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This is intended for use mostly in test scripts for external tools, which could do without cross-PG-version variations in error message wording. Of course, the SQLSTATE isn't guaranteed stable either, but it should be more so than the error message text. Note: there's a bit of an ABI change for libpq here, but it seems OK because if somebody compiles against a newer version of libpq-fe.h, and then tries to pass PQERRORS_SQLSTATE to PQsetErrorVerbosity() of an older libpq library, it will be accepted and then act like PQERRORS_DEFAULT, thanks to the way the tests in pqBuildErrorMessage3 have historically been phrased. That seems acceptable. Didier Gautheron, reviewed by Dagfinn Ilmari Mannsåker Discussion: https://postgr.es/m/CAJRYxuKyj4zA+JGVrtx8OWAuBfE-_wN4sUMK4H49EuPed=mOBw@mail.gmail.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/.
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