@Override
  protected void processCurrentInputTsBlock(int currentInputIndex) {
    mergeSortHeap.push(new MergeSortKey(inputTsBlocks[currentInputIndex], 0, currentInputIndex));
  }
@param currentInputIndex index of the input TsBlock
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/operator/process/MergeSortOperator.java