private static boolean mayContainNull(ColumnChunkMetaData meta) {
    return meta.getStatistics() == null || meta.getStatistics().getNumNulls() != 0;
  }
Test whether the dictionaries for a row group may contain records that match the expression.

@param fileSchema schema for the Parquet file
@param dictionaries a dictionary page read store
@return false if the file cannot contain rows that match the expression, true otherwise.
amoro-format-mixed/amoro-mixed-hive/src/main/java/org/apache/iceberg/parquet/AdaptHiveParquetDictionaryRowGroupFilter.java