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Fix HTML markup.

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Bruce Momjian
2006-04-13 12:20:36 +00:00
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Frequently Asked Questions (FAQ) for PostgreSQL
Last updated: Thu Apr 13 08:14:25 EDT 2006
Last updated: Thu Apr 13 08:20:04 EDT 2006
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
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Indexes are normally not used for ORDER BY or to perform joins. A
sequential scan followed by an explicit sort is usually faster than an
index scan of a large table.
However, LIMIT combined with ORDER BY often will use an index because
only a small portion of the table is returned.
index scan of a large table. However, LIMIT combined with ORDER BY
often will use an index because only a small portion of the table is
returned.
If you believe the optimizer is incorrect in choosing a sequential
scan, use SET enable_seqscan TO 'off' and run query again to see if an