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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2009 Sun Microsystems, Inc.
*
* 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
*/
#include "config.h"
#include <drizzled/show.h>
#include <drizzled/session.h>
#include <drizzled/lock.h>
#include <drizzled/probes.h>
#include <drizzled/statement/delete.h>
namespace drizzled
{
bool statement::Delete::execute()
{
DRIZZLE_DELETE_START(session->getQueryString()->c_str());
TableList *first_table= (TableList *) session->lex->select_lex.table_list.first;
TableList *all_tables= session->lex->query_tables;
Select_Lex *select_lex= &session->lex->select_lex;
Select_Lex_Unit *unit= &session->lex->unit;
assert(first_table == all_tables && first_table != 0);
assert(select_lex->offset_limit == 0);
unit->set_limit(select_lex);
bool need_start_waiting= false;
if (! (need_start_waiting= not session->wait_if_global_read_lock(0, 1)))
{
return true;
}
bool res= delete_query(session, all_tables, select_lex->where,
&select_lex->order_list,
unit->select_limit_cnt, select_lex->options,
false);
/*
Release the protection against the global read lock and wake
everyone, who might want to set a global read lock.
*/
session->startWaitingGlobalReadLock();
return res;
}
} /* namespace drizzled */
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