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Etsuro Fujita 5c47049180 postgres_fdw: Fix incorrect handling of row movement for remote partitions. 
Commit 3d956d9562 added support for update row movement in postgres_fdw.
This patch fixes the following issues introduced by that commit:

* When a remote partition chosen to insert routed rows into was also an
  UPDATE subplan target rel that would be updated later, the UPDATE that
  used a direct modification plan modified those routed rows incorrectly
  because those routed rows were visible to the later UPDATE command.
  The right fix for this would be to have some way in postgres_fdw in
  which the later UPDATE command ignores those routed rows, but it seems
  hard to do so with the current infrastructure.  For now throw an error
  in that case.

* When a remote partition chosen to insert routed rows into was also an
  UPDATE subplan target rel, fmstate created for the UPDATE that used a
  non-direct modification plan was mistakenly overridden by another
  fmstate created for inserting those routed rows into the partition.
  This caused 1) server crash when the partition would be updated later,
  and 2) resource leak when the partition had been already updated.  To
  avoid that, adjust the treatment of the fmstate for the inserting.  As
  for #1, since we would also have the incorrectness issue as mentioned
  above, error out in that case as well.

Update the docs to mention that postgres_fdw currently does not handle
the case where a remote partition chosen to insert a routed row into is
also an UPDATE subplan target rel that will be updated later.

Author: Amit Langote and Etsuro Fujita
Reviewed-by: Amit Langote
Backpatch-through: 11 where row movement in postgres_fdw was added
Discussion: https://postgr.es/m/21e7eaa4-0d4d-20c2-a1f7-c7e96f4ce440@lab.ntt.co.jp
 		2019-04-24 18:31:50 +09:00
config Fix vpath build 2019-03-27 23:36:00 +01:00
contrib postgres_fdw: Fix incorrect handling of row movement for remote partitions. 2019-04-24 18:31:50 +09:00
doc postgres_fdw: Fix incorrect handling of row movement for remote partitions. 2019-04-24 18:31:50 +09:00
src Allow pg_class xid & multixid horizons to not be set. 2019-04-23 21:42:12 -07:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
.gitattributes doc: Add some images 2019-03-27 23:10:23 +01:00
.gitignore Support for optimizing and emitting code in LLVM JIT provider. 2018-03-22 11:05:22 -07:00
COPYRIGHT Update copyright for 2019 2019-01-02 12:44:25 -05:00
GNUmakefile.in Process EXTRA_INSTALL serially, during the first temp-install. 2018-12-31 13:54:38 -08:00
HISTORY Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
Makefile Fix non-GNU makefiles for AIX make. 2017-11-30 00:57:22 -08:00
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 Reorder configure tests for accept() in Windows 2019-03-04 14:42:12 -05:00
configure.in Fix PERMIT_DECLARATION_AFTER_STATEMENT initialization. 2019-02-16 13:12:28 -08:00

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/.