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Changes made by commit 02ddd49 mean that dumps made against pre version 12 instances are no longer comparable with those made against version 12 or later instances. This makes cross-version upgrade testing fail in the buildfarm. Experimentation has shown that the error is cured if the dumps are made when extra_float_digits is set to 0. Hence this patch allows for it to be explicitly set rather than relying on pg_dump's builtin default (3 in almost all cases). This feature might have other uses, but should not normally be used. Discussion: https://postgr.es/m/c76f7051-8fd3-ec10-7579-1f8842305b85@2ndQuadrant.com
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/.