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Michael Paquier 8d28bf500f Rework activation of commit timestamps during recovery
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.
2018-09-26 10:25:54 +09:00
config Make some fixes to allow building Postgres on macOS 10.14 ("Mojave"). 2018-09-25 13:23:29 -04:00
contrib Split ExecStoreTuple into ExecStoreHeapTuple and ExecStoreBufferHeapTuple. 2018-09-25 16:27:48 -07:00
doc Sync our Snowball stemmer dictionaries with current upstream. 2018-09-24 17:29:38 -04:00
src Rework activation of commit timestamps during recovery 2018-09-26 10:25:54 +09:00
.dir-locals.el Update documentation editor setup instructions 2018-07-13 21:23:41 +02:00
.gitattributes
.gitignore Support for optimizing and emitting code in LLVM JIT provider. 2018-03-22 11:05:22 -07:00
aclocal.m4 Add configure infrastructure (--with-llvm) to enable LLVM support. 2018-03-20 17:26:25 -07:00
configure Make some fixes to allow building Postgres on macOS 10.14 ("Mojave"). 2018-09-25 13:23:29 -04:00
configure.in Make some fixes to allow building Postgres on macOS 10.14 ("Mojave"). 2018-09-25 13:23:29 -04:00
COPYRIGHT
GNUmakefile.in Remove unwanted "garbage cleanup" logic in Makefiles. 2018-08-08 14:32:29 -04:00
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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/.