frm file"));
    }
1098
    if (mysql_truncate(thd, table, 1))
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1099
    {
1100
      pthread_mutex_lock(&LOCK_open);
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      unlock_table_name(thd, table);
1102
      pthread_mutex_unlock(&LOCK_open);
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      DBUG_RETURN(send_check_errmsg(thd, table, "restore",
				    "Failed generating table from .frm file"));
1105
    }
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1106
  }
1107

1108 1109 1110 1111
  /*
    Now we should be able to open the partially restored table
    to finish the restore in the handler later on
  */
1112
  if (!(table->table = reopen_name_locked_table(thd, table)))
1113 1114
  {
    pthread_mutex_lock(&LOCK_open);
1115
    unlock_table_name(thd, table);
1116 1117
    pthread_mutex_unlock(&LOCK_open);
  }
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1118
  DBUG_RETURN(0);
1119
}
1120

1121

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1122
static int prepare_for_repair(THD* thd, TABLE_LIST* table,
1123
			      HA_CHECK_OPT *check_opt)
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{
  DBUG_ENTER("prepare_for_repair");

  if (!(check_opt->sql_flags & TT_USEFRM))
  {
    DBUG_RETURN(0);
  }
  else
  {

1134
    char from[FN_REFLEN],tmp[FN_REFLEN];
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    char* db = thd->db ? thd->db : table->db;

1137
    sprintf(from, "%s/%s/%s", mysql_real_data_home, db, table->real_name);
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1138
    fn_format(from, from, "", MI_NAME_DEXT, 4);
1139
    sprintf(tmp,"%s-%lx_%lx", from, current_pid, thd->thread_id);
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1140

1141
    pthread_mutex_lock(&LOCK_open);
1142
    close_cached_table(thd,table->table);
1143
    pthread_mutex_unlock(&LOCK_open);
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1144 1145 1146 1147

    if (lock_and_wait_for_table_name(thd,table))
      DBUG_RETURN(-1);

1148
    if (my_rename(from, tmp, MYF(MY_WME)))
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1149
    {
1150
      pthread_mutex_lock(&LOCK_open);
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1151
      unlock_table_name(thd, table);
1152
      pthread_mutex_unlock(&LOCK_open);
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1153 1154 1155 1156 1157
      DBUG_RETURN(send_check_errmsg(thd, table, "repair",
				    "Failed renaming .MYD file"));
    }
    if (mysql_truncate(thd, table, 1))
    {
1158
      pthread_mutex_lock(&LOCK_open);
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1159
      unlock_table_name(thd, table);
1160
      pthread_mutex_unlock(&LOCK_open);
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      DBUG_RETURN(send_check_errmsg(thd, table, "repair",
				    "Failed generating table from .frm file"));
    }
1164
    if (my_rename(tmp, from, MYF(MY_WME)))
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1165
    {
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1166
      pthread_mutex_lock(&LOCK_open);
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1167
      unlock_table_name(thd, table);
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1168
      pthread_mutex_unlock(&LOCK_open);
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      DBUG_RETURN(send_check_errmsg(thd, table, "repair",
				    "Failed restoring .MYD file"));
    }
  }

1174 1175 1176 1177
  /*
    Now we should be able to open the partially repaired table
    to finish the repair in the handler later on.
  */
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1178
  if (!(table->table = reopen_name_locked_table(thd, table)))
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  {
    pthread_mutex_lock(&LOCK_open);
    unlock_table_name(thd, table);
    pthread_mutex_unlock(&LOCK_open);
  }
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1184 1185
  DBUG_RETURN(0);
}
1186

1187

1188 1189
static int mysql_admin_table(THD* thd, TABLE_LIST* tables,
			     HA_CHECK_OPT* check_opt,
1190
			     const char *operator_name,
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1191
			     thr_lock_type lock_type,
1192
			     bool open_for_modify,
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1193
			     uint extra_open_options,
1194 1195
			     int (*prepare_func)(THD *, TABLE_LIST *,
						 HA_CHECK_OPT *),
1196 1197
			     int (handler::*operator_func)
			     (THD *, HA_CHECK_OPT *))
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1198 1199 1200
{
  TABLE_LIST *table;
  List<Item> field_list;
1201 1202
  Item *item;
  Protocol *protocol= thd->protocol;
1203
  DBUG_ENTER("mysql_admin_table");
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1204 1205 1206 1207 1208 1209 1210 1211 1212

  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;
1213
  if (protocol->send_fields(&field_list, 1))
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    DBUG_RETURN(-1);

  for (table = tables; table; table = table->next)
  {
    char table_name[NAME_LEN*2+2];
    char* db = (table->db) ? table->db : thd->db;
1220
    bool fatal_error=0;
1221
    strxmov(table_name,db ? db : "",".",table->real_name,NullS);
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1222

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1223
    thd->open_options|= extra_open_options;
1224
    table->table = open_ltable(thd, table, lock_type);
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1225
    thd->open_options&= ~extra_open_options;
1226

1227
    if (prepare_func)
1228
    {
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1229
      switch ((*prepare_func)(thd, table, check_opt)) {
1230 1231 1232
        case  1: continue; // error, message written to net
        case -1: goto err; // error, message could be written to net
        default:         ; // should be 0 otherwise
1233
      }
1234
    }
1235

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1236 1237 1238
    if (!table->table)
    {
      const char *err_msg;
1239 1240 1241 1242
      protocol->prepare_for_resend();
      protocol->store(table_name);
      protocol->store(operator_name);
      protocol->store("error",5);
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1243 1244
      if (!(err_msg=thd->net.last_error))
	err_msg=ER(ER_CHECK_NO_SUCH_TABLE);
1245
      protocol->store(err_msg);
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1246
      thd->net.last_error[0]=0;
1247
      if (protocol->write())
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	goto err;
      continue;
    }
1251
    if ((table->table->db_stat & HA_READ_ONLY) && open_for_modify)
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1252
    {
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1253
      char buff[FN_REFLEN + MYSQL_ERRMSG_SIZE];
1254 1255 1256 1257
      protocol->prepare_for_resend();
      protocol->store(table_name);
      protocol->store(operator_name);
      protocol->store("error", 5);
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1258
      sprintf(buff, ER(ER_OPEN_AS_READONLY), table_name);
1259
      protocol->store(buff);
1260
      close_thread_tables(thd);
1261
      table->table=0;				// For query cache
1262
      if (protocol->write())
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	goto err;
      continue;
    }

1267
    /* Close all instances of the table to allow repair to rename files */
1268
    if (lock_type == TL_WRITE && table->table->version)
1269 1270
    {
      pthread_mutex_lock(&LOCK_open);
1271 1272
      const char *old_message=thd->enter_cond(&COND_refresh, &LOCK_open,
					      "Waiting to get writelock");
1273 1274 1275 1276 1277 1278 1279 1280 1281
      mysql_lock_abort(thd,table->table);
      while (remove_table_from_cache(thd, table->table->table_cache_key,
				     table->table->real_name) &&
	     ! thd->killed)
      {
	dropping_tables++;
	(void) pthread_cond_wait(&COND_refresh,&LOCK_open);
	dropping_tables--;
      }
1282
      thd->exit_cond(old_message);
1283 1284 1285
      pthread_mutex_unlock(&LOCK_open);
      if (thd->killed)
	goto err;
1286
      open_for_modify=0;
1287 1288
    }

1289
    int result_code = (table->table->file->*operator_func)(thd, check_opt);
1290 1291 1292
    protocol->prepare_for_resend();
    protocol->store(table_name);
    protocol->store(operator_name);
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1293

1294 1295
    switch (result_code) {
    case HA_ADMIN_NOT_IMPLEMENTED:
1296 1297
      {
        char buf[ERRMSGSIZE+20];
1298 1299 1300 1301
        uint length=my_snprintf(buf, ERRMSGSIZE,
				ER(ER_CHECK_NOT_IMPLEMENTED), operator_name);
        protocol->store("error", 5);
        protocol->store(buf, length);
1302
      }
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1303 1304
      break;

1305
    case HA_ADMIN_OK:
1306 1307
      protocol->store("status", 6);
      protocol->store("OK",2);
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1308 1309
      break;

1310
    case HA_ADMIN_FAILED:
1311 1312
      protocol->store("status", 6);
      protocol->store("Operation failed",16);
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1313 1314
      break;

1315
    case HA_ADMIN_ALREADY_DONE:
1316 1317
      protocol->store("status", 6);
      protocol->store("Table is already up to date", 27);
1318 1319
      break;

1320
    case HA_ADMIN_CORRUPT:
1321 1322
      protocol->store("error", 5);
      protocol->store("Corrupt", 8);
1323
      fatal_error=1;
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1324 1325
      break;

1326
    case HA_ADMIN_INVALID:
1327 1328
      protocol->store("error", 5);
      protocol->store("Invalid argument",16);
1329 1330
      break;

1331
    default:				// Probably HA_ADMIN_INTERNAL_ERROR
1332 1333
      protocol->store("error", 5);
      protocol->store("Unknown - internal error during operation", 41);
1334
      fatal_error=1;
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1335 1336
      break;
    }
1337
    if (fatal_error)
1338
      table->table->version=0;			// Force close of table
1339
    else if (open_for_modify)
1340
    {
1341
      pthread_mutex_lock(&LOCK_open);
1342 1343
      remove_table_from_cache(thd, table->table->table_cache_key,
			      table->table->real_name);
1344
      pthread_mutex_unlock(&LOCK_open);
1345 1346 1347
      /* May be something modified consequently we have to invalidate cache */
      query_cache_invalidate3(thd, table->table, 0);
    }
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1348
    close_thread_tables(thd);
1349
    table->table=0;				// For query cache
1350
    if (protocol->write())
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1351 1352 1353
      goto err;
  }

1354
  send_eof(thd);
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1355 1356
  DBUG_RETURN(0);
 err:
1357
  close_thread_tables(thd);			// Shouldn't be needed
1358 1359
  if (table)
    table->table=0;
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1360 1361 1362
  DBUG_RETURN(-1);
}

1363

1364 1365 1366 1367
int mysql_backup_table(THD* thd, TABLE_LIST* table_list)
{
  DBUG_ENTER("mysql_backup_table");
  DBUG_RETURN(mysql_admin_table(thd, table_list, 0,
1368
				"backup", TL_READ, 0, 0, 0,
1369 1370
				&handler::backup));
}
1371

1372

1373 1374 1375 1376
int mysql_restore_table(THD* thd, TABLE_LIST* table_list)
{
  DBUG_ENTER("mysql_restore_table");
  DBUG_RETURN(mysql_admin_table(thd, table_list, 0,
1377 1378
				"restore", TL_WRITE, 1, 0,
                                &prepare_for_restore,
1379 1380
				&handler::restore));
}
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1381

1382

1383 1384 1385 1386
int mysql_repair_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT* check_opt)
{
  DBUG_ENTER("mysql_repair_table");
  DBUG_RETURN(mysql_admin_table(thd, tables, check_opt,
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1387 1388
				"repair", TL_WRITE, 1, HA_OPEN_FOR_REPAIR,
                                &prepare_for_repair,
1389 1390 1391
				&handler::repair));
}

1392

1393 1394 1395 1396
int mysql_optimize_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT* check_opt)
{
  DBUG_ENTER("mysql_optimize_table");
  DBUG_RETURN(mysql_admin_table(thd, tables, check_opt,
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1397
				"optimize", TL_WRITE, 1,0,0,
1398 1399 1400 1401
				&handler::optimize));
}


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/*
  Create a table identical to the specified table

  SYNOPSIS
    mysql_create_like_table()
    thd	        Thread object
    table       Table list (one table only)
    create_info Create info
    table_ident Src table_ident

  RETURN VALUES
    0	  ok
    -1	error
*/

int mysql_create_like_table(THD* thd, TABLE_LIST* table, 
                            HA_CREATE_INFO *create_info,
                            Table_ident *table_ident)
{
  TABLE **tmp_table;
  char src_path[FN_REFLEN], dst_path[FN_REFLEN];
  char *db= table->db;
  char *table_name= table->real_name;
  char *src_db= thd->db;
  char *src_table= table_ident->table.str;
  int  err;
 
  DBUG_ENTER("mysql_create_like_table");

  /*
    Validate the source table
  */
  if (table_ident->table.length > NAME_LEN ||
      (table_ident->table.length &&
       check_table_name(src_table,table_ident->table.length)) ||
      table_ident->db.str && check_db_name((src_db= table_ident->db.str)))
  {
1439 1440
    my_error(ER_WRONG_TABLE_NAME, MYF(0), src_table);
    DBUG_RETURN(-1);
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  }

  if ((tmp_table= find_temporary_table(thd, src_db, src_table)))
    strxmov(src_path, (*tmp_table)->path, reg_ext, NullS);
  else
  {
    strxmov(src_path, mysql_data_home, "/", src_db, "/", src_table, 
            reg_ext, NullS); 
    if (access(src_path, F_OK))
    {
      my_error(ER_BAD_TABLE_ERROR, MYF(0), src_table);
      DBUG_RETURN(-1);
    }
  }

  /*
    Validate the destination table

    skip the destination table name checking as this is already 
    validated.
  */
  if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
  {
    if (find_temporary_table(thd, db, table_name))
      goto table_exists;
    sprintf(dst_path,"%s%s%lx_%lx_%x%s",mysql_tmpdir,tmp_file_prefix,
	    current_pid, thd->thread_id, thd->tmp_table++,reg_ext);
    create_info->table_options|= HA_CREATE_DELAY_KEY_WRITE;
  }
  else
  {
    strxmov(dst_path, mysql_data_home, "/", db, "/", table_name, 
            reg_ext, NullS); 
    if (!access(dst_path, F_OK))
      goto table_exists;
  }

  /* 
    Create a new table by copying from source table
  */
  if (my_copy(src_path, dst_path, MYF(MY_WME)))
    DBUG_RETURN(-1);

  /*
    As mysql_truncate don't work on a new table at this stage of 
    creation, instead create the table directly (for both normal 
    and temporary tables).
  */
  *fn_ext(dst_path)= 0; 
  err= ha_create_table(dst_path, create_info, 1);
  
  if (create_info->options & HA_LEX_CREATE_TMP_TABLE)
  {
    if (err || !open_temporary_table(thd, dst_path, db, table_name, 1))
    {
1496 1497 1498
      (void) rm_temporary_table(create_info->db_type, 
                                dst_path); /* purecov: inspected */
      DBUG_RETURN(-1);     /* purecov: inspected */
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    }
  }
  else if (err)
  {
1503 1504 1505
    (void) quick_rm_table(create_info->db_type, db, 
                          table_name); /* purecov: inspected */
    DBUG_RETURN(-1);       /* purecov: inspected */
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  }
  DBUG_RETURN(0);
  
table_exists:
  if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
  {
    char warn_buff[MYSQL_ERRMSG_SIZE];
    sprintf(warn_buff,ER(ER_TABLE_EXISTS_ERROR),table_name);
    push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, 
                 ER_TABLE_EXISTS_ERROR,warn_buff);
    DBUG_RETURN(0);
  }
  my_error(ER_TABLE_EXISTS_ERROR, MYF(0), table_name);
  DBUG_RETURN(-1);
}


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int mysql_analyze_table(THD* thd, TABLE_LIST* tables, HA_CHECK_OPT* check_opt)
{
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#ifdef OS2
  thr_lock_type lock_type = TL_WRITE;
#else
  thr_lock_type lock_type = TL_READ_NO_INSERT;
#endif

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  DBUG_ENTER("mysql_analyze_table");
  DBUG_RETURN(mysql_admin_table(thd, tables, check_opt,
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				"analyze", lock_type, 1,0,0,
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				&handler::analyze));
}


int mysql_check_table(THD* thd, TABLE_LIST* tables,HA_CHECK_OPT* check_opt)
{
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#ifdef OS2
  thr_lock_type lock_type = TL_WRITE;
#else
  thr_lock_type lock_type = TL_READ_NO_INSERT;
#endif

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  DBUG_ENTER("mysql_check_table");
  DBUG_RETURN(mysql_admin_table(thd, tables, check_opt,
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				"check", lock_type,
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				0, HA_OPEN_FOR_REPAIR, 0,
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				&handler::check));
}

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int mysql_alter_table(THD *thd,char *new_db, char *new_name,
		      HA_CREATE_INFO *create_info,
		      TABLE_LIST *table_list,
		      List<create_field> &fields,
		      List<Key> &keys,List<Alter_drop> &drop_list,
		      List<Alter_column> &alter_list,
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                      ORDER *order,
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		      bool drop_primary,
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		      enum enum_duplicates handle_duplicates,
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	              enum enum_enable_or_disable keys_onoff,
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                      bool simple_alter)
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{
  TABLE *table,*new_table;
  int error;
  char tmp_name[80],old_name[32],new_name_buff[FN_REFLEN],
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       *table_name,*db;
  char index_file[FN_REFLEN], data_file[FN_REFLEN];
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  bool use_timestamp=0;
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  ha_rows copied,deleted;
  ulonglong next_insert_id;
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  uint save_time_stamp,db_create_options, used_fields;
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  enum db_type old_db_type,new_db_type;
  DBUG_ENTER("mysql_alter_table");

  thd->proc_info="init";
  table_name=table_list->real_name;
  db=table_list->db;
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  if (!new_db || !strcmp(new_db,db))
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    new_db=db;
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  used_fields=create_info->used_fields;
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  if (!(table=open_ltable(thd,table_list,TL_WRITE_ALLOW_READ)))
    DBUG_RETURN(-1);

  /* Check that we are not trying to rename to an existing table */
  if (new_name)
  {
    strmov(new_name_buff,new_name);
    fn_same(new_name_buff,table_name,3);
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    if (lower_case_table_names)
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      my_casedn_str(system_charset_info,new_name);
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    if ((lower_case_table_names &&
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	 !my_strcasecmp(system_charset_info, new_name_buff,table_name)) ||
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	(!lower_case_table_names &&
	 !strcmp(new_name_buff,table_name)))
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      new_name=table_name;			// No. Make later check easier
    else
    {
      if (table->tmp_table)
      {
	if (find_temporary_table(thd,new_db,new_name_buff))
	{
	  my_error(ER_TABLE_EXISTS_ERROR,MYF(0),new_name);
	  DBUG_RETURN(-1);
	}
      }
      else
      {
	if (!access(fn_format(new_name_buff,new_name_buff,new_db,reg_ext,0),
		    F_OK))
	{
	  /* Table will be closed in do_command() */
	  my_error(ER_TABLE_EXISTS_ERROR,MYF(0),new_name);
	  DBUG_RETURN(-1);
	}
      }
    }
  }
  else
    new_name=table_name;

  old_db_type=table->db_type;
  if (create_info->db_type == DB_TYPE_DEFAULT)
    create_info->db_type=old_db_type;
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  new_db_type=create_info->db_type= ha_checktype(create_info->db_type);
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  if (create_info->row_type == ROW_TYPE_NOT_USED)
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    create_info->row_type=table->row_type;

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  /* In some simple cases we need not to recreate the table */
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  thd->proc_info="setup";
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  if (simple_alter && !table->tmp_table)
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  {
    error=0;
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    if (new_name != table_name || new_db != db)
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    {
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      thd->proc_info="rename";
      VOID(pthread_mutex_lock(&LOCK_open));
      /* Then do a 'simple' rename of the table */
      error=0;
      if (!access(new_name_buff,F_OK))
      {
        my_error(ER_TABLE_EXISTS_ERROR,MYF(0),new_name);
        error= -1;
      }
      else
      {
        *fn_ext(new_name)=0;
        close_cached_table(thd,table);
        if (mysql_rename_table(old_db_type,db,table_name,new_db,new_name))
	  error= -1;
      }
      VOID(pthread_cond_broadcast(&COND_refresh));
      VOID(pthread_mutex_unlock(&LOCK_open));
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    }
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    if (!error)
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    {
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      switch (keys_onoff) {
      case LEAVE_AS_IS:
	break;
      case ENABLE:
	error=table->file->activate_all_index(thd);
	break;
      case DISABLE:
	table->file->deactivate_non_unique_index(HA_POS_ERROR);
	break;
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      }
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    }
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    if (!error)
    {
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      mysql_update_log.write(thd, thd->query, thd->query_length);
      if (mysql_bin_log.is_open())
      {
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	Query_log_event qinfo(thd, thd->query, thd->query_length, 0);
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	mysql_bin_log.write(&qinfo);
      }
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      send_ok(thd);
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    }
    DBUG_RETURN(error);
  }

  /* Full alter table */
  restore_record(table,2);			// Empty record for DEFAULT
  List_iterator<Alter_drop> drop_it(drop_list);
  List_iterator<create_field> def_it(fields);
  List_iterator<Alter_column> alter_it(alter_list);
  List<create_field> create_list;		// Add new fields here
  List<Key> key_list;				// Add new keys here

  /*
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    First collect all fields from table which isn't in drop_list
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  */

  create_field *def;
  Field **f_ptr,*field;
  for (f_ptr=table->field ; (field= *f_ptr) ; f_ptr++)
  {
    /* Check if field should be droped */
    Alter_drop *drop;
    drop_it.rewind();
    while ((drop=drop_it++))
    {
      if (drop->type == Alter_drop::COLUMN &&
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	  !my_strcasecmp(system_charset_info,field->field_name, drop->name))
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      {
	/* Reset auto_increment value if it was dropped */
	if (MTYP_TYPENR(field->unireg_check) == Field::NEXT_NUMBER &&
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	    !(used_fields & HA_CREATE_USED_AUTO))
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	{
	  create_info->auto_increment_value=0;
	  create_info->used_fields|=HA_CREATE_USED_AUTO;
	}
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	break;
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      }
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    }
    if (drop)
    {
      drop_it.remove();
      continue;
    }
    /* Check if field is changed */
    def_it.rewind();
    while ((def=def_it++))
    {
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      if (def->change && 
          !my_strcasecmp(system_charset_info,field->field_name, def->change))
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	break;
    }
    if (def)
    {						// Field is changed
      def->field=field;
      if (def->sql_type == FIELD_TYPE_TIMESTAMP)
	use_timestamp=1;
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      if (!def->after)
      {
	create_list.push_back(def);
	def_it.remove();
      }
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    }
    else
    {						// Use old field value
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      create_list.push_back(def=new create_field(field,field));
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      if (def->sql_type == FIELD_TYPE_TIMESTAMP)
	use_timestamp=1;

      alter_it.rewind();			// Change default if ALTER
      Alter_column *alter;
      while ((alter=alter_it++))
      {
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	if (!my_strcasecmp(system_charset_info,field->field_name, alter->name))
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	  break;
      }
      if (alter)
      {
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        if (def->sql_type == FIELD_TYPE_BLOB)
        {
          my_error(ER_BLOB_CANT_HAVE_DEFAULT,MYF(0),def->change);
          DBUG_RETURN(-1);
        }
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	def->def=alter->def;			// Use new default
	alter_it.remove();
      }
    }
  }
  def_it.rewind();
  List_iterator<create_field> find_it(create_list);
  while ((def=def_it++))			// Add new columns
  {
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    if (def->change && ! def->field)
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    {
      my_error(ER_BAD_FIELD_ERROR,MYF(0),def->change,table_name);
      DBUG_RETURN(-1);
    }
    if (!def->after)
      create_list.push_back(def);
    else if (def->after == first_keyword)
      create_list.push_front(def);
    else
    {
      create_field *find;
      find_it.rewind();
      while ((find=find_it++))			// Add new columns
      {
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	if (!my_strcasecmp(system_charset_info,def->after, find->field_name))
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	  break;
      }
      if (!find)
      {
	my_error(ER_BAD_FIELD_ERROR,MYF(0),def->after,table_name);
	DBUG_RETURN(-1);
      }
      find_it.after(def);			// Put element after this
    }
  }
  if (alter_list.elements)
  {
    my_error(ER_BAD_FIELD_ERROR,MYF(0),alter_list.head()->name,table_name);
    DBUG_RETURN(-1);
  }
  if (!create_list.elements)
  {
    my_error(ER_CANT_REMOVE_ALL_FIELDS,MYF(0));
    DBUG_RETURN(-1);
  }

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

  List_iterator<Key> key_it(keys);
  List_iterator<create_field> field_it(create_list);
  List<key_part_spec> key_parts;

  KEY *key_info=table->key_info;
  for (uint i=0 ; i < table->keys ; i++,key_info++)
  {
    if (drop_primary && (key_info->flags & HA_NOSAME))
    {
      drop_primary=0;
      continue;
    }

    char *key_name=key_info->name;
    Alter_drop *drop;
    drop_it.rewind();
    while ((drop=drop_it++))
    {
      if (drop->type == Alter_drop::KEY &&
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	  !my_strcasecmp(system_charset_info,key_name, drop->name))
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	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)
	{
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	  if (!my_strcasecmp(system_charset_info, key_part_name,
			     cfield->change))
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	    break;
	}
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	else if (!my_strcasecmp(system_charset_info,
                                key_part_name, cfield->field_name))
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	  break;
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      }
      if (!cfield)
	continue;				// Field is removed
      uint key_part_length=key_part->length;
      if (cfield->field)			// Not new field
      {						// Check if sub key
	if (cfield->field->type() != FIELD_TYPE_BLOB &&
	    (cfield->field->pack_length() == key_part_length ||
	     cfield->length != cfield->pack_length ||
	     cfield->pack_length <= key_part_length))
	  key_part_length=0;			// Use whole field
      }
      key_parts.push_back(new key_part_spec(cfield->field_name,
					    key_part_length));
    }
    if (key_parts.elements)
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      key_list.push_back(new Key(key_info->flags & HA_SPATIAL ? Key::SPATIAL :
                                 (key_info->flags & HA_NOSAME ?
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				 (!my_strcasecmp(system_charset_info,
                                                 key_name, "PRIMARY") ?
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				  Key::PRIMARY  : Key::UNIQUE) :
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				  (key_info->flags & HA_FULLTEXT ?
				   Key::FULLTEXT : Key::MULTIPLE)),
				 key_name,
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                                 key_info->algorithm,
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				 key_parts));
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  }
  {
    Key *key;
    while ((key=key_it++))			// Add new keys
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    {
      if (key->type != Key::FOREIGN_KEY)
	key_list.push_back(key);
    }
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  }

  if (drop_list.elements)
  {
    my_error(ER_CANT_DROP_FIELD_OR_KEY,MYF(0),drop_list.head()->name);
    goto err;
  }
  if (alter_list.elements)
  {
    my_error(ER_CANT_DROP_FIELD_OR_KEY,MYF(0),alter_list.head()->name);
    goto err;
  }

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  db_create_options=table->db_create_options & ~(HA_OPTION_PACK_RECORD);
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  (void) sprintf(tmp_name,"%s-%lx_%lx", tmp_file_prefix, current_pid,
		 thd->thread_id);
  create_info->db_type=new_db_type;
  if (!create_info->comment)
    create_info->comment=table->comment;
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  /* let new create options override the old ones */
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  if (!(used_fields & HA_CREATE_USED_MIN_ROWS))
    create_info->min_rows=table->min_rows;
  if (!(used_fields & HA_CREATE_USED_MAX_ROWS))
    create_info->max_rows=table->max_rows;
  if (!(used_fields & HA_CREATE_USED_AVG_ROW_LENGTH))
    create_info->avg_row_length=table->avg_row_length;
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  if (!(used_fields & HA_CREATE_USED_CHARSET))
    create_info->table_charset=table->table_charset;
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  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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    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;

  if (table->tmp_table)
    create_info->options|=HA_LEX_CREATE_TMP_TABLE;

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  /*
    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);
    }
  }
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  else
    create_info->data_file_name=create_info->index_file_name=0;
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  if ((error=mysql_create_table(thd, new_db, tmp_name,
				create_info,
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				create_list,key_list,1,1,0))) // no logging
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    DBUG_RETURN(error);
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  if (table->tmp_table)
    new_table=open_table(thd,new_db,tmp_name,tmp_name,0);
  else
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  {
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    char path[FN_REFLEN];
    (void) sprintf(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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  }

  save_time_stamp=new_table->time_stamp;
  if (use_timestamp)
    new_table->time_stamp=0;
  new_table->next_number_field=new_table->found_next_number_field;
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  thd->count_cuted_fields=1;			// calc cuted fields
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  thd->cuted_fields=0L;
  thd->proc_info="copy to tmp table";
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  next_insert_id=thd->next_insert_id;		// Remember for loggin
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  copied=deleted=0;
  if (!new_table->is_view)
    error=copy_data_between_tables(table,new_table,create_list,
				   handle_duplicates,
				   order, &copied, &deleted);
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  thd->last_insert_id=next_insert_id;		// Needed for correct log
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  thd->count_cuted_fields=0;			// Don`t calc cuted fields
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  new_table->time_stamp=save_time_stamp;

  if (table->tmp_table)
  {
    /* We changed a temporary table */
    if (error)
    {
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      /* 
       * The following function call will also free a 
       * new_table pointer.
       * Therefore, here new_table pointer is not free'd as it is 
       * free'd in close_temporary() which is called by by the 
       * close_temporary_table() function.
      */
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      close_temporary_table(thd,new_db,tmp_name);
      goto err;
    }
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    /* Close lock if this is a transactional table */
    if (thd->lock)
    {
      mysql_unlock_tables(thd, thd->lock);
      thd->lock=0;
    }
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    /* Remove link to old table and rename the new one */
    close_temporary_table(thd,table->table_cache_key,table_name);
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    if (rename_temporary_table(thd, new_table, new_db, new_name))
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    {						// Fatal error
      close_temporary_table(thd,new_db,tmp_name);
      my_free((gptr) new_table,MYF(0));
      goto err;
    }
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    mysql_update_log.write(thd, thd->query,thd->query_length);
    if (mysql_bin_log.is_open())
    {
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      Query_log_event qinfo(thd, thd->query, thd->query_length, 0);
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      mysql_bin_log.write(&qinfo);
    }
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    goto end_temporary;
  }

  intern_close_table(new_table);		/* close temporary table */
  my_free((gptr) new_table,MYF(0));
  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;
  }
  /*
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    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
    from the cash, free all locks, close the old table and remove it.
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  */

  thd->proc_info="rename result table";
  sprintf(old_name,"%s2-%lx-%lx", tmp_file_prefix, current_pid,
	  thd->thread_id);
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  if (new_name != table_name || new_db != db)
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  {
    if (!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;
    }
  }

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#if (!defined( __WIN__) && !defined( __EMX__) && !defined( OS2))
  if (table->file->has_transactions())
#endif
  {
    /*
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      Win32 and InnoDB can't drop a table that is in use, so we must
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      close the original table at before doing the rename
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    */
    table_name=thd->strdup(table_name);		// must be saved
    if (close_cached_table(thd,table))
    {						// Aborted
      VOID(quick_rm_table(new_db_type,new_db,tmp_name));
      VOID(pthread_mutex_unlock(&LOCK_open));
      goto err;
    }
    table=0;					// Marker that table is closed
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  }
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#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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#endif

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  error=0;
  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,
			      new_name))
  {						// Try to get everything back
    error=1;
    VOID(quick_rm_table(new_db_type,new_db,new_name));
    VOID(quick_rm_table(new_db_type,new_db,tmp_name));
    VOID(mysql_rename_table(old_db_type,db,old_name,db,table_name));
  }
  if (error)
  {
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    /*
      This shouldn't happen.  We solve this the safe way by
      closing the locked table.
    */
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    close_cached_table(thd,table);
    VOID(pthread_mutex_unlock(&LOCK_open));
    goto err;
  }
  if (thd->lock || new_name != table_name)	// True if WIN32
  {
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    /*
      Not table locking or alter table with rename
      free locks and remove old table
    */
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    close_cached_table(thd,table);
    VOID(quick_rm_table(old_db_type,db,old_name));
  }
  else
  {
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    /*
      Using LOCK TABLES without rename.
      This code is never executed on WIN32!
      Remove old renamed table, reopen table and get new locks
    */
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    if (table)
    {
      VOID(table->file->extra(HA_EXTRA_FORCE_REOPEN)); // Use new file
      remove_table_from_cache(thd,db,table_name); // Mark all in-use copies old
      mysql_lock_abort(thd,table);		 // end threads waiting on lock
    }
    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
      close_cached_table(thd,table);		// Remove lock for table
      VOID(pthread_mutex_unlock(&LOCK_open));
      goto err;
    }
  }
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  /* The ALTER TABLE is always in it's own transaction */
  error = ha_commit_stmt(thd);
  if (ha_commit(thd))
    error=1;
  if (error)
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  {
    VOID(pthread_mutex_unlock(&LOCK_open));
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    VOID(pthread_cond_broadcast(&COND_refresh));
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    goto err;
  }
  thd->proc_info="end";
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  mysql_update_log.write(thd, thd->query,thd->query_length);
  if (mysql_bin_log.is_open())
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  {
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    Query_log_event qinfo(thd, thd->query, thd->query_length, 0);
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    mysql_bin_log.write(&qinfo);
  }
  VOID(pthread_cond_broadcast(&COND_refresh));
  VOID(pthread_mutex_unlock(&LOCK_open));
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#ifdef HAVE_BERKELEY_DB
  if (old_db_type == DB_TYPE_BERKELEY_DB)
  {
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    /*
      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.
    */
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    char path[FN_REFLEN];
    (void) sprintf(path,"%s/%s/%s",mysql_data_home,new_db,table_name);
    fn_format(path,path,"","",4);
    table=open_temporary_table(thd, path, new_db, tmp_name,0);
    if (table)
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    {
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      intern_close_table(table);
      my_free((char*) table, MYF(0));
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    }
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    else
      sql_print_error("Warning: Could not open BDB table %s.%s after rename\n",
		      new_db,table_name);
    (void) berkeley_flush_logs();
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  }
#endif
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  table_list->table=0;				// For query cache
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  query_cache_invalidate3(thd, table_list, 0);
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end_temporary:
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  sprintf(tmp_name,ER(ER_INSERT_INFO),(ulong) (copied+deleted),
	  (ulong) deleted, thd->cuted_fields);
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  send_ok(thd,copied+deleted,0L,tmp_name);
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  thd->some_tables_deleted=0;
  DBUG_RETURN(0);

 err:
  DBUG_RETURN(-1);
}


static int
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copy_data_between_tables(TABLE *from,TABLE *to,
                         List<create_field> &create,
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			 enum enum_duplicates handle_duplicates,
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                         ORDER *order,
			 ha_rows *copied,
                         ha_rows *deleted)
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{
  int error;
  Copy_field *copy,*copy_end;
  ulong found_count,delete_count;
  THD *thd= current_thd;
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  uint length;
  SORT_FIELD *sortorder;
  READ_RECORD info;
  Field *next_field;
  TABLE_LIST   tables;
  List<Item>   fields;
  List<Item>   all_fields;
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  ha_rows examined_rows;
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  DBUG_ENTER("copy_data_between_tables");

  if (!(copy= new Copy_field[to->fields]))
    DBUG_RETURN(-1);				/* purecov: inspected */

  to->file->external_lock(thd,F_WRLCK);
  to->file->extra(HA_EXTRA_WRITE_CACHE);
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  from->file->info(HA_STATUS_VARIABLE);
  to->file->deactivate_non_unique_index(from->file->records);
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  List_iterator<create_field> it(create);
  create_field *def;
  copy_end=copy;
  for (Field **ptr=to->field ; *ptr ; ptr++)
  {
    def=it++;
    if (def->field)
      (copy_end++)->set(*ptr,def->field,0);
  }

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  found_count=delete_count=0;

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  if (order)
  {
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    from->io_cache=(IO_CACHE*) my_malloc(sizeof(IO_CACHE),
                                         MYF(MY_FAE | MY_ZEROFILL));
    bzero((char*) &tables,sizeof(tables));
    tables.table = from;
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    tables.alias = tables.real_name= from->real_name;
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    tables.db	 = from->table_cache_key;
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    error=1;

    if (setup_order(thd, &tables, fields, all_fields, order) ||
        !(sortorder=make_unireg_sortorder(order, &length)) ||
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        (from->found_records = filesort(thd, from, sortorder, length, 
					(SQL_SELECT *) 0, HA_POS_ERROR,
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					&examined_rows))
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        == HA_POS_ERROR)
      goto err;
  };

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  /* 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.              */
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  error = ha_recovery_logging(thd,FALSE);
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  if (error)
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  {
    error = 1;
    goto err;
  }

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  init_read_record(&info, thd, from, (SQL_SELECT *) 0, 1,1);
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  if (handle_duplicates == DUP_IGNORE ||
      handle_duplicates == DUP_REPLACE)
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    to->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
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  next_field=to->next_number_field;
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  while (!(error=info.read_record(&info)))
  {
    if (thd->killed)
    {
      my_error(ER_SERVER_SHUTDOWN,MYF(0));
      error= 1;
      break;
    }
    if (next_field)
      next_field->reset();
    for (Copy_field *copy_ptr=copy ; copy_ptr != copy_end ; copy_ptr++)
      copy_ptr->do_copy(copy_ptr);
    if ((error=to->file->write_row((byte*) to->record[0])))
    {
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      if ((handle_duplicates != DUP_IGNORE &&
	   handle_duplicates != DUP_REPLACE) ||
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	  (error != HA_ERR_FOUND_DUPP_KEY &&
	   error != HA_ERR_FOUND_DUPP_UNIQUE))
      {
	to->file->print_error(error,MYF(0));
	break;
      }
      delete_count++;
    }
    else
      found_count++;
  }
  end_read_record(&info);
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  free_io_cache(from);
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  delete [] copy;				// This is never 0
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  uint tmp_error;
  if ((tmp_error=to->file->extra(HA_EXTRA_NO_CACHE)))
  {
    to->file->print_error(tmp_error,MYF(0));
    error=1;
  }
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  to->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
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  if (to->file->activate_all_index(thd))
    error=1;
2346

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  tmp_error = ha_recovery_logging(thd,TRUE);
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  /*
    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;
  if (to->file->external_lock(thd,F_UNLCK))
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    error=1;
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 err:
  free_io_cache(from);
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  *copied= found_count;
  *deleted=delete_count;
  DBUG_RETURN(error > 0 ? -1 : 0);
}