@Override
  public void close() throws IOException {
    flushInternalBatch();
    super.close();
  }
Set the value for a given column value within a batch.
@param rowId the row to set
@param column the column to set
@param inspector the object inspector to interpret the obj
@param obj the value to use
ql/src/java/org/apache/hadoop/hive/ql/io/orc/WriterImpl.java