1. 2014-11-24 Re: [PERFORM] Why don't use index on x when ORDER BY pgsql-per Tom Lane 2. 2014-11-24 Re: [PERFORM] Why don't use index on x when ORDER BY pgsql-per Robert Klemme 3. 2014-11-24 [PERFORM] Why don't use index on x when ORDER BY x, y pgsql-per Vlad Arkhipov