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Alvaro Herrera d5e3d1e969 Fix thinko in lock mode enum 
Commit 0e5680f473 contained a thinko
mixing LOCKMODE with LockTupleMode.  This caused misbehavior in the case
where a tuple is marked with a multixact with at most a FOR SHARE lock,
and another transaction tries to acquire a FOR NO KEY EXCLUSIVE lock;
this case should block but doesn't.

Include a new isolation tester spec file to explicitely try all the
tuple lock combinations; without the fix it shows the problem:

    starting permutation: s1_begin s1_lcksvpt s1_tuplock2 s2_tuplock3 s1_commit
    step s1_begin: BEGIN;
    step s1_lcksvpt: SELECT * FROM multixact_conflict FOR KEY SHARE; SAVEPOINT foo;
    a

    1
    step s1_tuplock2: SELECT * FROM multixact_conflict FOR SHARE;
    a

    1
    step s2_tuplock3: SELECT * FROM multixact_conflict FOR NO KEY UPDATE;
    a

    1
    step s1_commit: COMMIT;

With the fixed code, step s2_tuplock3 blocks until session 1 commits,
which is the correct behavior.

All other cases behave correctly.

Backpatch to 9.3, like the commit that introduced the problem.
2015-01-04 15:48:29 -03:00
config Detect PG_PRINTF_ATTRIBUTE automatically. 2014-11-23 09:34:03 -05:00
contrib Correctly handle test durations of more than 2147s in pg_test_timing. 2015-01-04 15:44:49 +01:00
doc Treat negative values of recovery_min_apply_delay as having no effect. 2015-01-03 13:14:03 -05:00
src Fix thinko in lock mode enum 2015-01-04 15:48:29 -03:00
.dir-locals.el Update Emacs configuration 2013-08-13 20:08:44 -04:00
.gitattributes Add functions for dealing with PGP armor header lines to pgcrypto. 2014-10-01 16:03:39 +03:00
.gitignore Update .gitignore for config.cache. 2014-12-18 19:56:42 +09:00
aclocal.m4 Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
configure Detect PG_PRINTF_ATTRIBUTE automatically. 2014-11-23 09:34:03 -05:00
configure.in Detect PG_PRINTF_ATTRIBUTE automatically. 2014-11-23 09:34:03 -05:00
COPYRIGHT Update copyright for 2014 2014-01-07 16:05:30 -05:00
GNUmakefile.in Add TAP tests for client programs 2014-04-14 21:33:46 -04:00
HISTORY Improve text of stub HISTORY file. 2014-02-12 18:16:17 -05:00
Makefile Allow make check in PL directories 2011-02-15 06:52:12 +02:00
README Don't generate plain-text HISTORY and src/test/regress/README anymore. 2014-02-10 20:48:04 -05:00
README.git Don't generate plain-text HISTORY and src/test/regress/README anymore. 2014-02-10 20:48:04 -05:00

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:

	http://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
http://www.postgresql.org/download/.  For more information look at our
web site located at http://www.postgresql.org/.