~drizzle-trunk/drizzle/development

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

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

 *

 *  Copyright (C) 2009 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

 */

#include <config.h>

#include <drizzled/natural_join_column.h>

#include <drizzled/table_list.h>

#include <drizzled/session.h>

#include <drizzled/sql_lex.h>

namespace drizzled {

Natural_join_column::Natural_join_column(Field *field_param,

                                         TableList *tab)

{

  assert(tab->table == field_param->getTable());

  table_field= field_param;

  table_ref= tab;

  is_common= false;

}

const char *Natural_join_column::name()

{

  return table_field->field_name;

}

Item *Natural_join_column::create_item(Session *session)

{

  return new Item_field(session, &session->lex().current_select->context, table_field);

}

Field *Natural_join_column::field()

{

  return table_field;

}

const char *Natural_join_column::table_name()

{

  assert(table_ref);

  return table_ref->alias;

}

const char *Natural_join_column::db_name()

{

  /*

    Test that TableList::db is the same as TableShare::db to

    ensure consistency. 

  */

  assert(!strcmp(table_ref->getSchemaName(), table_ref->table->getShare()->getSchemaName()));

  return table_ref->getSchemaName();

}

} /* namespace drizzled */