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Computing related timestamps by subtracting "N days" is sensitive to the prevailing timezone, since we interpret that as "same local time on the N'th prior day". Even though the intervals in question are only two to four days, through remarkable bad luck they managed to cross the end of Ramadan in 2014, causing the test's output to change if timezone is set to Africa/Casablanca. (Maybe in other Muslim areas as well; I didn't check.) There's absolutely no reason for this test to exercise interval subtraction, so just get rid of that and use plain timestamptz constants representing the intended values. Per report from Andres Freund. Back-patch to v10 where this test script came in. Discussion: https://postgr.es/m/20210930183641.7lh4jhvpipvromca@alap3.anarazel.de |
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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/.