usual answer - use LEFT JOIN luke.
- [PERFORM] Performance regression 8.3.8 -> 8.4.1 wi... Wiktor Wodecki
- Re: [PERFORM] Performance regression 8.3.8 ->... Tom Lane
- Re: [PERFORM] Performance regression 8.3.8 ->... Grzegorz Jaśkiewicz
usual answer - use LEFT JOIN luke.