Re: select query not using index - Mailing list pgsql-general

From A. Kretschmer
Subject Re: select query not using index
Date
Msg-id 20061202123220.GA31919@a-kretschmer.de
Whole thread Raw
In response to select query not using index  (<vivek@staff.ownmail.com>)
List pgsql-general
am  Sat, dem 02.12.2006, um 16:35:47 +0530 mailte vivek@staff.ownmail.com folgendes:
>
> The index was created before the table was populated. There are 3 rows
> in the table for 3 different users. Now when I do a

In this case, with only 3 rows, it is much cheaper to do a seq-scan
instead a index-scan, because a index-scan must read the index first and
then the table. And in your case, with only 3 rows, the engine needs
only one page to read.



Andreas
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Andreas Kretschmer
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