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For its entire existence, isolationtester.c has forced client_min_messages to WARNING, but that seems like a very poor choice of test design. It should be up to individual test scripts to manage whether they emit notices and to ensure that the results are stable. (There were no NOTICE messages in the original set of isolation tests, so this was certainly dead code when committed, but perhaps it was needed at some earlier point.) It's possible that the original motivation was due to platform-dependent variations in the timing of stdout vs. stderr output. That should be moot since commits 73bcb76b7/6eda3e9c2, but just in case, adjust isotesterNoticeProcessor to print to stdout not stderr. (stderr seems like the wrong thing anyway: it should be for error printouts not expected test output.) Testing shows that the notices in insert-conflict-specconflict are indeed a bit timing-unstable on very slow machines, so hide them; maybe we can improve that later. Also, make the notices in plpgsql-toast a bit less verbose than the original code would've had them. Discussion: https://postgr.es/m/14616.1564251339@sss.pgh.pa.us
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/.