ABAP Select data from SAP table SKB1_FS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SKB1_FS 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 SKB1_FS. 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 SKB1_FS 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_SKB1_FS TYPE STANDARD TABLE OF SKB1_FS,
      WA_SKB1_FS TYPE SKB1_FS,
      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: <SKB1_FS> TYPE SKB1_FS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_SKB1_FS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SKB1_FS
  INTO TABLE IT_SKB1_FS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SKB1_FS
*  INTO TABLE @DATA(IT_SKB1_FS2).
*--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_SKB1_FS INDEX 1 INTO DATA(WA_SKB1_FS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SKB1_FS ASSIGNING <SKB1_FS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SKB1_FS>-BUSAB = 1.
<SKB1_FS>-ERDAT = 1.
<SKB1_FS>-ERNAM = 1.
<SKB1_FS>-FDGRV = 1.
<SKB1_FS>-FDLEV = 1.

ENDLOOP.

LOOP AT IT_SKB1_FS INTO WA_SKB1_FS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SKB1_FS-FSTAG, sy-vline,
  WA_SKB1_FS-MITKZ, sy-vline,
  WA_SKB1_FS-MWSKZ, sy-vline,
  WA_SKB1_FS-VZSKZ, sy-vline,
  WA_SKB1_FS-WAERS, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_SKB1_FS 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_SKB1_FS 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_SKB1_FS INTO WA_SKB1_FS.


*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 FDGRV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SKB1_FS-FDGRV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SKB1_FS-FDGRV.
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_SKB1_FS_STR, 
BUSAB TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
FDGRV TYPE STRING,
FDLEV TYPE STRING,
FSTAG TYPE STRING,
MITKZ TYPE STRING,
MWSKZ TYPE STRING,
VZSKZ TYPE STRING,
WAERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SKB1_FS_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_SKB1_FS_STR-BUSAB sy-vline 
WA_SKB1_FS_STR-ERDAT sy-vline 
WA_SKB1_FS_STR-ERNAM sy-vline 
WA_SKB1_FS_STR-FDGRV sy-vline 
WA_SKB1_FS_STR-FDLEV sy-vline 
WA_SKB1_FS_STR-FSTAG sy-vline 
WA_SKB1_FS_STR-MITKZ sy-vline 
WA_SKB1_FS_STR-MWSKZ sy-vline 
WA_SKB1_FS_STR-VZSKZ sy-vline 
WA_SKB1_FS_STR-WAERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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