Re: Cost-based optimizers

From: Rod Taylor <pg(at)rbt(dot)ca>
To: Martijn van Oosterhout <kleptog(at)svana(dot)org>
Cc: Christopher Kings-Lynne <chriskl(at)familyhealth(dot)com(dot)au>, Christopher Browne <cbbrowne(at)acm(dot)org>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Cost-based optimizers
Date: 2005-12-14 14:05:19
Message-ID: 1134569119.75120.58.camel@home
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> Ofcourse, this is another can of worms. To do this you would have to be
> able to have the failed query provide hints to the planner telling it
> where it went wrong. Now, it may be possible to provide (via
> post-mortem of an execution) a list of actual selectivites like:

Just being able to provide hints to go with EXPLAIN ANALYZE results
would be useful.

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