private static Date convertDate(long days) {
        LocalDate localDate = LocalDate.ofEpochDay(days);
        return Date.valueOf(localDate);
    }
Runtime converter that converts objects of Flink Table & SQL internal data structures to
corresponding {@link Object}s.
inlong-sort/sort-formats/format-rowdata/format-rowdata-base/src/main/java/org/apache/inlong/sort/formats/base/RowDataToFieldConverters.java