Drizzled Public API Documentation

last_insert.cc

00001 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
00002  *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
00003  *
00004  *  Copyright (C) 2008 Sun Microsystems, Inc.
00005  *
00006  *  This program is free software; you can redistribute it and/or modify
00007  *  it under the terms of the GNU General Public License as published by
00008  *  the Free Software Foundation; version 2 of the License.
00009  *
00010  *  This program is distributed in the hope that it will be useful,
00011  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013  *  GNU General Public License for more details.
00014  *
00015  *  You should have received a copy of the GNU General Public License
00016  *  along with this program; if not, write to the Free Software
00017  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00018  */
00019 
00020 #include <config.h>
00021 
00022 #include <drizzled/function/last_insert.h>
00023 #include <drizzled/session.h>
00024 
00025 namespace drizzled
00026 {
00027 
00028 int64_t Item_func_last_insert_id::val_int()
00029 {
00030   assert(fixed == 1);
00031   if (arg_count)
00032   {
00033     int64_t value= args[0]->val_int();
00034     null_value= args[0]->null_value;
00035     /*
00036       LAST_INSERT_ID(X) must affect the client's insert_id() as
00037       documented in the manual. We don't want to touch
00038       first_successful_insert_id_in_cur_stmt because it would make
00039       LAST_INSERT_ID(X) take precedence over an generated auto_increment
00040       value for this row.
00041     */
00042     getSession().arg_of_last_insert_id_function= true;
00043     getSession().first_successful_insert_id_in_prev_stmt= value;
00044 
00045     return value;
00046   }
00047   return getSession().read_first_successful_insert_id_in_prev_stmt();
00048 }
00049 
00050 
00051 bool Item_func_last_insert_id::fix_fields(Session *session, Item **ref)
00052 {
00053   return Item_int_func::fix_fields(session, ref);
00054 }
00055 
00056 } /* namespace drizzled */