Tom Lane 43ccd309cb Resurrect the "last ditch" code path in join_search_one_level(). ... This essentially reverts commit e54b10a62d, in which I'd decided that the "last ditch" join logic was useless. The folly of that is now exposed by a report from Pavel Stehule: although the function should always find at least one join in a self-contained join problem, it can still fail to do so in a sub-problem created by artificial from_collapse_limit or join_collapse_limit constraints. Adjust the comments to describe this, and simplify the code a bit to match the new coding of the earlier loop in the function. I'm not terribly happy about this: I still subscribe to the opinion stated in the previous commit message that the "last ditch" code can obscure logic bugs elsewhere. But the alternative seems to be to complicate the earlier tests for does-this-relation-have-a-join-clause to the point where they can tell whether the join clauses link outside the current join sub-problem. And that looks messy, slow, and possibly a source of bugs in itself. In any case, now is not the time to be inserting experimental code into 9.2, so let's just go back to the time-tested solution.		2012-08-15 00:08:42 -04:00
..
backend	Resurrect the "last ditch" code path in join_search_one_level().	2012-08-15 00:08:42 -04:00
bin	Translation updates	2012-08-14 16:37:40 -04:00
include	Stamp 9.2beta4.	2012-08-14 18:38:49 -04:00
interfaces	Translation updates	2012-08-14 16:37:40 -04:00
makefiles	Remove BSD/OS (BSDi) port. There are no known users upgrading to	2012-05-03 10:58:44 -04:00
pl	Translation updates	2012-08-14 16:37:40 -04:00
port	Improve reporting of error situations in find_other_exec().	2012-07-27 19:31:19 -04:00
template	Remove BSD/OS (BSDi) port. There are no known users upgrading to	2012-05-03 10:58:44 -04:00
test	Prevent access to external files/URLs via XML entity references.	2012-08-14 18:31:42 -04:00
timezone	Update time zone data files to tzdata release 2012e.	2012-08-14 10:54:30 -04:00
tools	Run updated copyright.pl on HEAD and 9.2 trees, updating the psql	2012-07-06 12:28:18 -04:00
tutorial	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
.gitignore	Convert cvsignore to gitignore, and add .gitignore for build targets.	2010-09-22 12:57:04 +02:00
bcc32.mak	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +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	Fix some oversights in distprep and maintainer-clean targets.	2011-03-10 00:04:05 -05:00
Makefile.global.in	Fix pg_config.h make rule	2012-05-07 21:28:38 +03:00
Makefile.shlib	Remove BSD/OS (BSDi) port. There are no known users upgrading to	2012-05-03 10:58:44 -04:00
nls-global.mk	Lots of doc corrections.	2012-04-23 22:43:09 -04:00
win32.mak	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00