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Re: Optimizer internals

From: "John Vincent" <lusis(dot)org(at)gmail(dot)com>
To: "Mark Lewis" <mark(dot)lewis(at)mir3(dot)com>
Cc: "PGSQL Performance" <pgsql-performance(at)postgresql(dot)org>
Subject: Re: Optimizer internals
Date: 2006-06-15 19:38:32
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
Any suggestions? FYI the original question wasn't meant as a poke at
> comparing PG to MySQL to DB2. I'm not making an yvalue judgements either
> way. I'm just trying to understand how we can use it the best way possible.

Actually we just thought about something. With PG, we can create an index
that is a SUM of the column where indexing, no? We're going to test this in
a few hours. Would that be able to be satisfied by an index scan?

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