public Object extractRowColumn(
      ColumnVector colVector, TypeInfo typeInfo, ObjectInspector objectInspector, int batchIndex) {
    return extractRowColumn(colVector, typeInfo, objectInspector, batchIndex, OutputType.WRITABLES);
  }
Extract a row's column object from the ColumnVector at batchIndex in the VectorizedRowBatch.

@param batch
@param batchIndex
@param logicalColumnIndex
@return
ql/src/java/org/apache/hadoop/hive/ql/exec/vector/VectorExtractRow.java