From: CS DBA <cs_dba@consistentstate.com>
To: pgsql-performance@postgresql.org
Subject: Problem query
Date: Wed, 01 Jun 2011 14:14:10 -0600
Message-ID: <4DE69D92.5040407@consistentstate.com> (raw)
Hi All;
We have a table with approx 200 columns. about a dozen columns are text
data types and the rest are a mix of integers , bigint's and double
precision types.
The table has about 25million rows.
The app wants to run a query like this:
select count(pri_num) from max_xtrv_st_t
where pri_num in (select max(pri_num) from max_xtrv_st_t where 1=1
group by tds_cx_ind, cxs_ind_2 )
I've tried to split the query up but made little progress, pri_num and
tds_cx_ind are bigint's and cxs_ind_2 is an integer
The table has an index on all 3 columns (3 separate indexes)
Anyone have any thoughts on tuning this query?
--
---------------------------------------------
Kevin Kempter - Constent State
A PostgreSQL Professional Services Company
www.consistentstate.com
---------------------------------------------
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To: pgsql-performance@postgresql.org
Cc: cs_dba@consistentstate.com
Subject: Re: Problem query
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