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plpgsql's function exec_move_row() handles assignment of a composite source value to either a PLpgSQL_rec or PLpgSQL_row target variable. Oddly, rather than taking a single target argument which it could do run-time type detection on, it was coded to take two separate arguments (only one of which is allowed to be non-NULL). This choice had then back-propagated into storing two separate target variables in various plpgsql statement nodes, with lots of duplicative coding and awkward interface logic to support that. Simplify matters by folding those pairs down to single variables, distinguishing the two cases only where we must ... which turns out to be only in exec_move_row itself. This is purely refactoring and should not change any behavior. In passing, remove unused field PLpgSQL_stmt_open.returntype. Discussion: https://postgr.es/m/11787.1512713374@sss.pgh.pa.us
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/.