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Etsuro Fujita f862d57057 Further fix for EvalPlanQual with mix of local and foreign partitions. 
We assume that direct-modify ForeignScan nodes cannot be re-evaluated
during EvalPlanQual processing, but the rework for inherited
UPDATE/DELETE in commit 86dc90056 changed things, without considering
that, so that such ForeignScan nodes get called as part of the
EvalPlanQual subtree during EvalPlanQual processing in the case of an
inherited UPDATE/DELETE where the inheritance set contains foreign
target relations.  To avoid re-evaluating such ForeignScan nodes during
EvalPlanQual processing, commit c3928b467 modified nodeForeignscan.c,
but the assumption made there that ExecForeignScan() should never be
called for such ForeignScan nodes during EvalPlanQual processing turned
out to be wrong in some cases, leading to a segmentation fault or a
"cannot re-evaluate a Foreign Update or Delete during EvalPlanQual"
error.

Fix by modifying nodeForeignscan.c further to avoid re-evaluating such
ForeignScan nodes even in ExecForeignScan()/ExecReScanForeignScan()
during EvalPlanQual processing.  Since this makes non-reachable the
test-and-elog added to ForeignNext() by commit c3928b467 that produced
the aforesaid error, convert the test-and-elog to an Assert.

Per bug #17355 from Alexander Lakhin.  Back-patch to v14 where both
commits came in.

Patch by me, reviewed and tested by Alexander Lakhin and Amit Langote.

Discussion: https://postgr.es/m/17355-de8e362eb7001a96@postgresql.org
 		2022-02-03 15:15:00 +09:00
config Remove configure's check for rl_completion_append_character. 2022-02-02 23:01:56 -05:00
contrib Simplify coding around path_contains_parent_reference(). 2022-01-31 13:53:38 -05:00
doc doc: clarify syntax notation, particularly parentheses 2022-02-02 21:53:52 -05:00
src Further fix for EvalPlanQual with mix of local and foreign partitions. 2022-02-03 15:15:00 +09:00
.cirrus.yml windows: Improve crash / assert / exception handling. 2022-02-02 18:33:25 -08:00
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HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
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configure Remove configure's check for rl_completion_append_character. 2022-02-02 23:01:56 -05:00
configure.ac Make EXEC_BACKEND more convenient on Linux and FreeBSD. 2022-01-11 00:04:33 +13:00

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/.