Cleanup.

}

#ifdef NOT_USED

/*

  CREATE INDEX and DROP INDEX are implemented by calling ALTER TABLE with

  the proper arguments.  This isn't very fast but it should work for most

  cases.

  One should normally create all indexes with CREATE TABLE or ALTER TABLE.

*/

int mysql_create_indexes(THD *thd, TABLE_LIST *table_list, List<Key> &keys)

{

  List<create_field> fields;

  List<Alter_drop>   drop;

  List<Alter_column> alter;

  HA_CREATE_INFO     create_info;

  int		     rc;

  uint		     idx;

  uint		     db_options;

  uint		     key_count;

  TABLE		     *table;

  Field		     **f_ptr;

  KEY		     *key_info_buffer;

  char		     path[FN_REFLEN+1];

  DBUG_ENTER("mysql_create_index");

  /*

    Try to use online generation of index.

    This requires that all indexes can be created online.

    Otherwise, the old alter table procedure is executed.

    Open the table to have access to the correct table handler.

  */

  if (!(table=open_ltable(thd,table_list,TL_WRITE_ALLOW_READ)))

    DBUG_RETURN(-1);

  /*

    The add_index method takes an array of KEY structs for the new indexes.

    Preparing a new table structure generates this array.

    It needs a list with all fields of the table, which does not need to

    be correct in every respect. The field names are important.

  */

  for (f_ptr= table->field; *f_ptr; f_ptr++)

  {

    create_field *c_fld= new create_field(*f_ptr, *f_ptr);

    c_fld->unireg_check= Field::NONE; /*avoid multiple auto_increments*/

    fields.push_back(c_fld);

  }

  bzero((char*) &create_info,sizeof(create_info));

  create_info.db_type=DB_TYPE_DEFAULT;

  create_info.default_table_charset= thd->variables.collation_database;

  db_options= 0;

  if (mysql_prepare_table(thd, &create_info, &fields,

			  &keys, /*tmp_table*/ 0, &db_options, table->file,

			  &key_info_buffer, key_count,

			  /*select_field_count*/ 0))

    DBUG_RETURN(-1);

  /*

    Check if all keys can be generated with the add_index method.

    If anyone cannot, then take the old way.

  */

  for (idx=0; idx< key_count; idx++)

  {

    DBUG_PRINT("info", ("creating index %s", key_info_buffer[idx].name));

    if (!(table->file->index_ddl_flags(key_info_buffer+idx)&

	  (HA_DDL_ONLINE| HA_DDL_WITH_LOCK)))

      break ;

  }

  if ((idx < key_count)|| !key_count)

  {

    /* Re-initialize the create_info, which was changed by prepare table. */

    bzero((char*) &create_info,sizeof(create_info));

    create_info.db_type=DB_TYPE_DEFAULT;

    create_info.default_table_charset= thd->variables.collation_database;

    /* Cleanup the fields list. We do not want to create existing fields. */

    fields.delete_elements();

    if (real_alter_table(thd, table_list->db, table_list->table_name,

			 &create_info, table_list, table,

			 fields, keys, drop, alter, 0, (ORDER*)0,

			 ALTER_ADD_INDEX, DUP_ERROR))

      /* Don't need to free((gptr) key_info_buffer);*/

      DBUG_RETURN(-1);

  }

  else

  {

    if (table->file->add_index(table, key_info_buffer, key_count)||

        build_table_path(path, sizeof(path), table_list->db,

                         (lower_case_table_names == 2) ?

                         table_list->alias : table_list->table_name,

                         reg_ext) == 0 ||

	mysql_create_frm(thd, path, &create_info,

			 fields, key_count, key_info_buffer, table->file))

      /* don't need to free((gptr) key_info_buffer);*/

      DBUG_RETURN(-1);

  }

  /* don't need to free((gptr) key_info_buffer);*/

  DBUG_RETURN(0);

}

int mysql_drop_indexes(THD *thd, TABLE_LIST *table_list,

		       List<Alter_drop> &drop)

{

  List<create_field> fields;

  List<Key>	     keys;

  List<Alter_column> alter;

  HA_CREATE_INFO     create_info;

  uint		     idx;

  uint		     db_options;

  uint		     key_count;

  uint		     *key_numbers;

  TABLE		     *table;

  Field		     **f_ptr;

  KEY		     *key_info;

  KEY		     *key_info_buffer;

  char		     path[FN_REFLEN];

  DBUG_ENTER("mysql_drop_index");

  /*

    Try to use online generation of index.

    This requires that all indexes can be created online.

    Otherwise, the old alter table procedure is executed.

    Open the table to have access to the correct table handler.

  */

  if (!(table=open_ltable(thd,table_list,TL_WRITE_ALLOW_READ)))

    DBUG_RETURN(-1);

  /*

    The drop_index method takes an array of key numbers.

    It cannot get more entries than keys in the table.

  */

  key_numbers= (uint*) thd->alloc(sizeof(uint*)*table->keys);

  key_count= 0;

  /*

    Get the number of each key and check if it can be created online.

  */

  List_iterator<Alter_drop> drop_it(drop);

  Alter_drop *drop_key;

  while ((drop_key= drop_it++))

  {

    /* Find the key in the table. */

    key_info=table->key_info;

    for (idx=0; idx< table->keys; idx++, key_info++)

    {

      if (!my_strcasecmp(system_charset_info, key_info->name, drop_key->name))

	break;

    }

    if (idx>= table->keys)

    {

      my_error(ER_CANT_DROP_FIELD_OR_KEY, MYF(0), drop_key->name);

      /*don't need to free((gptr) key_numbers);*/

      DBUG_RETURN(-1);

    }

    /*

      Check if the key can be generated with the add_index method.

      If anyone cannot, then take the old way.

    */

    DBUG_PRINT("info", ("dropping index %s", table->key_info[idx].name));

    if (!(table->file->index_ddl_flags(table->key_info+idx)&

	  (HA_DDL_ONLINE| HA_DDL_WITH_LOCK)))

      break ;

    key_numbers[key_count++]= idx;

  }

  bzero((char*) &create_info,sizeof(create_info));

  create_info.db_type=DB_TYPE_DEFAULT;

  create_info.default_table_charset= thd->variables.collation_database;

  if ((drop_key)|| (drop.elements<= 0))

  {

    if (real_alter_table(thd, table_list->db, table_list->table_name,

			 &create_info, table_list, table,

			 fields, keys, drop, alter, 0, (ORDER*)0,

			 ALTER_DROP_INDEX, DUP_ERROR))

      /*don't need to free((gptr) key_numbers);*/

      DBUG_RETURN(-1);

  }

  else

  {

    db_options= 0;

    if (table->file->drop_index(table, key_numbers, key_count)||

	mysql_prepare_table(thd, &create_info, &fields,

			    &keys, /*tmp_table*/ 0, &db_options, table->file,

			    &key_info_buffer, key_count,

			    /*select_field_count*/ 0)||

        build_table_path(path, sizeof(path), table_list->db,

                         (lower_case_table_names == 2) ?

                         table_list->alias : table_list->table_name,

                         reg_ext) == 0 ||

	mysql_create_frm(thd, path, &create_info,

			 fields, key_count, key_info_buffer, table->file))

      /*don't need to free((gptr) key_numbers);*/

      DBUG_RETURN(-1);

  }

  /*don't need to free((gptr) key_numbers);*/

  DBUG_RETURN(0);

}

#endif /* NOT_USED */

/*

  Alter table

*/