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Previously, if one background worker registered another background worker and set bgw_notify_pid while for the second background worker, it would not receive notifications from the postmaster unless, at the time the "parent" was registered, BGWORKER_BACKEND_DATABASE_CONNECTION was set. To fix, instead instead of including only those background workers that requested database connections in the postmater's BackendList, include them all. There doesn't seem to be any reason not do this, and indeed it removes a significant amount of duplicated code. The other option is to make PostmasterMarkPIDForWorkerNotify look at BackgroundWorkerList in addition to BackendList, but that adds more code duplication instead of getting rid of it. Patch by me. Review and testing by Ashutosh Bapat. |
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README.git |
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/.