mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-12-15 08:20:16 +08:00
bf740ce9e5
Previously, GetBackgroundWorkerPid() would return BGWH_NOT_YET_STARTED if the slot used for the worker registration had not been reused by unrelated activity, and BGWH_STOPPED if it had. Either way, a process that had requested notification when the state of one of its background workers changed did not receive such notifications. Fix things so that GetBackgroundWorkerPid() always returns BGWH_STOPPED in this situation, so that we do not erroneously give waiters the impression that the worker will eventually be started; and send notifications just as we would if the process terminated after having been started, so that it's possible to wait for the postmaster to process a worker termination request without polling. Discovered by Amit Kapila during testing of parallel sequential scan. Analysis and fix by me. Back-patch to 9.4; there may not be anyone relying on this interface yet, but if anyone is, the new behavior is a clear improvement. |
||
|---|---|---|
| config | ||
| contrib | ||
| doc | ||
| src | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| aclocal.m4 | ||
| configure | ||
| configure.in | ||
| COPYRIGHT | ||
| GNUmakefile.in | ||
| HISTORY | ||
| Makefile | ||
| README | ||
| 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/.