ABAP Select data from SAP table FKKCRCL_SELSCREEN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKCRCL_SELSCREEN
*  INTO TABLE @DATA(IT_FKKCRCL_SELSCREEN2).
*--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_FKKCRCL_SELSCREEN INDEX 1 INTO DATA(WA_FKKCRCL_SELSCREEN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKCRCL_SELSCREEN>-ORG1R = 1.
<FKKCRCL_SELSCREEN>-HBKID = 1.
<FKKCRCL_SELSCREEN>-HKTID = 1.
<FKKCRCL_SELSCREEN>-ZTNUM = 1.
<FKKCRCL_SELSCREEN>-ERDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKCRCL_SELSCREEN-ERTIM, sy-vline,
  WA_FKKCRCL_SELSCREEN-DOC1R, sy-vline,
  WA_FKKCRCL_SELSCREEN-DOC2R, sy-vline,
  WA_FKKCRCL_SELSCREEN-AUBET, sy-vline,
  WA_FKKCRCL_SELSCREEN-AUWAE, sy-vline,
  WA_FKKCRCL_SELSCREEN-EIBET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKCRCL_SELSCREEN 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_FKKCRCL_SELSCREEN 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_FKKCRCL_SELSCREEN INTO WA_FKKCRCL_SELSCREEN.


*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 ZTNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKCRCL_SELSCREEN-ZTNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKCRCL_SELSCREEN-ZTNUM.
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_FKKCRCL_SELSCREEN_STR, 
ORG1R TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
ZTNUM TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
DOC1R TYPE STRING,
DOC2R TYPE STRING,
AUBET TYPE STRING,
AUWAE TYPE STRING,
EIBET TYPE STRING,
EIWAE TYPE STRING,
AUGRD TYPE STRING,
STATE TYPE STRING,
LOCK_USER TYPE STRING,
LOCK_LIMIT TYPE STRING,
WORKSTATE TYPE STRING,
RESUBMIT_DATE TYPE STRING,
WF_COUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKCRCL_SELSCREEN_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_FKKCRCL_SELSCREEN_STR-ORG1R sy-vline 
WA_FKKCRCL_SELSCREEN_STR-HBKID sy-vline 
WA_FKKCRCL_SELSCREEN_STR-HKTID sy-vline 
WA_FKKCRCL_SELSCREEN_STR-ZTNUM sy-vline 
WA_FKKCRCL_SELSCREEN_STR-ERDAT sy-vline 
WA_FKKCRCL_SELSCREEN_STR-ERTIM sy-vline 
WA_FKKCRCL_SELSCREEN_STR-DOC1R sy-vline 
WA_FKKCRCL_SELSCREEN_STR-DOC2R sy-vline 
WA_FKKCRCL_SELSCREEN_STR-AUBET sy-vline 
WA_FKKCRCL_SELSCREEN_STR-AUWAE sy-vline 
WA_FKKCRCL_SELSCREEN_STR-EIBET sy-vline 
WA_FKKCRCL_SELSCREEN_STR-EIWAE sy-vline 
WA_FKKCRCL_SELSCREEN_STR-AUGRD sy-vline 
WA_FKKCRCL_SELSCREEN_STR-STATE sy-vline 
WA_FKKCRCL_SELSCREEN_STR-LOCK_USER sy-vline 
WA_FKKCRCL_SELSCREEN_STR-LOCK_LIMIT sy-vline 
WA_FKKCRCL_SELSCREEN_STR-WORKSTATE sy-vline 
WA_FKKCRCL_SELSCREEN_STR-RESUBMIT_DATE sy-vline 
WA_FKKCRCL_SELSCREEN_STR-WF_COUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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