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  • Committer: Monty Taylor
  • Date: 2009-04-25 20:45:19 UTC
  • mto: (997.2.5 mordred)
  • mto: This revision was merged to the branch mainline in revision 1003.
  • Revision ID: mordred@inaugust.com-20090425204519-lgrl7mz2r66v0jby
Blackhole.

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drizzled/statement/delete.cc
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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 *
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 *  Copyright (C) 2009 Sun Microsystems
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 *
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 *  This program is free software; you can redistribute it and/or modify
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 *  it under the terms of the GNU General Public License as published by
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 *  the Free Software Foundation; either version 2 of the License, or
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 *  (at your option) any later version.
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 *
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 *  This program is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *  GNU General Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License
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 *  along with this program; if not, write to the Free Software
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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#include "config.h"
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#include <drizzled/show.h>
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#include <drizzled/session.h>
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#include <drizzled/lock.h>
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#include <drizzled/probes.h>
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#include <drizzled/statement/delete.h>
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namespace drizzled
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{
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bool statement::Delete::execute()
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{
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  DRIZZLE_DELETE_START(session->query.c_str());
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  TableList *first_table= (TableList *) session->lex->select_lex.table_list.first;
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  TableList *all_tables= session->lex->query_tables;
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  Select_Lex *select_lex= &session->lex->select_lex;
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  Select_Lex_Unit *unit= &session->lex->unit;
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  assert(first_table == all_tables && first_table != 0);
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  assert(select_lex->offset_limit == 0);
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  unit->set_limit(select_lex);
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  bool need_start_waiting= false;
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  if (! (need_start_waiting= ! wait_if_global_read_lock(session, 0, 1)))
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  {
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    return true;
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  }
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  bool res= mysql_delete(session, all_tables, select_lex->where,
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                         &select_lex->order_list,
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                         unit->select_limit_cnt, select_lex->options,
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                         false);
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  /*
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    Release the protection against the global read lock and wake
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    everyone, who might want to set a global read lock.
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  */
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  start_waiting_global_read_lock(session);
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  return res;
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}
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} /* namespace drizzled */