Re: Transform_Null_Equals does not work in Functions

Daniel Schuchardt <d.schuchardt@prodat-sql.de> writes:
> CREATE OR REPLACE FUNCTION show_transform_problem(with_transform BOOL)
> RETURNS BOOL AS $$
> DECLARE result BOOL;
> BEGIN
>   IF with_transform THEN
>       SET transform_null_equals TO ON;
>   END IF;
>   RESULT:=NULL=1;
>   SET transform_null_equals TO OFF;
>   RETURN result;
> END $$ LANGUAGE plpgsql;

That isn't going to work unless you EXECUTE the target statement, so
that it's re-parsed from scratch every time.

It's highly unlikely that transform_null_equals will solve your problem
anyway.  Find a more standards-compliant way.

            regards, tom lane