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We should run the expression subtrees of PartitionedRelPruneInfo structs through fix_scan_expr. Failure to do so means that AlternativeSubPlans within those expressions won't be cleaned up properly, resulting in "unrecognized node type" errors since v14. It seems fairly likely that at least some of the other steps done by fix_scan_expr are important here as well, resulting in as-yet- undetected bugs. Therefore, I've chosen to back-patch this to all supported branches including v13, even though the known symptom doesn't manifest in v13. Per bug #18778 from Alexander Lakhin. Discussion: https://postgr.es/m/18778-24cd399df6c806af@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. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.