Re: Seq. scan when using comparison operators, why? [netaktiv.com #150]

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От Stephane Bortzmeyer
Тема Re: Seq. scan when using comparison operators, why? [netaktiv.com #150]
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Msg-id 20020408141902.GA12745@staff.netaktiv.com
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Ответ на Re: Seq. scan when using comparison operators, why? [netaktiv.com #150]  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: Seq. scan when using comparison operators, why? [netaktiv.com #150]  (Tom Lane <tgl@sss.pgh.pa.us>)
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On Mon, Apr 08, 2002 at 10:15:05AM -0400,
 Tom Lane <tgl@sss.pgh.pa.us> wrote
 a message of 13 lines which said:

> That is the default behavior in the absence of any VACUUM ANALYZE
...
> An indexscan is generally not a win for scanning more than a few
> percent of a table.

You're right, after the VACUUM ANALYZE, both queries use sequential
scan :-)


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