diff --git a/doc/FAQ b/doc/FAQ index 15c5316bb8c5923d67eef310f5a5fede51832c15..78c113de9e0557f17ea974e15d792beba166e190 100644 --- a/doc/FAQ +++ b/doc/FAQ @@ -1,7 +1,7 @@ Frequently Asked Questions (FAQ) for PostgreSQL - Last updated: Sun Jan 12 13:36:11 EST 2003 + Last updated: Fri Jan 17 12:15:04 EST 2003 Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us) @@ -749,6 +749,10 @@ ORDER BY col [ DESC ] LIMIT 1; + If you believe the optimizer is incorrect in choosing a sequential + scan, use SET enable_seqscan TO 'off' and run tests to see if an index + scan is indeed faster. + When using wild-card operators such as LIKE or ~, indexes can only be used in certain circumstances: * The beginning of the search string must be anchored to the start