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The activation and deactivation of commit timestamp tracking has not been handled consistently for a primary or standbys at recovery. The facility can be activated at three different moments of recovery: - The beginning, where a primary would use the GUC value for the decision-making, and where a standby relies on the contents of the control file. - When replaying a XLOG_PARAMETER_CHANGE record at redo. - The end, where both primary and standby rely on the GUC value. Using the GUC value for a primary at the beginning of recovery causes problems with commit timestamp access when doing crash recovery. Particularly, when replaying transaction commits, it could be possible that an attempt to read commit timestamps is done for a transaction which committed at a moment when track_commit_timestamp was disabled. A test case is added to reproduce the failure. The test works down to v11 as it takes advantage of transaction commits within procedures. Reported-by: Hailong Li Author: Masahiko Sawasa, Michael Paquier Reviewed-by: Kyotaro Horiguchi Discussion: https://postgr.es/m/11224478-a782-203b-1f17-e4797b39bdf0@qunar.com Backpatch-through: 9.5, where commit timestamps have been introduced. |
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| configure | ||
| configure.in | ||
| COPYRIGHT | ||
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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: 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/.