default RowType getSplitType(Column splitColumn) {
        return (RowType) ROW(FIELD(splitColumn.name(), fromDbzColumn(splitColumn))).getLogicalType();
    }
convert dbz column to Flink row type.

@param splitColumn split column.
@return flink row type.
inlong-sort/sort-flink/cdc-base/src/main/java/org/apache/inlong/sort/cdc/base/source/assigner/splitter/JdbcSourceChunkSplitter.java