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  • Committer: Jay Pipes
  • Date: 2009-08-16 14:14:39 UTC
  • mfrom: (1100.3.35 cleanup-exec-command)
  • mto: This revision was merged to the branch mainline in revision 1117.
  • Revision ID: jpipes@serialcoder-20090816141439-6ltll44rh3kq7io5
Merge Padraig's continued cleanup of exec command classes plus a couple merge conflict resolutions...

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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 <drizzled/server_includes.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/statement/delete.h>
 
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using namespace drizzled;
 
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bool statement::Delete::execute()
 
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{
 
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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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}