Generic Data Source Based On Function Module (Delta capable)

Question

Hi,
My requirement is to develop a Generic Extractor based on Function Module (Delta capable). As I already found many threads explaining this concept, but most of them discussing FM RSAX_BIW_GET_DATA_SIMPLE with Extraction Method F2. There is another FM RSAX_BIW_GET_DATA which, one can use to build delta enabled extractor.
Although I do have some doubts:
what is the E_T_SOURCE_STRUCTURE_NAME ?
read table i_t_select into l_s_select with key fieldnm = 'PGMID'. Use of this code ?
Templet only showing
case i_updmode.
      when 'F'.
      when others.
        if 1 = 2. message e011(r3). endif.
        log_write 'E'                  "message type
                  'R3'                 "message class
                  '011'                "message number
                  i_updmode            "message variable 1
                  ' '.                 "message variable 2
        raise error_passed_to_mess_handler.
    endcase.
i.upmode as F, D(delta) is not included, do i need to include this?
Can someone help to solve this. Appropriate points will be allotted to helpful suggestions.
Edited by: Debjit_Singha_86 on Jul 23, 2011 8:35 AM

Answer 1

Try using following piece of code;
READ TABLE g_t_select INTO l_s_select
                             WITH KEY fieldnm = 'Date Field for Delta'.
      IF sy-subrc EQ 0.
SELECT SINGLE *
                       FROM ROOSGENDLM
                       WHERE oltpsource EQ 'DataSource Nameu2019
                       AND slogsys      EQ lw_slogsys.
          IF sy-subrc EQ 0.                                            
            lw_date = roosgendlm-deltaid+0(8).
            lw_time = roosgendlm-deltaid+8(6).
                                                                                ENDIF.                       " IF SY-SUBRC EQ 0.
ENDIF.
OPEN CURSOR WITH HOLD S_CURSOR FOR
SELECT * FROM TABLE
                               WHERE  CPUDT     GE   lw_date   AND
                                           CPUTIME  GE   lw_time.
    ENDIF.                            
Table R00SGEMDLM stores the date and time data was last extracted from a data source.
Alternatively, you can also try using the i_updmode.
When 'F'.
SELECT * FROM TABLE (without any where clause on last change date)
When 'D'
SELECT * FROM TABLE
                               WHERE  CPUDT     GE   lw_date   AND
                                           CPUTIME  GE   lw_time.
These are just suggestions. Try these out, I hope it helps.
Regards,
Gaurav