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Re: EOAndQualifier order

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Re: EOAndQualifier order

Subject: Re: EOAndQualifier order
From: Guido Neitzer <email@hidden>
Date: Thu, 12 Jul 2007 09:34:38 -0600

On 11.07.2007, at 15:29, Miguel Arroz wrote:

Is this normal? Is the order random? What's happening here? I'm asking this, because from what I understand form the PostgreSQL docs, the order of the stuff in ANDs (and ORs) may have cause a really big difference in performance when indexes (and multi- indexes) are envolved.

I can make big differences. I normally avoid multicolumn indexes in PostgreSQL as it can combine single column indexes quite efficiently.

So, I normally don't worry about that, only in really special cases.

Nevertheless: you could file a bug.

cug
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  >EOAndQualifier order (From: Miguel Arroz <email@hidden>)




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