Re: Select with qualified join condition / Batch inserts

But he's testing with v8 beta3, so you'd expect the typecast problem not to appear?

Are all tables fully vacuumed? Should the statistics-target be raised for some columns, perhaps? What about the config
file?

--Tim

-----Original Message-----
From: pgsql-performance-owner@postgresql.org [mailto:pgsql-performance-owner@postgresql.org]On Behalf Of Matt Clark
Sent: Friday, October 15, 2004 12:37 PM
To: 'Bernd'; pgsql-performance@postgresql.org
Subject: Re: [PERFORM] Select with qualified join condition / Batch inserts


> SELECT cmp.WELL_INDEX, cmp.COMPOUND, con.CONCENTRATION
>     FROM SCR_WELL_COMPOUND cmp, SCR_WELL_CONCENTRATION con
>     WHERE cmp.BARCODE=con.BARCODE
>         AND cmp.WELL_INDEX=con.WELL_INDEX
>         AND cmp.MAT_ID=con.MAT_ID
>         AND cmp.MAT_ID = 3
>         AND cmp.BARCODE='910125864'
>         AND cmp.ID_LEVEL = 1;

Quick guess - type mismatch forcing sequential scan.  Try some quotes:
         AND cmp.MAT_ID = '3'
         AND cmp.BARCODE='910125864'
         AND cmp.ID_LEVEL = '1';

M


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