From: "Igor Kryltsov" <kryltsov@yahoo.com>
Subject: Postgresql FK to MS SQL triggers
Date: Mon, 28 Feb 2005 16:46:55 +1100
Organization: Hub.Org Networking Services
Lines: 34
Message-ID: <cvub0o$1sll$2@news.hub.org>
To: pgsql-sql@postgresql.org

Hi,


If you are moving from Postgres to MS SQL you will most likely will find
that you can not recreate your PostgreSQL FK to MSSQL FK because this
enterprise class database will NOT allow you to create all 3 FK which are
exist in your PGSQL:

table users(user_id PK)

table journal(created_by, modified_by, deleted_by)

ADD CONSTRAINT fk_created_by FOREIGN KEY (created_by) REFERENCES
users(user_id) MATCH FULL ON UPDATE
 CASCADE ON DELETE CASCADE;
ADD CONSTRAINT fk_modified_by FOREIGN KEY (modified_by) REFERENCES
users(user_id) MATCH FULL ON UPDATE
 CASCADE ON DELETE CASCADE;
ADD CONSTRAINT fk_deleted_by FOREIGN KEY (deleted_by) REFERENCES
users(user_id) MATCH FULL ON UPDATE
 CASCADE ON DELETE CASCADE;


For interested people I wrote a PHP script which:
1) Extracts all underlying triggers from pg_trigger table  in Postgres used
to support FK (3 triggers for each FK)
2) Generates a MSSQL script file which recreates all triggers in MSSQL

Hope it will save some time for somebody.

Igor