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This code missed the need to update the combined state's nullbitmap if state1 already had a bitmap but state2 didn't. We need to extend the existing bitmap with 1's but didn't. This could result in wrong output from a parallelized array_agg(anyarray) calculation, if the input has a mix of null and non-null elements. The errors depended on timing of the parallel workers, and therefore would vary from one run to another. Also install guards against integer overflow when calculating the combined object's sizes, and make some trivial cosmetic improvements. Author: Dmytro Astapov <dastapov@gmail.com> Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/CAFQUnFj2pQ1HbGp69+w2fKqARSfGhAi9UOb+JjyExp7kx3gsqA@mail.gmail.com Backpatch-through: 16 |
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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/.