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Michael Paquier 374464c3e9 Fix slot data persistency when advancing physical replication slots 
Advancing a physical replication slot with pg_replication_slot_advance()
did not mark the slot as dirty if any advancing was done, preventing the
follow-up checkpoint to flush the slot data to disk.  This caused the
advancing to be lost even on clean restarts.  This does not happen for
logical slots as any advancing marked the slot as dirty.  Per
discussion, the original feature has been implemented so as in the event
of a crash the slot may move backwards to a past LSN.  This property is
kept and more documentation is added about that.

This commit adds some new TAP tests to check the persistency of physical
and logical slots after advancing across clean restarts.

Author: Alexey Kondratov, Michael Paquier
Reviewed-by: Andres Freund, Kyotaro Horiguchi, Craig Ringer
Discussion: https://postgr.es/m/059cc53a-8b14-653a-a24d-5f867503b0ee@postgrespro.ru
Backpatch-through: 11
 		2020-01-30 11:15:35 +09:00
config configure: Update python search order 2019-01-13 10:24:21 +01:00
contrib In postgres_fdw, don't try to ship MULTIEXPR updates to remote server. 2020-01-26 14:31:08 -05:00
doc Fix slot data persistency when advancing physical replication slots 2020-01-30 11:15:35 +09:00
src Fix slot data persistency when advancing physical replication slots 2020-01-30 11:15:35 +09:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:36 -08:00
.gitattributes Remove contrib/tsearch2. 2017-02-13 11:06:11 -05:00
.gitignore Support for optimizing and emitting code in LLVM JIT provider. 2018-03-22 11:05:22 -07:00
COPYRIGHT Update copyrights for 2020 2020-01-01 12:21:44 -05:00
GNUmakefile.in Process EXTRA_INSTALL serially, during the first temp-install. 2018-12-31 13:55:01 -08:00
HISTORY Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
Makefile Don't unset MAKEFLAGS in non-GNU Makefile. 2019-06-25 09:40:20 +12:00
README Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
README.git Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
aclocal.m4 Fix configure's AC_CHECK_DECLS tests to work correctly with clang. 2018-11-19 12:01:47 -05:00
configure Fix handling of OpenSSL's SSL_clear_options 2019-12-06 15:14:31 +09:00
configure.in Fix handling of OpenSSL's SSL_clear_options 2019-12-06 15:14:31 +09:00

README 

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/.