From: | Tomasz Myrta <jasiek(at)klaster(dot)net> |
---|---|
To: | Adrian Demaestri <ademaestri(at)yahoo(dot)com> |
Cc: | pgsql-performance(at)postgresql(dot)org |
Subject: | Re: planner doesn't use multicolumn index |
Date: | 2003-10-08 14:18:23 |
Message-ID: | 3F841CAF.6070202@klaster.net |
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Thread: | |
Lists: | pgsql-performance |
> We've a table with about 8 million rows, and we need to get rows by the
> value of two of its fields( the type of the fields are int2 and int4,
> the where condition is v.g. partido=99 and partida=123). We created a
> multicolumn index on that fields but the planner doesn't use it, it
> still use a seqscan. That fields are primary key of the table and we
> clusterded the table based on that index, but it still doesn't work. We
> also set the enviroment variable enable_seqscan to false and nathing
> happends. The only way the planner use it is in querys that order by the
> expression of the index.
> Any idea?
> thanks.
> Adrián
where partido=99::int2 and partida=123;
Regards,
Tomasz Myrta
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