ABAP Select data from SAP table FKKRD_LINK into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKRD_LINK
*  INTO TABLE @DATA(IT_FKKRD_LINK2).
*--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_FKKRD_LINK INDEX 1 INTO DATA(WA_FKKRD_LINK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKRD_LINK>-LAUFD = 1.
<FKKRD_LINK>-LAUFI = 1.
<FKKRD_LINK>-OPBEL = 1.
<FKKRD_LINK>-OPUPW = 1.
<FKKRD_LINK>-OPUPK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKRD_LINK-OPUPZ, sy-vline,
  WA_FKKRD_LINK-CORRECT, sy-vline,
  WA_FKKRD_LINK-FINRE, sy-vline,
  WA_FKKRD_LINK-GPART_DIS, sy-vline,
  WA_FKKRD_LINK-VKONT_DIS, sy-vline,
  WA_FKKRD_LINK-VTREF_DIS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKRD_LINK 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_FKKRD_LINK 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_FKKRD_LINK INTO WA_FKKRD_LINK.


*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_FKKRD_LINK-OPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKRD_LINK-OPBEL.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field VTREF_DIS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKRD_LINK-VTREF_DIS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKRD_LINK-VTREF_DIS.
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_FKKRD_LINK_STR, 
LAUFD TYPE STRING,
LAUFI TYPE STRING,
OPBEL TYPE STRING,
OPUPW TYPE STRING,
OPUPK TYPE STRING,
OPUPZ TYPE STRING,
CORRECT TYPE STRING,
FINRE TYPE STRING,
GPART_DIS TYPE STRING,
VKONT_DIS TYPE STRING,
VTREF_DIS TYPE STRING,
SUBAP_DIS TYPE STRING,
WAERS TYPE STRING,
INDX TYPE STRING,
BETRW TYPE STRING,
XSHKZ TYPE STRING,
HVORG TYPE STRING,
TVORG TYPE STRING,
BUKRS TYPE STRING,
XNEGP TYPE STRING,
DISTYP TYPE STRING,
DISPER TYPE STRING,
PERSL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKRD_LINK_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_FKKRD_LINK_STR-LAUFD sy-vline 
WA_FKKRD_LINK_STR-LAUFI sy-vline 
WA_FKKRD_LINK_STR-OPBEL sy-vline 
WA_FKKRD_LINK_STR-OPUPW sy-vline 
WA_FKKRD_LINK_STR-OPUPK sy-vline 
WA_FKKRD_LINK_STR-OPUPZ sy-vline 
WA_FKKRD_LINK_STR-CORRECT sy-vline 
WA_FKKRD_LINK_STR-FINRE sy-vline 
WA_FKKRD_LINK_STR-GPART_DIS sy-vline 
WA_FKKRD_LINK_STR-VKONT_DIS sy-vline 
WA_FKKRD_LINK_STR-VTREF_DIS sy-vline 
WA_FKKRD_LINK_STR-SUBAP_DIS sy-vline 
WA_FKKRD_LINK_STR-WAERS sy-vline 
WA_FKKRD_LINK_STR-INDX sy-vline 
WA_FKKRD_LINK_STR-BETRW sy-vline 
WA_FKKRD_LINK_STR-XSHKZ sy-vline 
WA_FKKRD_LINK_STR-HVORG sy-vline 
WA_FKKRD_LINK_STR-TVORG sy-vline 
WA_FKKRD_LINK_STR-BUKRS sy-vline 
WA_FKKRD_LINK_STR-XNEGP sy-vline 
WA_FKKRD_LINK_STR-DISTYP sy-vline 
WA_FKKRD_LINK_STR-DISPER sy-vline 
WA_FKKRD_LINK_STR-PERSL sy-vline      INTO ld_text SEPARATED BY SPACE.

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