@Override
  public Object evaluate(DeferredObject[] arguments) throws HiveException {
    return authorizer;
  }
UDF to determine the current authorizer (class name of the authorizer)
This is intended for internal usage only. This function is not a deterministic function,
but a runtime constant. The return value is constant within a query but can be different between queries
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFCurrentAuthorizer.java