ABAP Select data from SAP table FKKFA_OP_LINK_ENH into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FKKFA_OP_LINK_ENH 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 FKKFA_OP_LINK_ENH. 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 FKKFA_OP_LINK_ENH 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_FKKFA_OP_LINK_ENH TYPE STANDARD TABLE OF FKKFA_OP_LINK_ENH,
      WA_FKKFA_OP_LINK_ENH TYPE FKKFA_OP_LINK_ENH,
      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: <FKKFA_OP_LINK_ENH> TYPE FKKFA_OP_LINK_ENH.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKFA_OP_LINK_ENH
*  INTO TABLE @DATA(IT_FKKFA_OP_LINK_ENH2).
*--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_FKKFA_OP_LINK_ENH INDEX 1 INTO DATA(WA_FKKFA_OP_LINK_ENH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKFA_OP_LINK_ENH>-OPBEL = 1.
<FKKFA_OP_LINK_ENH>-OPUPW = 1.
<FKKFA_OP_LINK_ENH>-OPUPK = 1.
<FKKFA_OP_LINK_ENH>-OPUPZ = 1.
<FKKFA_OP_LINK_ENH>-OPUPF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKFA_OP_LINK_ENH-FASTA, sy-vline,
  WA_FKKFA_OP_LINK_ENH-PASTA, sy-vline,
  WA_FKKFA_OP_LINK_ENH-GPART, sy-vline,
  WA_FKKFA_OP_LINK_ENH-VKONT, sy-vline,
  WA_FKKFA_OP_LINK_ENH-BUKRS, sy-vline,
  WA_FKKFA_OP_LINK_ENH-INDEX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKFA_OP_LINK_ENH 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_FKKFA_OP_LINK_ENH 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_FKKFA_OP_LINK_ENH INTO WA_FKKFA_OP_LINK_ENH.


*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 OPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKFA_OP_LINK_ENH-OPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKFA_OP_LINK_ENH-OPBEL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKFA_OP_LINK_ENH-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKFA_OP_LINK_ENH-VKONT.
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_FKKFA_OP_LINK_ENH_STR, 
OPBEL TYPE STRING,
OPUPW TYPE STRING,
OPUPK TYPE STRING,
OPUPZ TYPE STRING,
OPUPF TYPE STRING,
FASTA TYPE STRING,
PASTA TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
BUKRS TYPE STRING,
INDEX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKFA_OP_LINK_ENH_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_FKKFA_OP_LINK_ENH_STR-OPBEL sy-vline 
WA_FKKFA_OP_LINK_ENH_STR-OPUPW sy-vline 
WA_FKKFA_OP_LINK_ENH_STR-OPUPK sy-vline 
WA_FKKFA_OP_LINK_ENH_STR-OPUPZ sy-vline 
WA_FKKFA_OP_LINK_ENH_STR-OPUPF sy-vline 
WA_FKKFA_OP_LINK_ENH_STR-FASTA sy-vline 
WA_FKKFA_OP_LINK_ENH_STR-PASTA sy-vline 
WA_FKKFA_OP_LINK_ENH_STR-GPART sy-vline 
WA_FKKFA_OP_LINK_ENH_STR-VKONT sy-vline 
WA_FKKFA_OP_LINK_ENH_STR-BUKRS sy-vline 
WA_FKKFA_OP_LINK_ENH_STR-INDEX sy-vline      INTO ld_text SEPARATED BY SPACE.

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