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The wording changed here comes from 991bfe11d28a, when the only way to trigger a promotion was with a trigger file. There are more options to achieve this operation these days, like the SQL function pg_promote() or the command `pg_ctl promote`, so it is confusing to assume that only a trigger file is able to do the work. Note also that promote_trigger_file has been removed as of cd4329d9393f in 16~. Author: Shinya Kato Discussion: https://postgr.es/m/201b08ea29aa61f96162080e75be503c@oss.nttdata.com Backpatch-through: 12
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. 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, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.