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We had some pretty ad-hoc and inefficient code here. To make matters worse, it didn't test the properties of the random() function very thoroughly, and it had a test failure rate of one in every few tens of thousands of runs. Replace the script altogether with new test cases that prove much more about random()'s output, run faster, and can be calculated to have test failure rates on the order of 1e-9. Having done that, the failure rate of this script should be negligible in comparison to other causes of test failures, so remove the "ignore" marker for it in parallel_schedule. (If it does fail, we'd like to know about that, so "ignore" was always pretty counterproductive.) Tom Lane and Dean Rasheed Discussion: https://postgr.es/m/4173840.1673290336@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/.