On Tue, Feb 27, 2007 at 12:15:03PM +0100, Robert Partyka wrote: > Hi, > > I found PostgreSQL have strange behaviour with sub-select and pl/pgSQL, > see the case study at: > http://www.bobson.pl/pgsql/pgsql_sb1.html
The PostgreSQL optimiser is pretty smart and will pull up simple sub-selects like yours. If you put your subselect into a view, you'd also want the optimiser to find the optimal plan, right? If you want to stop it pulling up the subquery, you can add an OFFSET 0 or ORDER BY or anything that makes it a not-simple subquery. That tells the planner to leave it alone. Hope this helps, -- Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/ > From each according to his ability. To each according to his ability to > litigate.
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