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Subject: Re: FW: Query length limitation in postgres server > 8.2.9
Date: Thu, 9 Jul 2009 11:20:27 -0700
Message-ID: <6B5AF6293A289F45826220B17ABE7937FDB1CC@BORON.aers.local>
In-Reply-To: <366642367C5B354197A1E0D27BC175BD02259883@KGHMAIL.KGH.ON.CA>
Thread-Topic: [SQL] FW: Query length limitation in postgres server > 8.2.9
Thread-Index: Acn/Toj3+uQvGLS7R4iTLUaooYhk/wAA2rGAAFrpBBAAAC4Z0AAA49pw
References: <6B5AF6293A289F45826220B17ABE7937FDB16C@BORON.aers.local>
	<6B5AF6293A289F45826220B17ABE7937FDB1C0@BORON.aers.local>
	<366642367C5B354197A1E0D27BC175BD02259883@KGHMAIL.KGH.ON.CA>
From: <jacob@aers.ca>
To: <Matthew.Hartman@krcc.on.ca>,
	<pgsql-sql@postgresql.org>

Being just the server admin I'll forward this thought on to the dev's
for consideration.

-----Original Message-----
From: Hartman, Matthew [mailto:Matthew.Hartman@krcc.on.ca]=20
Sent: Thursday, July 09, 2009 10:58 AM
To: Jacob Bresciani; pgsql-sql@postgresql.org
Subject: RE: [SQL] FW: Query length limitation in postgres server >
8.2.9

> From: pgsql-sql-owner@postgresql.org [mailto:pgsql-sql-
> owner@postgresql.org] On Behalf Of jacob@aers.ca
> Sent: Thursday, July 09, 2009 1:53 PM
>=20
> I've simplified the query to make it easier to look at.
>=20
> This one doesn't use the index's and therefore takes about 11713ms to
> return.

Have you considered joining two tables, one of which is a UNION ALL sum
of the identifiers?

For example:

Select *
From MyTable
Inner join (
   Select 12345 as MyColumn
   Union all select 45678
   Union all select 7890
) as MyCriteria on MyTable.MyColumn =3D MyCriteria.MyColumn;


Matthew Hartman
Programmer/Analyst
Information Management, ICP
Kingston General Hospital