postgresql

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Amit Kapila 830d756590 Don't allow LIMIT/OFFSET clause within sub-selects to be pushed to workers.

Allowing sub-select containing LIMIT/OFFSET in workers can lead to
inconsistent results at the top-level as there is no guarantee that the
row order will be fully deterministic.  The fix is to prohibit pushing
LIMIT/OFFSET within sub-selects to workers.

Reported-by: Andrew Fletcher
Bug: 15324
Author: Amit Kapila
Reviewed-by: Dilip Kumar
Backpatch-through: 9.6
Discussion: https://postgr.es/m/153417684333.10284.11356259990921828616@wrigleys.postgresql.org

2018-09-14 09:51:47 +05:30

allpaths.c

Don't allow LIMIT/OFFSET clause within sub-selects to be pushed to workers.

2018-09-14 09:51:47 +05:30

clausesel.c

Update copyright for 2018

2018-01-02 23:30:12 -05:00

costsize.c

Fix hashjoin costing mistake introduced with inner_unique optimization.

2018-07-14 11:59:12 -04:00

equivclass.c

Fix misprocessing of equivalence classes involving record_eq().