tree 11e1a8fd8469931e0cca2959f3571908fb9e2065
parent b71a9d09b8f5117e6aa903a172d365d217b4357b
author Yingyi Bu <yingyi@couchbase.com> 1459038305 -0700
committer Yingyi Bu <buyingyi@gmail.com> 1459195950 -0700

ASTERIXDB-1226: implement SQL++ core group-by semantics and syntatic sugars.

-Implmented SQL++ core group-by semantics;
-Implemented SQL++ group-by syntatic sugars for standard SQL;
-Added test cases;
-Fixed column alias rewriter;
-Fixed the variable scoping for joins.

Change-Id: I6e5477d5bf80114cfff49c8ecb163849ee55eba6
Reviewed-on: https://asterix-gerrit.ics.uci.edu/752
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Till Westmann <tillw@apache.org>