public static String parseDeleteSign(RowKind rowKind) {
        if (RowKind.INSERT.equals(rowKind) || RowKind.UPDATE_AFTER.equals(rowKind)) {
            return "0";
        } else if (RowKind.DELETE.equals(rowKind) || RowKind.UPDATE_BEFORE.equals(rowKind)) {
            return "1";
        } else {
            throw new RuntimeException("Unrecognized row kind: " + rowKind.toString());
        }
    }
A utility function used to determine the DORIS_DELETE_SIGN for a row change.

@param rowKind the row change
@return the doris delete sign corresponding to the change
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/doris/src/main/java/org/apache/inlong/sort/doris/util/DorisParseUtils.java