@Override
  public OperatorContext getOperatorContext() {
    return operatorContext;
  }
Represent whether there are more tsBlocks from ith child operator. If all elements in
noMoreTsBlocks[] are true and inputTsBlocks[] are consumed completely, this operator is
finished.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/operator/process/last/LastQueryMergeOperator.java