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Andres Freund 356687bd82 Reset, not recreate, execGrouping.c style hashtables. 
This uses the facility added in the preceding commit to fix
performance issues caused by rebuilding the hashtable (with its
comparator expression being the most expensive bit), after every
reset. That's especially important when the comparator is JIT
compiled.

Bug: #15592 #15486
Reported-By: Jakub Janeček, Dmitry Marakasov
Author: Andres Freund
Discussion:
    https://postgr.es/m/15486-05850f065da42931@postgresql.org
    https://postgr.es/m/20190114180423.ywhdg2iagzvh43we@alap3.anarazel.de
Backpatch: 11, where I broke this in bf6c614a2f
 		2019-02-09 01:05:49 -08:00
..
backend Reset, not recreate, execGrouping.c style hashtables. 2019-02-09 01:05:49 -08:00
bin Fix searchpath and module location for pg_rewind and ssl TAP tests 2019-02-07 11:09:08 -05:00
common Use perfect hashing, instead of binary search, for keyword lookup. 2019-01-09 19:47:46 -05:00
fe_utils pgbench: add \cset and \gset commands 2019-01-10 13:42:20 -03:00
include Allow to reset execGrouping.c style tuple hashtables. 2019-02-09 01:05:49 -08:00
interfaces Change error handling of out of scope variables in ecpg. 2019-01-30 14:35:52 +01:00
makefiles Move port-specific parts of with_temp_install to port makefile. 2019-02-04 18:54:56 +00:00
pl Renaming for new subscripting mechanism 2019-02-01 12:50:32 -03:00
port Use our own getopt() on OpenBSD. 2019-01-18 15:06:26 -05:00
template Yet further rethinking of build changes for macOS Mojave. 2018-11-02 18:54:00 -04:00
test Add pg_partition_root to display top-most parent of a partition tree 2019-02-08 08:56:14 +09:00
timezone Update time zone data files to tzdata release 2018i. 2019-02-05 10:58:53 -05:00
tools Fix perl searchpath for gen_keywordlist.pl 2019-02-07 11:14:29 -05:00
tutorial SQL comment: remove extra word in heading comment 2019-01-25 18:57:21 -05:00
.gitignore
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DEVELOPERS
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Makefile Fix partial-build problems introduced by having more generated headers. 2018-04-09 16:42:10 -04:00
Makefile.global.in Move port-specific parts of with_temp_install to port makefile. 2019-02-04 18:54:56 +00:00
Makefile.shlib Ensure static libraries have correct mod time even if ranlib messes it up. 2018-11-29 15:53:44 -05:00
nls-global.mk Replace @postgresql.org with @lists.postgresql.org for mailinglists 2019-01-19 19:06:35 +01:00