d16ebfbff7
If autovacuum comes along just after we fill table test_seg with some data, it will update the stats to the point where we prefer a plain indexscan over a bitmap scan, breaking the expected output (as well as the point of the test case). To fix, just force a bitmap scan to be chosen here. This has evidently been wrong since commit de1d042f5. It's not clear why we just recently saw any buildfarm failures due to it; but prairiedog has failed twice on this test in the past week. Hence, backpatch to v11 where this test case came in.
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/.