Horton

Handle SubPlan cases in find_nonnullable_rels/vars.

Tom Lane <tgl@sss.pgh.pa.us>

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Commit: ff8fa0bf7eb9001f321c2af4bbe9c0f2bd5c1bf8
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2022-11-05T19:24:36Z
Releases: 16.0 
Handle SubPlan cases in find_nonnullable_rels/vars.

We can use some variants of SubPlan to deduce that Vars appearing
in the testexpr must be non-null.

Richard Guo

Discussion: https://postgr.es/m/CAMbWs4-jV=199A2Y_6==99dYnpnmaO_Wz_RGkRTTaCB=Pihw2w@mail.gmail.com

Files

PathChange+/−
src/backend/optimizer/util/clauses.c modified +34 −0
src/test/regress/expected/join.out modified +28 −0
src/test/regress/sql/join.sql modified +13 −0

Discussion