tree 48139fafa14849f8548486b5973fc885aa58871f
parent aaa888ba68568eea5b32a9afc2dfd885263d7aa9
author Yingyi Bu <buyingyi@gmail.com> 1443153988 -0700
committer Yingyi Bu <buyingyi@gmail.com> 1444360673 -0700

ASTERIXDB-221: reduce unneceesary partitioning for hash joins.

For a hash join, start top-down data property optimization from
a partitioning-compatiable child, and hence the other child's
partitioning requirement could be updated.

Change-Id: I835ea712c2f427149d45464fcb3841b8d33f6507
Reviewed-on: https://asterix-gerrit.ics.uci.edu/395
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Wenhai Li <lwhaymail@yahoo.com>
Reviewed-by: Yingyi Bu <buyingyi@gmail.com>