Re: multivariate statistics (v25)

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: David Rowley <david(dot)rowley(at)2ndquadrant(dot)com>
Cc: Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Kyotaro HORIGUCHI <horiguchi(dot)kyotaro(at)lab(dot)ntt(dot)co(dot)jp>, David Fetter <david(at)fetter(dot)org>, dean(dot)a(dot)rasheed(at)gmail(dot)com, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: multivariate statistics (v25)
Date: 2017-03-15 20:45:18
Message-ID: 20170315204518.ym2ljmj62h5nbw3a@alvherre.pgsql
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Here's another version of 0002 after cleaning up almost everything from
David's review. I also added tests for ALTER STATISTICS in
sql/alter_generic.sql which made me realize there were three crasher bug
in here; fixed all those. It also made me realize that psql's \d was a
little bit too generous with dropped columns in a stats object. That
should all behave better now.

One thing I didn't do was change StatisticExtInfo to use a bitmapset
instead of int2vector. I think it's a good idea to do so.

I'll go rebase the followup patches now.

--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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stats-ext-shared-infra-27.patch text/plain 146.5 KB

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