private void setIsRepeating(ListColumnVector lcv) {
    ColumnVector child0 = getChildData(lcv, 0);
    for (int i = 1; i < lcv.offsets.length; i++) {
      ColumnVector currentChild = getChildData(lcv, i);
      if (!compareColumnVector(child0, currentChild)) {
        lcv.isRepeating = false;
        return;
      }
    }
    lcv.isRepeating = true;
  }
Finish the result ListColumnVector with all collected information.
ql/src/java/org/apache/hadoop/hive/ql/io/parquet/vector/VectorizedListColumnReader.java