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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
*
* 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 <drizzled/server_includes.h>
#include <drizzled/show.h>
#include <drizzled/session.h>
#include <drizzled/statement/savepoint.h>
namespace drizzled
{
bool statement::Savepoint::execute()
{
if (! (session->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)))
{
session->my_ok();
}
else
{
SAVEPOINT **sv, *newsv;
for (sv= &session->transaction.savepoints; *sv; sv= &(*sv)->prev)
{
if (my_strnncoll(system_charset_info,
(unsigned char *) session->lex->ident.str,
session->lex->ident.length,
(unsigned char *) (*sv)->name,
(*sv)->length) == 0)
return false;
}
if (*sv) /* old savepoint of the same name exists */
{
newsv= *sv;
ha_release_savepoint(session, *sv); // it cannot fail
*sv= (*sv)->prev;
}
else if ((newsv= (SAVEPOINT *) alloc_root(&session->transaction.mem_root,
savepoint_alloc_size)) == 0)
{
my_error(ER_OUT_OF_RESOURCES, MYF(0));
return false;
}
newsv->name= strmake_root(&session->transaction.mem_root,
session->lex->ident.str,
session->lex->ident.length);
newsv->length= session->lex->ident.length;
/*
if we'll get an error here, don't add new savepoint to the list.
we'll lose a little bit of memory in transaction mem_root, but it'll
be free'd when transaction ends anyway
*/
if (ha_savepoint(session, newsv))
{
return true;
}
else
{
newsv->prev= session->transaction.savepoints;
session->transaction.savepoints= newsv;
session->my_ok();
}
}
return false;
}
} /* namespace drizzled */
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