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A ConvertRowtypeExpr is used to translate a whole-row reference of a child to that of a parent. The planner produces nested ConvertRowtypeExpr while translating whole-row reference of a leaf partition in a multi-level partition hierarchy. Executor then translates the whole-row reference from the leaf partition into all the intermediate parent's whole-row references before arriving at the final whole-row reference. It could instead translate the whole-row reference from the leaf partition directly to the top-most parent's whole-row reference skipping any intermediate translations. Ashutosh Bapat, with tests by Kyotaro Horiguchi and some editorialization by me. Reviewed by Andres Freund, Pavel Stehule, Kyotaro Horiguchi, Dmitry Dolgov, Tom Lane.
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/.