tree a7115588a7fb6b88390331aa1b51433ebe640049
parent 6d999ed1a24662c87bde4897b7f4edab671ddc57
author Yingyi Bu <yingyi@couchbase.com> 1468457808 -0700
committer Yingyi Bu <buyingyi@gmail.com> 1468463382 -0700

Support SQL-compliant group-by syntax.

1. Add AST-level deep equality and expression subsutitions;
2. Fix DeepCopyVisitor and InlineColumnAliasVisitor for edge cases;
3. Add deep equality tests;
4. Add group-by tests for the SQL-compliant syntax.

Change-Id: Ia1cbe1fab216b5f47577d75fd870a537cfe1e84f
Reviewed-on: https://asterix-gerrit.ics.uci.edu/990
Sonar-Qube: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Till Westmann <tillw@apache.org>