Re: Getting query plan alternatives from query planner?

From: Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>
To: Stefan Keller <sfkeller(at)gmail(dot)com>, Craig James <cjames(at)emolecules(dot)com>
Cc: "pgsql-performance(at)postgresql(dot)org" <pgsql-performance(at)postgresql(dot)org>
Subject: Re: Getting query plan alternatives from query planner?
Date: 2014-04-14 19:18:46
Message-ID: 534C3496.5000409@vmware.com
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On 04/14/2014 09:36 PM, Stefan Keller wrote:
> Who's the elephant in the room who is reluctant to introduce explicit hints?

Please read some of the previous discussions on this. Like this, in this
very same thread:

http://www.postgresql.org/message-id/15381.1395410811@sss.pgh.pa.us

I'd like to have explicit hints, *of the kind explained in that
message*. Hints that tell the planner what the data distribution is
like. Hints to override statistics and heuristics used by the planner.

- Heikki

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