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Expose the standard error functions as SQL-callable functions. These are expected to be useful to people working with normal distributions, and we use them here to test the distribution from random_normal(). Since these functions are defined in the POSIX and C99 standards, they should in theory be available on all supported platforms. If that turns out not to be the case, more work will be needed. On all platforms tested so far, using extra_float_digits = -1 in the regression tests is sufficient to allow for variations between implementations. However, past experience has shown that there are almost certainly going to be additional unexpected portability issues, so these tests may well need further adjustments, based on the buildfarm results. Dean Rasheed, reviewed by Nathan Bossart and Thomas Munro. Discussion: https://postgr.es/m/CAEZATCXv5fi7+Vu-POiyai+ucF95+YMcCMafxV+eZuN1B-=MkQ@mail.gmail.com |
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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/.