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Tom Lane 97fb88ea4a Fix isolationtester race condition for notices sent before blocking. 
If a test sends a notice just before blocking, it's possible on
slow machines for isolationtester to detect the blocked state before
it's consumed the notice.  (For this to happen, the notice would have
to arrive after isolationtester has waited for data for 10ms, so on
fast/lightly-loaded machines it's hard to reproduce the failure.)
But, if we have seen the backend as blocked, it's certainly already
sent any notices it's going to send.  Therefore, one more round of
PQconsumeInput and PQisBusy should be enough to collect and process
any such notices.

Back-patch of 30717637c into v12.  We're still discussing whether
to back-patch this further and/or back-patch some other recent
isolationtester fixes, but this much is provably necessary to
make the test cases added by 27cc7cd2b stable in v12.

Discussion: https://postgr.es/m/14616.1564251339@sss.pgh.pa.us
Discussion: https://postgr.es/m/E1i7IqC-0000Uc-5H@gemulon.postgresql.org
2019-09-09 22:53:51 -04:00
config Update config.guess and config.sub 2019-04-27 14:25:00 +02:00
contrib amcheck: Skip unlogged relations during recovery. 2019-08-12 15:21:30 -07:00
doc Fix behavior of AND CHAIN outside of explicit transaction blocks 2019-09-08 16:22:51 +02:00
src Fix isolationtester race condition for notices sent before blocking. 2019-09-09 22:53:51 -04:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
.gitattributes Add XSL stylesheet to fix up SVG files 2019-06-19 21:26:42 +02:00
.gitignore Support for optimizing and emitting code in LLVM JIT provider. 2018-03-22 11:05:22 -07:00
aclocal.m4 Fix configure's AC_CHECK_DECLS tests to work correctly with clang. 2018-11-19 12:01:47 -05:00
configure Stamp 12beta4. 2019-09-09 16:24:29 -04:00
configure.in Stamp 12beta4. 2019-09-09 16:24:29 -04:00
COPYRIGHT Update copyright for 2019 2019-01-02 12:44:25 -05:00
GNUmakefile.in Integrate cpluspluscheck into build system. 2019-05-31 12:36:17 -07:00
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 09:36:21 +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

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/.