tajo-storage/src/main/java/org/apache/tajo/storage/rcfile/RCFile.java [1728:1742]:
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    private void colAdvanceRow(int selCol, SelectedColumn col) throws IOException {
      if (col.runLength > 0) {
        --col.runLength;
      } else {
        int length = (int) WritableUtils.readVLong(colValLenBufferReadIn[selCol]);
        if (length < 0) {
          // we reach a runlength here, use the previous length and reset
          // runlength
          col.runLength = (~length) - 1;
        } else {
          col.prvLength = length;
          col.runLength = 0;
        }
      }
    }
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tajo-storage/src/main/java/org/apache/tajo/storage/v2/RCFile.java [1736:1750]:
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    private void colAdvanceRow(int selCol, SelectedColumn col) throws IOException {
      if (col.runLength > 0) {
        --col.runLength;
      } else {
        int length = (int) WritableUtils.readVLong(colValLenBufferReadIn[selCol]);
        if (length < 0) {
          // we reach a runlength here, use the previous length and reset
          // runlength
          col.runLength = (~length) - 1;
        } else {
          col.prvLength = length;
          col.runLength = 0;
        }
      }
    }
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