public void unselectNullPositions(Column column) {
    unselectPositions(column, false);
  }
Do not use this to filter a page, as the underlying array can change, and this will change the
page after the filtering.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/operator/source/relational/aggregation/AggregationMask.java