Re: PERFORM statement inside procedure

"Rajat Katyal"  writes:
> checkPKSql := ''select * from "transform_customer_billing" ''; 
> checkPKSql := checkPKSql || '' where "inv_no" = '' || quote_literal(new=
> ."inv_no");
> PERFORM checkPKSql;

You seem to be confusing PERFORM with EXECUTE.  They are very different.
The above PERFORM is really equivalent to
	SELECT 'select ...';
which naturally yields a row containing a not-very-useful string value.

			regards, tom lane