Drizzled Public API Documentation

drop_schema.cc
00001 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
00002  *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
00003  *
00004  *  Copyright (C) 2009 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; either version 2 of the License, or
00009  *  (at your option) any later version.
00010  *
00011  *  This program is distributed in the hope that it will be useful,
00012  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  *  GNU General Public License for more details.
00015  *
00016  *  You should have received a copy of the GNU General Public License
00017  *  along with this program; if not, write to the Free Software
00018  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00019  */
00020 
00021 #include <config.h>
00022 
00023 #include <drizzled/show.h>
00024 #include <drizzled/session.h>
00025 #include <drizzled/statement/drop_schema.h>
00026 #include <drizzled/plugin/event_observer.h>
00027 #include <drizzled/sql_lex.h>
00028 #include <drizzled/schema.h>
00029 
00030 #include <string>
00031 
00032 using namespace std;
00033 
00034 namespace drizzled
00035 {
00036 
00037 bool statement::DropSchema::execute()
00038 {
00039   if (session().inTransaction())
00040   {
00041     my_error(ER_TRANSACTIONAL_DDL_NOT_SUPPORTED, MYF(0));
00042     return true;
00043   }
00044 
00045   identifier::Schema schema_identifier(std::string(lex().name.str, lex().name.length));
00046 
00047   if (not schema::check(session(), schema_identifier))
00048   {
00049     my_error(ER_WRONG_DB_NAME, schema_identifier);
00050 
00051     return false;
00052   }
00053 
00054   if (session().inTransaction())
00055   {
00056     my_message(ER_LOCK_OR_ACTIVE_TRANSACTION, 
00057         ER(ER_LOCK_OR_ACTIVE_TRANSACTION), 
00058         MYF(0));
00059     return true;
00060   }
00061   
00062   bool res = true;
00063   std::string path;
00064   schema_identifier.getSQLPath(path);
00065   if (unlikely(plugin::EventObserver::beforeDropDatabase(session(), path))) 
00066   {
00067     my_error(ER_EVENT_OBSERVER_PLUGIN, schema_identifier);
00068   }
00069   else
00070   {
00071     res= schema::drop(session(), schema_identifier, drop_if_exists);
00072     if (unlikely(plugin::EventObserver::afterDropDatabase(session(), path, res)))
00073     {
00074       my_error(ER_EVENT_OBSERVER_PLUGIN, MYF(0), path.c_str());
00075       res = false;
00076     }
00077 
00078   }
00079 
00080   return res;
00081 }
00082 
00083 } /* namespace drizzled */
00084