048a9f113d
The buildfarm occasionally shows a variant row order in the output of this UPDATE ... RETURNING, implying that the preceding INSERT dropped one of the rows into some free space within the table rather than appending them all at the end. It's not entirely clear why that happens some times and not other times, but we have established that it's affected by concurrent activity in other databases of the cluster. In any case, the behavior is not wrong; the test is at fault for presuming that a seqscan will give deterministic row ordering. Add an ORDER BY atop the update to stop the buildfarm noise. The buildfarm seems to have shown this only in v18 and master branches, but just in case the cause is older, back-patch to all supported branches. Discussion: https://postgr.es/m/3866274.1770743162@sss.pgh.pa.us Backpatch-through: 14
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.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/17/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/17/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.