Horton

pg_plan_advice: Don't generate FOREIGN_JOIN advice for a single relation.

Robert Haas <rhaas@postgresql.org>

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Commit: 89f5f860cc584cf4c531dbc38b614e4db5c61e24
Author: Robert Haas <rhaas@postgresql.org>
Date: 2026-07-02T20:13:18Z
Releases: 19 (unreleased) 
pg_plan_advice: Don't generate FOREIGN_JOIN advice for a single relation.

A foreign scan can target a single relation while still reaching the
fs_relids branch of pgpa_build_scan() -- for example, when postgres_fdw
pushes an aggregate down over one foreign table. In that case, no
advice should be emitted.

Author: Mahendra Singh Thalor <mahi6run@gmail.com>
Co-authored-by: Robert Haas <rhaas@postgresql.org>
Discussion: http://postgr.es/m/CAKYtNAofuAJBz6++SeikpCb=Y=MO1QgEuZNJ+KZOP2johF1r4Q@mail.gmail.com

Files

PathChange+/−
contrib/pg_plan_advice/Makefile modified +3 −1
contrib/pg_plan_advice/meson.build modified +5 −0
contrib/pg_plan_advice/pgpa_scan.c modified +6 −2
contrib/pg_plan_advice/t/001_foreign_scan.pl added +83 −0

Discussion