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2057a58d16
postgresql/src/test/regress
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Tom Lane 2057a58d16 Fix mis-optimization of semijoins with more than one LHS relation. 
The inner-unique patch (commit 9c7f5229a) supposed that if we're
considering a JOIN_UNIQUE_INNER join path, we can always set inner_unique
for the join, because the inner path produced by create_unique_path should
be unique relative to the outer relation.  However, that's true only if
we're considering joining to the whole outer relation --- otherwise we may
be applying only some of the join quals, and so the inner path might be
non-unique from the perspective of this join.  Adjust the test to only
believe that we can set inner_unique if we have the whole semijoin LHS on
the outer side.

There is more that can be done in this area, but this commit is only
intended to provide the minimal fix needed to get correct plans.

Per report from Teodor Sigaev.  Thanks to David Rowley for preliminary
investigation.

Discussion: https://postgr.es/m/f994fc98-389f-4a46-d1bc-c42e05cb43ed@sigaev.ru
2017-05-01 14:39:11 -04:00
..
data Improve key representation for GIN jsonb_ops, and fix existence-search bug. 2014-05-09 08:41:26 -04:00
expected Fix mis-optimization of semijoins with more than one LHS relation. 2017-05-01 14:39:11 -04:00
input Remove support for version-0 calling conventions. 2017-03-30 06:25:46 -07:00
output Remove support for version-0 calling conventions. 2017-03-30 06:25:46 -07:00
sql Fix mis-optimization of semijoins with more than one LHS relation. 2017-05-01 14:39:11 -04:00
.gitignore Update .gitignore for config.cache. 2014-12-18 19:56:42 +09:00
GNUmakefile Remove ICU tests from default run 2017-03-25 00:30:26 -04:00
Makefile Remove remains of old depend target. 2007-01-20 17:16:17 +00:00
parallel_schedule Identity columns 2017-04-06 08:41:37 -04:00
pg_regress_main.c Fix inclusions of postgres_fe.h from .h files. 2017-03-08 20:41:06 -05:00
pg_regress.c Force the regression databases to have bytea_output set to hex 2017-03-20 18:12:24 -04:00
pg_regress.h Fix inclusions of postgres_fe.h from .h files. 2017-03-08 20:41:06 -05:00
README Don't generate plain-text HISTORY and src/test/regress/README anymore. 2014-02-10 20:48:04 -05:00
regress.c Improve 64bit atomics support. 2017-04-07 14:48:11 -07:00
regressplans.sh Rename 'gmake' to 'make' in docs and recommended commands 2014-02-12 17:29:19 -05:00
resultmap Enable compiling with the mingw-w64 32 bit compiler. 2011-12-10 15:35:41 -05:00
serial_schedule Identity columns 2017-04-06 08:41:37 -04:00
standby_schedule Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00

README 

Documentation concerning how to run these regression tests and interpret
the results can be found in the PostgreSQL manual, in the chapter
"Regression Tests".