Horton

Fixes for ChangeVarNodes_walker()

Alexander Korotkov <akorotkov@postgresql.org>

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Commit: 2260c7f6d90ecf76d3806d32890a0890688b41e8
Author: Alexander Korotkov <akorotkov@postgresql.org>
Date: 2025-04-29T11:34:44Z
Releases: 18.0 
Fixes for ChangeVarNodes_walker()

This commit fixes two bug in ChangeVarNodes_walker() function.

 * When considering RestrictInfo, walk down to its clauses based on the
   presense of relid to be deleted not just in clause_relids but also in
   required_relids.

 * Incrementally adjust num_base_rels based on the change of clause_relids
   instead of recalculating it using clause_relids, which could contain
   outer-join relids.

Reported-by: Richard Guo <guofenglinux@gmail.com>
Discussion: https://postgr.es/m/CAMbWs49PE3CvnV8vrQ0Dr%3DHqgZZmX0tdNbzVNJxqc8yg-8kDQQ%40mail.gmail.com
Author: Andrei Lepikhov <lepihov@gmail.com>
Reviewed-by: Alexander Korotkov <aekorotkov@gmail.com>

Files

PathChange+/−
src/backend/rewrite/rewriteManip.c modified +24 −4
src/test/regress/expected/join.out modified +15 −1
src/test/regress/sql/join.sql modified +7 −1

Discussion