java/tsfile/src/main/java/org/apache/tsfile/read/common/block/column/BinaryColumn.java [226:252]:
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      values[i] = values[j];
      values[j] = valueTmp;
    }
    if (valueIsNull != null) {
      for (int i = arrayOffset, j = arrayOffset + positionCount - 1; i < j; i++, j--) {
        boolean isNullTmp = valueIsNull[i];
        valueIsNull[i] = valueIsNull[j];
        valueIsNull[j] = isNullTmp;
      }
    }
  }

  @Override
  public Column getPositions(int[] positions, int offset, int length) {
    checkArrayRange(positions, offset, length);

    return DictionaryColumn.createInternal(
        offset, length, this, positions, DictionaryId.randomDictionaryId());
  }

  @Override
  public Column copyPositions(int[] positions, int offset, int length) {
    checkArrayRange(positions, offset, length);

    boolean[] newValueIsNull = null;
    if (valueIsNull != null) {
      newValueIsNull = new boolean[length];
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java/tsfile/src/main/java/org/apache/tsfile/read/common/block/column/BooleanColumn.java [193:219]:
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      values[i] = values[j];
      values[j] = valueTmp;
    }
    if (valueIsNull != null) {
      for (int i = arrayOffset, j = arrayOffset + positionCount - 1; i < j; i++, j--) {
        boolean isNullTmp = valueIsNull[i];
        valueIsNull[i] = valueIsNull[j];
        valueIsNull[j] = isNullTmp;
      }
    }
  }

  @Override
  public Column getPositions(int[] positions, int offset, int length) {
    checkArrayRange(positions, offset, length);

    return DictionaryColumn.createInternal(
        offset, length, this, positions, DictionaryId.randomDictionaryId());
  }

  @Override
  public Column copyPositions(int[] positions, int offset, int length) {
    checkArrayRange(positions, offset, length);

    boolean[] newValueIsNull = null;
    if (valueIsNull != null) {
      newValueIsNull = new boolean[length];
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