If you have some json data like this...
... there is no way to select any of the rows since their identifiers contain dots and when trying to select them, Drill throws the following error:
Error: SYSTEM ERROR: UnsupportedOperationException: Unhandled field reference "0.0.1"; a field reference identifier must not have the form of a qualified name
This must be fixed since there are many json data files containing dots in some of the keys (e.g. when specifying version numbers etc)