public static ChunkRange all() {
        return new ChunkRange(null, null);
    }
Returns a {@link ChunkRange} which represents a full table scan with unbounded chunk start
and chunk end.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/mysql-cdc/src/main/java/org/apache/inlong/sort/cdc/mysql/source/assigners/ChunkRange.java