18105e6db5
Commit9a60f295bstripped the stale PlaceHolderVars left behind by left-join removal from the surviving rels' baserestrictinfo and from EquivalenceClass member expressions, but it overlooked join clauses. A PlaceHolderVar embedded in a join clause can likewise retain the removed rel and join in its phrels, since remove_rel_from_query() fixes up the RestrictInfo's own relid sets but not the PHVs inside its expression. As before, this is normally harmless, because later processing consults those relid sets rather than the embedded PHVs. However, a restriction clause derived from such an OR join clause inherits the stale PlaceHolderVar, and when the derived clause is translated for an appendrel child, pull_varnos() recomputes its relids and folds the removed relation back in. The rebuilt clause then references a no-longer-existent relation, tripping an assertion during path generation. Fix by also stripping the removed relation from the PlaceHolderVars in the surviving rels' join clauses, including the sub-clauses of any OR clause. Like9a60f295b, this is only reachable on v18 and later, where match_index_to_operand() began ignoring PlaceHolderVars. Author: Arne Roland <arne.roland@malkut.net> Reviewed-by: Tender Wang <tndrwang@gmail.com> Reviewed-by: Richard Guo <guofenglinux@gmail.com> Discussion: https://postgr.es/m/27a44087-3d65-473e-8d88-7c12228e0d7e@malkut.net Backpatch-through: 18
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/18/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/18/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.