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Peter Geoghegan 87eb25535d Backpatch tuplesort.c assertion. 
Backpatch an assertion (that was originally added to Postgres 12 by
commit dd299df818) that seems broadly useful.  The assertion can detect
violations of the HOT invariant (i.e. no two index tuples can point to
the same heap TID) when CREATE INDEX somehow incorrectly allows that to
take place.

For example, a IndexBuildHeapScan/heapam_index_build_range_scan bug
might result in two tuples that both point to the same heap TID.  If
these two tuples also happen to be duplicates, the assertion will fail.

Discussion: https://postgr.es/m/CAH2-WzmBxu4o=pMsniur+bwHqCGCmV_AOLkuK6BuU7ngA6evqw@mail.gmail.com
Backpatch: 9.5-11 only
2020-07-29 16:00:54 -07:00
config configure: Update python search order 2019-01-13 10:24:21 +01:00
contrib Fix corner case with 16kB-long decompression in pgcrypto, take 2 2020-07-27 15:59:03 +09:00
doc Doc: Improve documentation for pg_jit_available() 2020-07-28 22:52:58 +12:00
src Backpatch tuplesort.c assertion. 2020-07-29 16:00:54 -07:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:36 -08:00
.gitattributes Remove contrib/tsearch2. 2017-02-13 11:06:11 -05:00
.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 Replace use of sys_siglist[] with strsignal(). 2020-07-15 22:05:12 -04:00
configure.in Replace use of sys_siglist[] with strsignal(). 2020-07-15 22:05:12 -04:00
COPYRIGHT Update copyrights for 2020 2020-01-01 12:21:44 -05:00
GNUmakefile.in Make install-tests target work with vpath builds 2020-05-31 18:35:21 -04:00
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 09:40:20 +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/.