public static DataType fromDbzColumn(Column column) {
        DataType dataType = convertFromColumn(column);
        if (column.isOptional()) {
            return dataType;
        } else {
            return dataType.notNull();
        }
    }
Returns a corresponding Flink data type from a debezium {@link Column}.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/oracle-cdc/src/main/java/org/apache/inlong/sort/cdc/oracle/source/utils/OracleTypeUtils.java