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Tom Lane 1dec82068b Better fix for deadlock hazard in CREATE INDEX CONCURRENTLY. 
Commit 54eff5311 did not account for the possibility that we'd have
a transaction snapshot due to default_transaction_isolation being
set high enough to require one.  The transaction snapshot is enough
to hold back our advertised xmin and thus risk deadlock anyway.
The only way to get rid of that snap is to start a new transaction,
so let's do that instead.  Also throw in an assert checking that we
really have gotten to a state where no xmin is being advertised.

Back-patch to 9.4, like the previous commit.

Discussion: https://postgr.es/m/CAMkU=1ztk3TpQdcUNbxq93pc80FrXUjpDWLGMeVBDx71GHNwZQ@mail.gmail.com
 		2018-04-18 12:07:37 -04:00
..
backend Better fix for deadlock hazard in CREATE INDEX CONCURRENTLY. 2018-04-18 12:07:37 -04:00
bin Rationalize handling of single and double quotes in bootstrap data. 2018-04-17 19:53:50 -04:00
common Fix partial-build problems introduced by having more generated headers. 2018-04-09 16:42:10 -04:00
fe_utils Switch client-side code to include catalog/pg_foo_d.h not pg_foo.h. 2018-04-08 13:59:52 -04:00
include Rationalize handling of single and double quotes in bootstrap data. 2018-04-17 19:53:50 -04:00
interfaces In libpq, free any partial query result before collecting a server error. 2018-04-13 12:53:45 -04:00
makefiles Fix pgxs.mk to not try to build generated headers in external builds. 2018-04-10 12:41:51 -04:00
pl Support named and default arguments in CALL 2018-04-14 09:13:53 -04:00
port Fix partial-build problems introduced by having more generated headers. 2018-04-09 16:42:10 -04:00
template Force "restrict" not to be used when compiling with xlc. 2017-10-13 12:15:06 -07:00
test Improve coverage of nodeAppend runtime partition prune 2018-04-17 12:16:22 -03:00
timezone Update time zone data files to tzdata release 2018c. 2018-01-27 16:42:28 -05:00
tools Revert MERGE patch 2018-04-12 11:22:56 +01:00
tutorial Update copyright for 2018 2018-01-02 23:30:12 -05:00
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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 Invoke submake-generated-headers during "make check", too. 2018-04-11 13:18:54 -04:00
Makefile.shlib Prevent accidental linking of system-supplied copies of libpq.so etc. 2018-04-03 16:26:05 -04:00
nls-global.mk nls-global.mk: search build dir for source files, too 2016-06-07 18:55:18 -04:00