tree 860d87c91451db2aeeb1f6e9e0fc90b30b236b5d
parent 14796d19548e14ad98596e05556bbf960b8106c9
author Yingyi Bu <yingyi@couchbase.com> 1465348996 -0700
committer Yingyi Bu <buyingyi@gmail.com> 1465402861 -0700

ASTERIXDB-1223: let incompatiable comparisons return null.

- make null/missing/true/false case-insensitive;
- add tests for incompatible comparisons;
- add tests for group-by/order-by with MISSING valued keys.

Change-Id: I8130d505f810631231d3755941ce4de64313501b
Reviewed-on: https://asterix-gerrit.ics.uci.edu/912
Reviewed-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Till Westmann <tillw@apache.org>