From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
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To: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
Cc: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Deprecating Hash Indexes |
Date: | 2012-10-15 14:13:24 |
Message-ID: | CA+TgmoZ0A6EPU+M7vr52h1NOd8Rp8r7A61PNNsS6uEwoLAHAUw@mail.gmail.com |
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Lists: | pgsql-hackers |
On Sun, Oct 14, 2012 at 9:45 AM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
> * Put WARNINGs in the docs against the use of hash indexes, backpatch
> to 8.3. CREATE INDEX gives no warning currently, though Index Types
> does mention a caution.
I'd be in favor of adding such warnings to the documentation if they
are not there already, and possibly even warning on CREATE INDEX ..
USING hash(). I don't think I'd go so far as to say that we should
imply that they'll be removed in a future release. Given how deeply
intertwined they are with the planner, I doubt that that will happen;
and I think there is enough interest in the technology that it's
likely to eventually be fixed.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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