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When dealing with ResultRelInfos for partitions, there are cases where there are mixed requirements for the ri_RootResultRelInfo. There are cases when the partition itself requires a NULL ri_RootResultRelInfo and in the same query, the same partition may require a ResultRelInfo with its parent set in ri_RootResultRelInfo. This could cause the column mapping between the partitioned table and the partition not to be done which could result in crashes if the column attnums didn't match exactly. The fix is simple. We now check that the ri_RootResultRelInfo matches what the caller passed to ExecGetTriggerResultRel() and only return a cached ResultRelInfo when the ri_RootResultRelInfo matches what the caller wants, otherwise we'll make a new one. Author: David Rowley <dgrowleyml@gmail.com> Author: Amit Langote <amitlangote09@gmail.com> Reported-by: Dmitry Fomin <fomin.list@gmail.com> Discussion: https://postgr.es/m/7DCE78D7-0520-4207-822B-92F60AEA14B4@gmail.com Backpatch-through: 15
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/.