ABAP Select data from SAP table CACS_S_WFPFNR_WFMGCS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CACS_S_WFPFNR_WFMGCS table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to CACS_S_WFPFNR_WFMGCS. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the CACS_S_WFPFNR_WFMGCS table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_CACS_S_WFPFNR_WFMGCS TYPE STANDARD TABLE OF CACS_S_WFPFNR_WFMGCS,
      WA_CACS_S_WFPFNR_WFMGCS TYPE CACS_S_WFPFNR_WFMGCS,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <CACS_S_WFPFNR_WFMGCS> TYPE CACS_S_WFPFNR_WFMGCS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CACS_S_WFPFNR_WFMGCS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CACS_S_WFPFNR_WFMGCS
  INTO TABLE IT_CACS_S_WFPFNR_WFMGCS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CACS_S_WFPFNR_WFMGCS
*  INTO TABLE @DATA(IT_CACS_S_WFPFNR_WFMGCS2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_CACS_S_WFPFNR_WFMGCS INDEX 1 INTO DATA(WA_CACS_S_WFPFNR_WFMGCS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CACS_S_WFPFNR_WFMGCS ASSIGNING <CACS_S_WFPFNR_WFMGCS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CACS_S_WFPFNR_WFMGCS>-MANDT = 1.
<CACS_S_WFPFNR_WFMGCS>-APPL = 1.
<CACS_S_WFPFNR_WFMGCS>-EXT_RUN_ID = 1.
<CACS_S_WFPFNR_WFMGCS>-PFNR = 1.
<CACS_S_WFPFNR_WFMGCS>-MSGTY = 1.

ENDLOOP.

LOOP AT IT_CACS_S_WFPFNR_WFMGCS INTO WA_CACS_S_WFPFNR_WFMGCS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CACS_S_WFPFNR_WFMGCS-MSGNO, sy-vline,
  WA_CACS_S_WFPFNR_WFMGCS-MSGID, sy-vline,
  WA_CACS_S_WFPFNR_WFMGCS-STATUSWORK, sy-vline,
  WA_CACS_S_WFPFNR_WFMGCS-MSGGRPID, sy-vline,
  WA_CACS_S_WFPFNR_WFMGCS-PRIOTY, sy-vline,
  WA_CACS_S_WFPFNR_WFMGCS-AGDTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CACS_S_WFPFNR_WFMGCS you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_CACS_S_WFPFNR_WFMGCS TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_CACS_S_WFPFNR_WFMGCS INTO WA_CACS_S_WFPFNR_WFMGCS.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field EXT_RUN_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CACS_S_WFPFNR_WFMGCS-EXT_RUN_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CACS_S_WFPFNR_WFMGCS-EXT_RUN_ID.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CACS_S_WFPFNR_WFMGCS_STR, 
MANDT TYPE STRING,
APPL TYPE STRING,
EXT_RUN_ID TYPE STRING,
PFNR TYPE STRING,
MSGTY TYPE STRING,
MSGNO TYPE STRING,
MSGID TYPE STRING,
STATUSWORK TYPE STRING,
MSGGRPID TYPE STRING,
PRIOTY TYPE STRING,
AGDTY TYPE STRING,
WFAGENT TYPE STRING,
MAXCNT TYPE STRING,
MAXSHARE TYPE STRING,
ADMAGENT TYPE STRING,
DEFLT TYPE STRING,
TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CACS_S_WFPFNR_WFMGCS_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_CACS_S_WFPFNR_WFMGCS_STR-MANDT sy-vline 
WA_CACS_S_WFPFNR_WFMGCS_STR-APPL sy-vline 
WA_CACS_S_WFPFNR_WFMGCS_STR-EXT_RUN_ID sy-vline 
WA_CACS_S_WFPFNR_WFMGCS_STR-PFNR sy-vline 
WA_CACS_S_WFPFNR_WFMGCS_STR-MSGTY sy-vline 
WA_CACS_S_WFPFNR_WFMGCS_STR-MSGNO sy-vline 
WA_CACS_S_WFPFNR_WFMGCS_STR-MSGID sy-vline 
WA_CACS_S_WFPFNR_WFMGCS_STR-STATUSWORK sy-vline 
WA_CACS_S_WFPFNR_WFMGCS_STR-MSGGRPID sy-vline 
WA_CACS_S_WFPFNR_WFMGCS_STR-PRIOTY sy-vline 
WA_CACS_S_WFPFNR_WFMGCS_STR-AGDTY sy-vline 
WA_CACS_S_WFPFNR_WFMGCS_STR-WFAGENT sy-vline 
WA_CACS_S_WFPFNR_WFMGCS_STR-MAXCNT sy-vline 
WA_CACS_S_WFPFNR_WFMGCS_STR-MAXSHARE sy-vline 
WA_CACS_S_WFPFNR_WFMGCS_STR-ADMAGENT sy-vline 
WA_CACS_S_WFPFNR_WFMGCS_STR-DEFLT sy-vline 
WA_CACS_S_WFPFNR_WFMGCS_STR-TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.