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Tom Lane 5d7515d7d1 Fix intra-query memory leak when a SRF returns zero rows.
When looping around after finding that the set-returning function
returned zero rows for the current input tuple, ExecProjectSet
neglected to reset either of the two memory contexts it's
responsible for cleaning out.  Typically this wouldn't cause much
problem, because once the SRF does return at least one row, the
contexts would get reset on the next call.  However, if the SRF
returns no rows for many input tuples in succession, quite a lot
of memory could be transiently consumed.

To fix, make sure we reset both contexts while looping around.

Per bug #18172 from Sergei Kornilov.  Back-patch to all supported
branches.

Discussion: https://postgr.es/m/18172-9b8c5fc1d676ded3@postgresql.org
2023-10-28 14:04:43 -04:00
config Log LLVM library version in configure output. 2023-10-22 14:29:00 +13:00
contrib Dissociate btequalimage() from interval_ops, ending its deduplication. 2023-10-14 16:33:54 -07:00
doc Doc: remove misleading info about ecpg's CONNECT/DISCONNECT DEFAULT. 2023-10-25 17:34:47 -04:00
src Fix intra-query memory leak when a SRF returns zero rows. 2023-10-28 14:04:43 -04:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
.editorconfig Add .editorconfig 2019-12-18 09:13:13 +01:00
.git-blame-ignore-revs Backpatch addition of .git-blame-ignore-revs 2022-08-05 19:36:24 +02:00
.gitattributes gitattributes: Add new entry to silence whitespace error 2021-06-05 07:57:31 +02:00
.gitignore Add portlock directory to .gitignore 2022-11-26 07:47:06 -05:00
COPYRIGHT Update copyright for 2023 2023-01-02 15:00:37 -05:00
GNUmakefile.in Remove temporary portlock directory during make [dist]clean. 2022-11-26 10:30:53 -05:00
HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
Makefile Don't unset MAKEFLAGS in non-GNU Makefile. 2019-06-25 09:36:21 +12:00
README Canonicalize some URLs 2020-02-10 20:47:50 +01:00
README.git Canonicalize some URLs 2020-02-10 20:47:50 +01:00
aclocal.m4 Probe $PROVE not $PERL while checking for modules needed by TAP tests. 2021-11-22 12:54:52 -05:00
configure Log LLVM library version in configure output. 2023-10-22 14:29:00 +13:00
configure.ac Stamp 14.9. 2023-08-07 16:10:05 -04:00

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/.