Horton

Use multi-variate MCV lists to estimate ScalarArrayOpExpr

Tomas Vondra <tomas.vondra@postgresql.org>

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Commit: e83daa7e331e0718bb254ab685f2ed95df423554
Author: Tomas Vondra <tomas.vondra@postgresql.org>
Date: 2020-03-14T15:13:00Z
Releases: 13.0 
Use multi-variate MCV lists to estimate ScalarArrayOpExpr

Commit 8f321bd16c added support for estimating ScalarArrayOpExpr clauses
(IN/ANY) clauses using functional dependencies. There's no good reason
not to support estimation of these clauses using multi-variate MCV lists
too, so this commits implements that. That makes the behavior consistent
and MCV lists can estimate all variants (ANY/ALL, inequalities, ...).

Author: Tomas Vondra
Review: Dean Rasheed
Discussion: https://www.postgresql.org/message-id/flat/13902317.Eha0YfKkKy%40pierred-pdoc

Files

PathChange+/−
src/backend/statistics/extended_stats.c modified +61 −5
src/backend/statistics/mcv.c modified +109 −2
src/include/statistics/extended_stats_internal.h modified +2 −2
src/test/regress/expected/stats_ext.out modified +60 −0
src/test/regress/sql/stats_ext.sql modified +20 −0

Discussion