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Update FAQ.

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Bruce Momjian
2002-06-25 01:45:58 +00:00
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Frequently Asked Questions (FAQ) for PostgreSQL
Last updated: Sun Jun 23 17:16:13 EDT 2002
Last updated: Mon Jun 24 21:45:50 EDT 2002
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
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using an index with ORDER BY and LIMIT:
SELECT col
FROM tab
ORDER BY col
ORDER BY col [ DESC ]
LIMIT 1
When using wild-card operators such as LIKE or ~, indexes can only be
used if the beginning of the search is anchored to the start of the
string. Therefore, to use indexes, LIKE patterns must not start with
%, and ~(regular expression) patterns must start with ^.
used if the default C local is used during initdb and the beginning of
the search is anchored to the start of the string. Therefore, to use
indexes, LIKE patterns must not start with %, and ~(regular
expression) patterns must start with ^.
4.9) How do I see how the query optimizer is evaluating my query?