@Override
  public long calculateRetainedSizeAfterCallingNext() {
    return inputOperator.calculateRetainedSizeAfterCallingNext();
  }
Return the TsBlock that contains both initial input columns and columns of common
subexpressions after filtering.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/operator/process/FilterAndProjectOperator.java