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Here we adjust the EXPLAIN ANALYZE output for Result Cache so that we don't show any Result Cache stats for parallel workers who don't contribute anything to Result Cache plan nodes. I originally had ideas that workers who don't help could still have their Result Cache stats displayed. The idea with that was so that I could write some parallel Result Cache regression tests that show the EXPLAIN ANALYZE output. However, I realized a little too late that such tests would just not be possible to have run in a stable way on the buildfarm. With that knowledge, before 9eacee2e6 went in, I had removed all of the tests that were showing the EXPLAIN ANALYZE output of a parallel Result Cache plan, however, I forgot to put back the code that adjusts the EXPLAIN output to hide the Result Cache stats for parallel workers who were not fast enough to help out before query execution was over. All other nodes behave this way and so should Result Cache. Additionally, with this change, it now seems safe enough to remove the SET force_parallel_mode = off that I had added to the regression tests. Also, perform some cleanup in the partition_prune tests. I had adjusted the explain_parallel_append() function to sanitize the Result Cache EXPLAIN ANALYZE output. However, since I didn't actually include any parallel Result Cache tests that show their EXPLAIN ANALYZE output, that code does nothing and can be removed. In passing, move the setting of memPeakKb into the scope where it's used. Reported-by: Amit Khandekar Author: David Rowley, Amit Khandekar Discussion: https://postgr.es/m/CAJ3gD9d8SkfY95GpM1zmsOtX2-Ogx5q-WLsf8f0ykEb0hCRK3w@mail.gmail.com
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/.