Question : convert an SQL 2005 Script into SQL 2000 (foreignkey)

i got following SQL 2005 script which not runs under SQL Server 2000 :-(

---- script -------------------------------------
IF NOT EXISTS (SELECT * FROM sys.foreign_keys WHERE object_id = OBJECT_ID(N'[dbo].[FK_users_users1]') AND parent_object_id = OBJECT_ID(N'[dbo].[machblog_user]'))
ALTER TABLE [dbo].[machblog_user]  WITH CHECK ADD  CONSTRAINT [FK_users_users1] FOREIGN KEY([modified_by_id])
REFERENCES [dbo].[machblog_user] ([user_id])
GO
---- script -------------------------------------

--- errorMsg ----------------------------------
Server: Msg 208, Level 16, State 1, Line 1
Invalid object name 'sys.foreign_keys'.
--- errorMsg ----------------------------------

I found that "sys.foreign_keys" sould be "sysforeignkeys", but that's not all of the Problem :-(

Answer : convert an SQL 2005 Script into SQL 2000 (foreignkey)

the sysforeignkeys has the following fields:
constid    fkeyid    rkeyid    fkey    rkey    keyno

so you have to use fkeyid instead of object_id and rkeyid instead of parent_object_id


IF NOT EXISTS (SELECT * FROM sys.foreign_keys WHERE fkeyid = OBJECT_ID(N'[dbo].[FK_users_users1]') AND rkeyid = OBJECT_ID(N'[dbo].[machblog_user]'))
ALTER TABLE [dbo].[machblog_user]  WITH CHECK ADD  CONSTRAINT [FK_users_users1] FOREIGN KEY([modified_by_id])
REFERENCES [dbo].[machblog_user] ([user_id])
GO