hpcc-systems/HPCC-Platform — pull request #3417 by ghalliday (2012-09-28 09:40:00+00:00)
Title: HPCC-7808 Fix a few issues with DISTRIBUTE(,SKEW)

This fixes a couple of issues:

* DISTRIBUTE(,SKEW) wasn't tracked as preserving the global sort order

* DISTRIBUTE(,SKEW) could be optimized away if the input dataset didn't
have a known distibution.

* Add some more test cases to ensure it is handled correctly

Signed-off-by: Gavin Halliday