tree d2ebcbb20d992f9580bf14b6c52310437b0346a1
parent c92aea67cc2439961fca229a18d75589ef241f58
author Yingyi Bu <yingyi@couchbase.com> 1459037676 -0700
committer Yingyi Bu <buyingyi@gmail.com> 1459195916 -0700

ASTERIXDB-1226: support SQL++ core group-by semantics.

-Fixed introduce group-by combiner rule;
-Fixed deep copy (without new variables) visitor.

Change-Id: I9602681a698925bde4eca33d85df66d06b9a33dd
Reviewed-on: https://asterix-gerrit.ics.uci.edu/751
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Till Westmann <tillw@apache.org>