Since the INET4 type is not handled properly during cast, InvalidCastException occurs as follows.
ERROR: INET4 value cannot be casted to INET4
org.apache.tajo.exception.InvalidCastException: INET4 value cannot be casted to INET4
SUCCESS: Integrated in Tajo-master-build #218 (See https://builds.apache.org/job/Tajo-master-build/218/)
TAJO-823: Missing INET4 handling in DatumFactory.cast(). (jihoon) (jihoonson: rev 214301fdd51b144ba65fc3dd8bd3c862d537cad7)
Hyunsik Choi thanks for your quick review!
Since the patch includes a very trivial change, I put it at Jira directly.