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Re: count * performance issue - Mailing list pgsql-performance

From A. Kretschmer
Subject Re: count * performance issue
Date
Msg-id 20080306065750.GD21084@a-kretschmer.de
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In response to count * performance issue  ("sathiya psql" <sathiya.psql@gmail.com>)
Responses Re: count * performance issue  ("sathiya psql" <sathiya.psql@gmail.com>)
Re: count * performance issue  (Mark Mielke <mark@mark.mielke.cc>)
List pgsql-performance
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am  Thu, dem 06.03.2008, um 12:17:55 +0530 mailte sathiya psql folgendes:
> TRIGGER i can use if i want the count of the whole table, but i require for
> some of the rows with WHERE condition....
>
> so how to do that ???

Okay, in this case a TRIGGER are a bad idea. You can use an INDEX on
this row. Can you show us the output for a EXPLAIN ANALYSE SELECT
count(*) from <your_table> WHERE <your_row> = ... ?


Andreas
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Andreas Kretschmer
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