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The relation creation is done at executor startup, however the main regression test suite is lacking scenarios where no data is inserted which is something that can happen when using EXECUTE or EXPLAIN with CREATE TABLE AS and WITH NO DATA. Some patches are worked on to reshape the way CTAS relations are created, so this makes sure that we do not miss some query patterns already supported. Reported-by: Andreas Karlsson Author: Michael Paquier Reviewed-by: Andreas Karlsson Discussion: https://postgr.es/m/20190206091817.GB14980@paquier.xyz
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/.