Re: A question on the query planner

On Mon, 2003-12-01 at 16:44, Jared Carr wrote:
> I am currently working on optimizing some fairly time consuming queries
> on a decently large
> dataset.
>
> The Following is the query in question.
>
> SELECT z.lat, z.lon, z.city, z.state, q.date_time, c.make, c.model, c.year
> FROM quotes AS q, zips AS z, cars AS c
> WHERE
> z.zip = q.zip AND
> c.car_id = q.car_id AND
> z.state != 'AA' AND
> z.state != 'AE' AND
> z.state != 'AP' AND
> z.state = 'WA'
> ORDER BY date_time;
>

This wont completely solve your problem, but z.state = 'WA' would seem
to be mutually exclusive of the != AA|AE|AP. While it's not much, it is
extra overhead there doesn't seem to be any need for...

Robert Treat
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