Hi, Attached is an updated version of the patch, fixing some minor bitrot and duplicate OIDs.
Sadly, this patch series does not seem to move forward very much, and I'm not sure how to change that :-/ But I'd like to point out that while those new statistics are still per-table, we might use them to improve join estimates (which is kinda the elephant in the room, when it comes to estimates) similarly to what eqjoinsel() does with per-column stats. regards -- Tomas Vondra http://www.2ndQuadrant.com PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
0001-Keep-information-about-already-estimated-cl-20180224.patch.gz
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0002-multivariate-MCV-lists-20180224.patch.gz
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0003-multivariate-histograms-20180224.patch.gz
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