@Override
    public Optional<Integer> scale() {
        return Optional.ofNullable(scale);
    }
A implementation class of {@link Column}, which can used by {@link TableChange}
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/postgres-cdc/src/main/java/org/apache/inlong/sort/cdc/postgres/debezium/internal/ColumnImpl.java