tree 1bc451cdf3b56b8d8e13331787b3b4a91d4da712
parent b4f66311584ddb42470d0e185a477282f4aaf73c
author luochen <cluo8@uci.edu> 1542676695 -0800
committer Luo Chen <cluo8@uci.edu> 1542769167 -0800

[ASTERIXDB-2468] Extend CountVarToCountOneRule to support no group-by

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

Details:
- Extend CountVarToCountOneRule to support the no group-by case so
that count queries without group-by can be handled as well.
- Also extend this rule to support SQL_COUNT. In this case, count(v)
is replaced with count(1) only v is not nullable.

Change-Id: Ie0808912cf45d3a914ebf7f69ec42f73b33c071f
Reviewed-on: https://asterix-gerrit.ics.uci.edu/3024
Sonar-Qube: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Contrib: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Dmitry Lychagin <dmitry.lychagin@couchbase.com>