dc686681e0
"jsonlog" is a new value that can be added to log_destination to provide logs in the JSON format, with its output written to a file, making it the third type of destination of this kind, after "stderr" and "csvlog". The format is convenient to feed logs to other applications. There is also a plugin external to core that provided this feature using the hook in elog.c, but this had to overwrite the output of "stderr" to work, so being able to do both at the same time was not possible. The files generated by this log format are suffixed with ".json", and use the same rotation policies as the other two formats depending on the backend configuration. This takes advantage of the refactoring work done previously in ac7c807, bed6ed3, 8b76f89 and 2d77d83 for the backend parts, and 72b76f7 for the TAP tests, making the addition of any new file-based format rather straight-forward. The documentation is updated to list all the keys and the values that can exist in this new format. pg_current_logfile() also required a refresh for the new option. Author: Sehrope Sarkuni, Michael Paquier Reviewed-by: Nathan Bossart, Justin Pryzby Discussion: https://postgr.es/m/CAH7T-aqswBM6JWe4pDehi1uOiufqe06DJWaU5=X7dDLyqUExHg@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/.