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If the first transaction block in these tests were entered exactly at midnight (California time), they'd report a bogus failure due to 'now' and 'midnight' having the same values. Commit 8c2ac75c5 had dismissed this as being of negligible probability, but we've now seen it happen in the buildfarm, so let's prevent it. We can get pretty much the same test coverage without an it's-not-midnight assumption by moving the does-'now'-work cases into their own test step. While here, apply commit 47169c255's s/DELETE/TRUNCATE/ change to timestamptz as well as timestamp (not sure why that didn't occur to me at the time; the risk of failure is the same). Back-patch to all supported branches, since the main point is to get rid of potential buildfarm failures. Discussion: https://postgr.es/m/14821.1577031117@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/.