Tom Lane 656b1e8cf3 Further fixes for degenerate outer join clauses. ... Further testing revealed that commit f69b4b9495 was still a few bricks shy of a load: minor tweaking of the previous test cases resulted in the same wrong-outer-join-order problem coming back. After study I concluded that my previous changes in make_outerjoininfo() were just accidentally masking the problem, and should be reverted in favor of forcing syntactic join order whenever an upper outer join's predicate doesn't mention a lower outer join's LHS. This still allows the chained-outer-joins style that is the normally optimizable case. I also tightened things up some more in join_is_legal(). It seems to me on review that what's really happening in the exception case where we ignore a mismatched special join is that we're allowing the proposed join to associate into the RHS of the outer join we're comparing it to. As such, we should *always* insist that the proposed join be a left join, which eliminates a bunch of rather dubious argumentation. The case where we weren't enforcing that was the one that was already known buggy anyway (it had a violatable Assert before the aforesaid commit) so it hardly deserves a lot of deference. Back-patch to all active branches, like the previous patch. The added regression test case failed in all branches back to 9.1, and I think it's only an unrelated change in costing calculations that kept 9.0 from choosing a broken plan.		2015-08-06 15:35:27 -04:00
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examples	Fix lo_export usage in example programs.	2012-10-08 21:18:57 -04:00
isolation	Fix portability issue in isolationtester grammar.	2015-05-27 19:14:40 -04:00
locale	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
mb	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
performance	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
regress	Further fixes for degenerate outer join clauses.	2015-08-06 15:35:27 -04:00
thread	Check the return code of pthread_create(). Otherwise we go into an infinite	2011-05-27 12:55:02 +03:00
Makefile	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00