Update Updates field in spring data JPA, if the original field value is null not processed, NOT NULL then a string is added to the original value

Example code:

/**      * If the barcode field value is NULL then do not process     * If the barcode field value is not null before the original value of the     Mosaic del:@param  dealer      @return     *    /@Modifying @Transactional    @Query ("update Dealer D set "+            " D.deleteflag = 1, "+            " D.barcode = case when D.barcode was NULL then D.barcode ELSE CONCAT (' d El: ', D.barcode) end, "+            " D.outerid = case when D.outerid was NULL then D.outerid ELSE CONCAT (' del: ', D.outerid) end "+            " where D.uid =: #{#dealer. UID} ")    int fakedelete (@Param (" dealer ") dealer dealer);

Update Updates field in spring data JPA, if the original field value is null not processed, NOT NULL then a string is added to the original value