I received this tip in a PL/SQL class. On large table you can use count(1)
to force use of the index. I have not verified this but it may help.
>From: Jordi Adame V <jordi_at_inffinix.com>
>Reply-To: oracle-l_at_freelists.org
>To: Oracle-L_at_freelists.org
>Subject: Dead slow count(*)
>Date: Thu, 29 Jan 2004 17:54:46 -0600
>
>Hi!
>
>I have this table with ~4,000,000 entries
>
>When i do a SELECT COUNT(*) FROM TABLE_NAME
>
>it takes 4 hours to give me the result, this is way too much
>
>Im running Oracle 9.2.0.4.0 on RedHat AS 3
>
>These are my first experiences with Oracle, so I have no clue how to fix
>this
>query time... Any help would be nice
>
>regards
>
>Jordi
>
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Received on Mon Feb 09 2004 - 12:16:11 CST
