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Robert Haas b10967eddf Avoid projecting tuples unnecessarily in Gather and Gather Merge. 
It's most often the case that the target list for the Gather (Merge)
node matches the target list supplied by the underlying plan node;
when this is so, we can avoid the overhead of projecting.

This depends on commit f455e1125e for
proper functioning.

Idea by Andres Freund.  Patch by me.  Review by Amit Kapila.

Discussion: http://postgr.es/m/CA+TgmoZ0ZL=cesZFq8c9NnfK6bqy-wwUd3_74iYGodYrSoQ7Fw@mail.gmail.com
2017-11-25 10:49:17 -05:00
..
backend Avoid projecting tuples unnecessarily in Gather and Gather Merge. 2017-11-25 10:49:17 -05:00
bin Fix typo 2017-11-22 21:52:28 +01:00
common Change TRUE/FALSE to true/false 2017-11-08 11:37:28 -05:00
fe_utils Exclude flex-generated code from coverage testing 2017-10-16 16:28:11 -04:00
include Avoid projecting tuples unnecessarily in Gather and Gather Merge. 2017-11-25 10:49:17 -05:00
interfaces Support channel binding 'tls-unique' in SCRAM 2017-11-18 10:15:54 -05:00
makefiles Always use -fPIC, not -fpic, when building shared libraries with gcc. 2017-06-01 13:32:55 -04:00
pl Support linking with MinGW-built Perl. 2017-11-23 20:22:04 -08:00
port Rewrite strnlen replacement implementation from 8a241792f9. 2017-10-10 14:50:30 -07:00
template Force "restrict" not to be used when compiling with xlc. 2017-10-13 12:15:06 -07:00
test Fix unstable regression test added by commits 59b71c6fe et al. 2017-11-24 00:29:20 -05:00
timezone Update time zone data files to tzdata release 2017c. 2017-10-23 18:15:36 -04:00
tools Support linking with MinGW-built Perl. 2017-11-23 20:22:04 -08:00
tutorial Distinguish selectivity of < from <= and > from >=. 2017-09-13 11:12:39 -04:00
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:04 +02:00
DEVELOPERS Replace a couple of references to files that no longer exist in the source 2009-05-04 08:08:47 +00:00
Makefile Build src/test/isolation during "make" and "make install". 2017-11-22 20:18:15 -08:00
Makefile.global.in Convert documentation to DocBook XML 2017-11-23 09:44:28 -05:00
Makefile.shlib Remove support for bcc and msvc standalone libpq builds 2017-04-11 15:22:21 +02:00
nls-global.mk nls-global.mk: search build dir for source files, too 2016-06-07 18:55:18 -04:00