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build_child_join_sjinfo creates a derived SpecialJoinInfo in the short-lived GEQO context, but afterwards the semi_rhs_exprs from that may be used in a UniquePath for a child base relation. This breaks the expectation that all base-relation-level structures are in the planning-lifespan context, leading to use of a dangling pointer with probable ensuing crash later on in create_unique_plan. To fix, copy the expression trees when making a UniquePath. Per bug #18360 from Alexander Lakhin. This has been broken since partitionwise joins were added, so back-patch to all supported branches. Discussion: https://postgr.es/m/18360-a23caf3157f34e62@postgresql.org
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/devel/ In particular, information about building PostgreSQL from the source code can be found at: https://www.postgresql.org/docs/devel/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/.