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Update FAQ.

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Bruce Momjian
2001-05-30 22:58:00 +00:00
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Frequently Asked Questions (FAQ) for PostgreSQL
Last updated: Tue May 22 17:50:25 EDT 2001
Last updated: Wed May 30 18:57:52 EDT 2001
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
@ -709,9 +709,9 @@ Maximum number of indexes on a table? unlimited
column statistics on its own, so VACUUM ANALYZE must be run to collect
them periodically.
Indexes are usually not used for ORDER BY operations: a sequential
scan followed by an explicit sort is faster than an indexscan of all
tuples of a large table, because it takes fewer disk accesses.
Indexes are usually not used for ORDER BY or joins: a sequential scan
followed by an explicit sort is faster than an indexscan of all tuples
of a large table, because it takes fewer disk accesses.
When using wild-card operators such as LIKE or ~, indices can only be
used if the beginning of the search is anchored to the start of the