From: Tom Lane <tgl@sss.pgh.pa.us>
To: Mario Splivalo <mario.splivalo@megafon.hr>
Cc: pgsql-performance@postgresql.org
Subject: Re: Query much slower when run from postgres function
Date: Mon, 09 Mar 2009 15:51:58 -0400
Message-ID: <14317.1236628318@sss.pgh.pa.us> (raw)
In-Reply-To: <49B56A3D.8000100@megafon.hr>
References: <49B51B60.6030600@megafon.hr>
<27649.1236616294@sss.pgh.pa.us>
<49B56A3D.8000100@megafon.hr>
Mario Splivalo <mario.splivalo@megafon.hr> writes:
> Is this difference normal?
It's hard to tell, because you aren't comparing apples to apples.
Try a prepared statement, like
prepare foo(int) as
SELECT
COUNT(*)::int4
FROM
_v1
WHERE
service_id = $1
;
execute foo(504);
which should produce results similar to the function. You could
then use "explain analyze execute" to probe further into what's
happening.
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, mario.splivalo@megafon.hr
Subject: Re: Query much slower when run from postgres function
In-Reply-To: <14317.1236628318@sss.pgh.pa.us>
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