Обсуждение: ONLY in queries by RI triggers

On 2015-04-17 17:35:16 +0300, Vladimir Borodin wrote:
> A long time ago in 04b31609b63ce77fb9273193f07cf21b2a7176af ONLY
> keyword was added to all queries in
> src/backend/utils/adt/ri_triggers.c. Since that time foreign keys do
> not work with inheritance trees and it is mentioned in the
> documentation for all versions since at least 7.3.
> 
> I wonder what are the pitfalls of removing ONLY keyword from those
> queries? I have made such change, it passes all tests and foreign keys
> for partitioned tables do work, but I suppose that there are lots of
> places where it could break something.

Unique keys don't work across partitions and they fk triggers rely on
one side being unique...

Greetings,

Andres Freund