~drizzle-trunk/drizzle/development

/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-

 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:

 *

 *  Copyright (C) 2009 Sun Microsystems

 *

 *  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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

/**

 * @file Implementation of the AlterInfo class

 */

#include "drizzled/server_includes.h"

#include "drizzled/alter_info.h"

#include "drizzled/alter_drop.h"

#include "drizzled/alter_column.h"

#include "drizzled/key.h"

#include "drizzled/create_field.h"

AlterInfo::AlterInfo() :

  flags(),

  keys_onoff(LEAVE_AS_IS),

  tablespace_op(NO_TABLESPACE_OP),

  no_parts(0),

  build_method(HA_BUILD_DEFAULT),

  datetime_field(NULL),

  error_if_not_empty(false)

{}

void AlterInfo::reset()

{

  drop_list.empty();

  alter_list.empty();

  key_list.empty();

  create_list.empty();

  flags.reset();

  keys_onoff= LEAVE_AS_IS;

  tablespace_op= NO_TABLESPACE_OP;

  no_parts= 0;

  build_method= HA_BUILD_DEFAULT;

  datetime_field= 0;

  error_if_not_empty= false;

}

/**

  Construct a copy of this object to be used for mysql_alter_table

  and mysql_create_table.

  Historically, these two functions modify their AlterInfo

  arguments. This behaviour breaks re-execution of prepared

  statements and stored procedures and is compensated by always

  supplying a copy of AlterInfo to these functions.

  @return You need to use check the error in Session for out

  of memory condition after calling this function.

*/

AlterInfo::AlterInfo(const AlterInfo &rhs, MEM_ROOT *mem_root) :

  drop_list(rhs.drop_list, mem_root),

  alter_list(rhs.alter_list, mem_root),

  key_list(rhs.key_list, mem_root),

  create_list(rhs.create_list, mem_root),

  flags(rhs.flags),

  keys_onoff(rhs.keys_onoff),

  tablespace_op(rhs.tablespace_op),

  no_parts(rhs.no_parts),

  build_method(rhs.build_method),

  datetime_field(rhs.datetime_field),

  error_if_not_empty(rhs.error_if_not_empty)

{

  /*

    Make deep copies of used objects.

    This is not a fully deep copy - clone() implementations

    of AlterDrop, AlterColumn, Key, foreign_key, Key_part_spec

    do not copy string constants. At the same length the only

    reason we make a copy currently is that ALTER/CREATE TABLE

    code changes input AlterInfo definitions, but string

    constants never change.

  */

  list_copy_and_replace_each_value(drop_list, mem_root);

  list_copy_and_replace_each_value(alter_list, mem_root);

  list_copy_and_replace_each_value(key_list, mem_root);

  list_copy_and_replace_each_value(create_list, mem_root);

}