Add index mention:
<P>In pre-8.0 releases, indexes often can not be used unless the data types exactly match the index's column types. This is particularly true of int2, int8, and numeric column indexes.</P>
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doc/FAQ
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doc/FAQ
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Frequently Asked Questions (FAQ) for PostgreSQL
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Frequently Asked Questions (FAQ) for PostgreSQL
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Last updated: Wed Aug 25 23:18:13 EDT 2004
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Last updated: Tue Aug 31 23:28:02 EDT 2004
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Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
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Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
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section 4.12.
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section 4.12.
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* The default C locale must be used during initdb.
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* The default C locale must be used during initdb.
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In pre-8.0 releases, indexes often can not be used unless the data
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types exactly match the index's column types. This is particularly
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true of int2, int8, and numeric column indexes.
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4.9) How do I see how the query optimizer is evaluating my query?
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4.9) How do I see how the query optimizer is evaluating my query?
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See the EXPLAIN manual page.
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See the EXPLAIN manual page.
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alink="#0000ff">
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alink="#0000ff">
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<H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1>
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<H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1>
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<P>Last updated: Wed Aug 25 23:18:13 EDT 2004</P>
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<P>Last updated: Tue Aug 31 23:28:02 EDT 2004</P>
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<P>Current maintainer: Bruce Momjian (<A href=
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<P>Current maintainer: Bruce Momjian (<A href=
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"mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)<BR>
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"mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)<BR>
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</UL>
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</UL>
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<P>
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<P>
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<P>In pre-8.0 releases, indexes often can not be used unless the data
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types exactly match the index's column types. This is particularly
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true of int2, int8, and numeric column indexes.</P>
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<H4><A name="4.9">4.9</A>) How do I see how the query optimizer is
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<H4><A name="4.9">4.9</A>) How do I see how the query optimizer is
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evaluating my query?</H4>
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evaluating my query?</H4>
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