Tom Lane ec94bc1473 Undo mistaken tightening in join_is_legal(). ... One of the changes I made in commit 8703059c6b turns out not to have been such a good idea: we still need the exception in join_is_legal() that allows a join if both inputs already overlap the RHS of the special join we're checking. Otherwise we can miss valid plans, and might indeed fail to find a plan at all, as in recent report from Andreas Seltenreich. That code was added way back in commit c17117649b, but I failed to include a regression test case then; my bad. Put it back with a better explanation, and a test this time. The logic does end up a bit different than before though: I now believe it's appropriate to make this check first, thereby allowing such a case whether or not we'd consider the previous SJ(s) to commute with this one. (Presumably, we already decided they did; but it was confusing to have this consideration in the middle of the code that was handling the other case.) Back-patch to all active branches, like the previous patch.		2015-08-12 21:19:04 -04:00
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examples	Fix up .gitignore and cleanup actions in some src/test/ subdirectories.	2015-04-24 17:13:06 -04:00
isolation	Temporarily(?) remove BRIN isolation test.	2015-08-10 10:22:47 -04:00
locale	Fix up .gitignore and cleanup actions in some src/test/ subdirectories.	2015-04-24 17:13:06 -04:00
mb	Fix broken multibyte regression tests.	2015-08-09 11:03:29 +09:00
modules	RLS: Keep deny policy when only restrictive exist	2015-08-03 15:32:58 -04:00
perl	Make tap tests store postmaster logs and handle vpaths correctly	2015-07-28 16:04:05 -04:00
regress	Undo mistaken tightening in join_is_legal().	2015-08-12 21:19:04 -04:00
ssl	Improve logging of TAP tests.	2015-07-28 12:22:21 -04:00
thread	Fix up .gitignore and cleanup actions in some src/test/ subdirectories.	2015-04-24 17:13:06 -04:00
Makefile	Fix up .gitignore and cleanup actions in some src/test/ subdirectories.	2015-04-24 17:13:06 -04:00