-- sql/create_deletelog.sql
-- This file is part of Decimail; see http://decimail.org
-- (C) 2004 Philip Endecott
 
-- 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; either version 2 of the License, or
-- any later version.
--
-- 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
drop table delete_log cascade;
drop function log_deleted_message() cascade;
drop trigger message_deleted on messages cascade;

begin;

create table delete_log (
	msg_id	integer
);

create function log_deleted_message() returns trigger as '
  begin
    insert into delete_log values (old.msg_id);
    notify delete_log;
    return old;
  end;
' language plpgsql;

create trigger message_deleted
	before delete on messages
	for each row
	execute procedure log_deleted_message();

end;
