Multivariate statistics and expression indexes

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Multivariate statistics and expression indexes
Date: 2017-02-20 23:13:21
Message-ID: 20170220231321.GE2672@momjian.us
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At the risk of asking a stupid question, we already have optimizer
statistics on expression indexes. In what sense are we using this for
multi-variate statistics, and in what sense can't we.

FYI, I just wrote a blog post about expression index statistics:

http://momjian.us/main/blogs/pgblog/2017.html#February_20_2017

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Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ As you are, so once was I. As I am, so you will be. +
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