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Commit 7266d0997 added code to pull up simple constant function results, converting the RTE_FUNCTION RTE to a dummy RTE_RESULT RTE since it no longer need be scanned. But I forgot to clear the LATERAL flag if the RTE has it set. If the function reduced to a constant, it surely contains no lateral references so this simplification is logically OK. It's needed because various other places will Assert that RESULT RTEs aren't LATERAL. Per bug #17097 from Yaoguang Chen. Back-patch to v13 where the faulty code came in. Discussion: https://postgr.es/m/17097-3372ef9f798fc94f@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/.