~drizzle-trunk/drizzle/development

/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-

 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:

 *

 *  Copyright (C) 2008 Sun Microsystems, Inc.

 *

 *  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; version 2 of the License.

 *

 *  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

 */

#pragma once

#include <drizzled/lex_string.h>

#include <drizzled/memory/sql_alloc.h>

#include <drizzled/util/test.h>

namespace drizzled {

/* Structure for db & table in sql_yacc */

class Table_ident : public memory::SqlAlloc

{

public:

  lex_string_t db;

  str_ref table;

  Select_Lex_Unit *sel;

  Table_ident(lex_string_t db_arg, str_ref table_arg)

    : db(db_arg), table(table_arg), sel(NULL)

  {

  }

  explicit Table_ident(lex_string_t table_arg)

    : table(table_arg), sel(NULL)

  {

    db.assign(static_cast<const char*>(NULL), 0);

  }

  /*

    This constructor is used only for the case when we create a derived

    table. A derived table has no name and doesn't belong to any database.

    Later, if there was an alias specified for the table, it will be set

    by add_table_to_list.

  */

  explicit Table_ident(Select_Lex_Unit *s) : 

    table("*"), sel(s)

  {

    /* We must have a table name here as this is used with add_table_to_list */

    db.assign("", 0); // a subject to casedn_str

  }

  bool is_derived_table() const { return test(sel); }

};

} /* namespace drizzled */