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 -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + As you are, so once was I. As I am, so you will be. + + Ancient Roman grave inscription + -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers