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From: MirrorX <mirrorx@gmail.com>
To: pgsql-performance@postgresql.org
Subject: Re: cannot use multicolumn index
Date: Wed, 14 Sep 2011 06:09:13 -0700 (PDT)
Message-ID: <1316005753084-4802699.post@n5.nabble.com> (raw)
In-Reply-To: <1316004607207-4802634.post@n5.nabble.com>
References: <1316004607207-4802634.post@n5.nabble.com>

here is the explain analyze output->
server=# explain analyze select count(*) from temp_by_hour where xid > 100
and xdate > now() - interval '1 week';
                                                                    QUERY
PLAN                                                                     
---------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=29359311.58..29359311.59 rows=1 width=0) (actual
time=2728061.589..2728061.590 rows=1 loops=1)
   ->  Seq Scan on temp_by_hour (cost=0.00..29345234.14 rows=5630975
width=0) (actual time=560446.661..2726838.501 rows=5760724 loops=1)
         Filter: ((xid > 100) AND (xdate > (now() - '7 days'::interval)))
 Total runtime: 2728063.170 ms

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