@Override
    public Object getStructFieldData(Object data, StructField fieldRef) {
      // For performance don't check that that the fieldRef isn't recId everytime,
      // just assume that the caller used getAllStructFieldRefs and thus doesn't have that fieldRef
      return wrapped.getStructFieldData(data, fieldRef);
    }
An ObjectInspector that will strip out the record identifier so that the underlying writer
doesn't see it.
ql/src/java/org/apache/hadoop/hive/ql/io/orc/OrcRecordUpdater.java