tree b0969d2eee2e7849ed874e107ee0c750f5341c08
parent fcd89f5a92a80b2b69d99845471856a5909be9a8
author Yingyi Bu <yingyi@couchbase.com> 1502999455 -0700
committer Yingyi Bu <buyingyi@gmail.com> 1503016115 -0700

[ASTERIXDB-2044][COMP] Eliminate listify for complex group-by

- user model changes: no
- storage format changes: no
- interface changes: no

Details:
- Fix EliminateSubplanWithInputCardinalityOneRule to handle recursive
  subplans;
- Fix various places that assumes the nested plans inside a group-by
  operator cannot be empty;
- Added regression tests.

Change-Id: Ida9aa8d89a89f90256e54c8c1806af9b4a162d21
Reviewed-on: https://asterix-gerrit.ics.uci.edu/1946
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Contrib: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Yingyi Bu <buyingyi@gmail.com>