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Andres Freund 51ad5b9bd3 jit: Re-allow JIT compilation of execGrouping.c hashtable comparisons. In the course of `5567d12ce0`, `356687bd8` and `317ffdfeaa`, I changed BuildTupleHashTable[Ext]'s call to ExecBuildGroupingEqual to not pass in the parent node, but NULL. Which in turn prevents the tuple equality comparator from being JIT compiled. While that fixes bug #15486, it is not actually necessary after all of the above commits, as we don't re-build the comparator when using the new BuildTupleHashTableExt() interface (as the content of the hashtable are reset, but the TupleHashTable itself is not). Therefore re-allow jit compilation for callers that use BuildTupleHashTableExt with a separate context for "metadata" and content. As in the previous commit, there's ongoing work to make this easier to test to prevent such regressions in the future, but that infrastructure is not going to be backpatchable. The performance impact of not JIT compiling hashtable equality comparators can be substantial e.g. for aggregation queries that aggregate a lot of input rows to few output rows (when there are a lot of output groups, there will be fewer comparisons). Author: Andres Freund Discussion: https://postgr.es/m/20190927072053.njf6prdl3vb7y7qb@alap3.anarazel.de Backpatch: 11, just as `5567d12ce0`		2019-09-29 16:27:08 -07:00
config	configure: Update python search order	2019-01-13 10:24:21 +01:00
contrib	Fix failure with lock mode used for custom relation options	2019-09-25 10:08:30 +09:00
doc	Doc: clean up markup for jsonb_set and related functions.	2019-09-27 11:01:36 -04:00
src	jit: Re-allow JIT compilation of execGrouping.c hashtable comparisons.	2019-09-29 16:27:08 -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	Stamp 11.5.	2019-08-05 17:14:59 -04:00
configure.in	Stamp 11.5.	2019-08-05 17:14:59 -04:00
COPYRIGHT	Update copyright for 2019	2019-01-02 12:44:25 -05:00
GNUmakefile.in	Process EXTRA_INSTALL serially, during the first temp-install.	2018-12-31 13:55:01 -08:00
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/.