Drizzled Public API Documentation

statement.h
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 #pragma once
00022 
00023 #include <drizzled/definitions.h>
00024 #include <drizzled/error.h>
00025 #include <drizzled/sql_parse.h>
00026 #include <drizzled/sql_base.h>
00027 #include <drizzled/show.h>
00028 
00029 namespace drizzled {
00030 
00031 class Session;
00032 class TableList;
00033 class Item;
00034 
00035 namespace session { class Transactions; }
00036 
00037 namespace statement {
00038 
00043 class Statement
00044 {
00045 public:
00046   Statement(Session *in_session) :
00047     _session(*in_session)
00048   {}
00049 
00050   virtual ~Statement() {}
00051 
00052   void set_command(enum_sql_command);
00053   LEX& lex();
00054   session::Transactions& transaction();
00055 
00061   virtual bool execute()= 0;
00062 
00063   /* True if can be in transaction. Currently only DDL is not.
00064      This should go away when DDL commands are within transactions. */
00065   virtual bool isTransactional()
00066   {
00067     return false;
00068   }
00069 
00070   Session& session() const
00071   {
00072     return _session;
00073   }
00074 
00075   virtual bool isShow() { return false; }
00076 
00077 private:
00078   Session& _session;
00079 };
00080 
00081 } /* namespace statement */
00082 } /* namespace drizzled */
00083