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/* -*- 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
*/
#ifndef DRIZZLED_FOREIGN_KEY_H
#define DRIZZLED_FOREIGN_KEY_H
#include <drizzled/memory/sql_alloc.h>
#include <drizzled/key.h>
#include <drizzled/key_part_spec.h>
#include <drizzled/sql_list.h>
#include <drizzled/cursor.h> /* for default_key_create_info */
#include <drizzled/message/table.pb.h>
namespace drizzled
{
class Item;
class Table_ident;
namespace memory { class Root; }
void add_foreign_key_to_table_message(
message::Table *table_message,
const char* fkey_name,
List<Key_part_spec> &cols,
Table_ident *table,
List<Key_part_spec> &ref_cols,
message::Table::ForeignKeyConstraint::ForeignKeyOption delete_opt_arg,
message::Table::ForeignKeyConstraint::ForeignKeyOption update_opt_arg,
message::Table::ForeignKeyConstraint::ForeignKeyMatchOption match_opt_arg);
class Foreign_key: public Key
{
public:
Table_ident *ref_table;
List<Key_part_spec> ref_columns;
message::Table::ForeignKeyConstraint::ForeignKeyOption delete_opt;
message::Table::ForeignKeyConstraint::ForeignKeyOption update_opt;
message::Table::ForeignKeyConstraint::ForeignKeyMatchOption match_opt;
Foreign_key(const LEX_STRING &name_arg,
List<Key_part_spec> &cols,
Table_ident *table,
List<Key_part_spec> &ref_cols,
message::Table::ForeignKeyConstraint::ForeignKeyOption delete_opt_arg,
message::Table::ForeignKeyConstraint::ForeignKeyOption update_opt_arg,
message::Table::ForeignKeyConstraint::ForeignKeyMatchOption match_opt_arg) :
Key(FOREIGN_KEY, name_arg, &default_key_create_info, 0, cols), ref_table(table),
ref_columns(ref_cols),
delete_opt(delete_opt_arg),
update_opt(update_opt_arg),
match_opt(match_opt_arg)
{ }
/**
* Constructs an (almost) deep copy of this foreign key. Only those
* elements that are known to never change are not copied.
* If out of memory, a partial copy is returned and an error is set
* in Session.
*/
Foreign_key(const Foreign_key &rhs, memory::Root *mem_root);
/**
* Used to make a clone of this object for ALTER/CREATE TABLE
*
* @see comment for Key_part_spec::clone
*/
virtual Key *clone(memory::Root *mem_root) const
{
return new (mem_root) Foreign_key(*this, mem_root);
}
/* Used to validate foreign key options */
bool validate(List<CreateField> &table_fields);
};
} /* namespace drizzled */
#endif /* DRIZZLED_FOREIGN_KEY_H */
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