0ff8f521d4
When considering a partitioning parent rel, we should stop processing that subroot as soon as we've done adjust_appendrel_attrs and any securityQuals updates. The rest of this is unnecessary, and indeed adding duplicate subquery RTEs to the subroot is *wrong*. As the code stood, the children of that partition ended up with two sets of copied subquery RTEs, confusing matters greatly. Even more hilarity ensued if all of the children got excluded by constraint exclusion, so that the extra RTEs didn't make it back into the parent rtable. Per fuzz testing by Andreas Seltenreich. Back-patch to v11 where this got broken (by commit 0a480502b, it looks like). Discussion: https://postgr.es/m/87va8g7vq0.fsf@ansel.ydns.eu
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/.