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In order for this to work, walsenders need the optional ability to connect to a database, so the "replication" keyword now allows true or false, for backward-compatibility, and the new value "database" (which causes the "dbname" parameter to be respected). walsender needs to loop not only when idle but also when sending decoded data to the user and when waiting for more xlog data to decode. This means that there are now three separate loops inside walsender.c; although some refactoring has been done here, this is still a bit ugly. Andres Freund, with contributions from Álvaro Herrera, and further review by me.
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: http://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 http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.