default long calculateMaxPeekMemoryWithCounter() {
    long maxPeekMemory = calculateMaxPeekMemory();
    getOperatorContext().setEstimatedMemorySize(maxPeekMemory);
    return maxPeekMemory;
  }
Gets next tsBlock from this operator. If no data is currently available, return null.

@throws Exception Error happened while fetching next batch
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/operator/Operator.java