ABAP Select data from SAP table WAFORM_AKT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WAFORM_AKT
*  INTO TABLE @DATA(IT_WAFORM_AKT2).
*--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_WAFORM_AKT INDEX 1 INTO DATA(WA_WAFORM_AKT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WAFORM_AKT>-AKTNR = 1.
<WAFORM_AKT>-BEZEI = 1.
<WAFORM_AKT>-SPDAB = 1.
<WAFORM_AKT>-SPGRU = 1.
<WAFORM_AKT>-AKVST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WAFORM_AKT-NPOSI, sy-vline,
  WA_WAFORM_AKT-NSPER, sy-vline,
  WA_WAFORM_AKT-NOBST, sy-vline,
  WA_WAFORM_AKT-NOTHE, sy-vline,
  WA_WAFORM_AKT-NOWGP, sy-vline,
  WA_WAFORM_AKT-NOWEM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WAFORM_AKT 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_WAFORM_AKT 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_WAFORM_AKT INTO WA_WAFORM_AKT.


*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 AKTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WAFORM_AKT-AKTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAFORM_AKT-AKTNR.
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_WAFORM_AKT_STR, 
AKTNR TYPE STRING,
BEZEI TYPE STRING,
SPDAB TYPE STRING,
SPGRU TYPE STRING,
AKVST TYPE STRING,
NPOSI TYPE STRING,
NSPER TYPE STRING,
NOBST TYPE STRING,
NOTHE TYPE STRING,
NOWGP TYPE STRING,
NOWEM TYPE STRING,
FLOES TYPE STRING,
FSPER TYPE STRING,
FZEAE TYPE STRING,
FWAAE TYPE STRING,
FTHZU TYPE STRING,
FWGZU TYPE STRING,
FBAAN TYPE STRING,
FWMAN TYPE STRING,
FTHLO TYPE STRING,
FWGLO TYPE STRING,
FBALO TYPE STRING,
FWMLO TYPE STRING,
NBAUS TYPE STRING,
NWGPE TYPE STRING,
NTHEM TYPE STRING,
NWERB TYPE STRING,
LIGEN TYPE STRING,
AUGEN TYPE STRING,
BEGEN TYPE STRING,
EKGEN TYPE STRING,
VKGEN TYPE STRING,
NLIGE TYPE STRING,
NAUGE TYPE STRING,
NBEGE TYPE STRING,
NEKGE TYPE STRING,
NVKGE TYPE STRING,
SPGRU_TXT TYPE STRING,
AKVST_TXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WAFORM_AKT_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_WAFORM_AKT_STR-AKTNR sy-vline 
WA_WAFORM_AKT_STR-BEZEI sy-vline 
WA_WAFORM_AKT_STR-SPDAB sy-vline 
WA_WAFORM_AKT_STR-SPGRU sy-vline 
WA_WAFORM_AKT_STR-AKVST sy-vline 
WA_WAFORM_AKT_STR-NPOSI sy-vline 
WA_WAFORM_AKT_STR-NSPER sy-vline 
WA_WAFORM_AKT_STR-NOBST sy-vline 
WA_WAFORM_AKT_STR-NOTHE sy-vline 
WA_WAFORM_AKT_STR-NOWGP sy-vline 
WA_WAFORM_AKT_STR-NOWEM sy-vline 
WA_WAFORM_AKT_STR-FLOES sy-vline 
WA_WAFORM_AKT_STR-FSPER sy-vline 
WA_WAFORM_AKT_STR-FZEAE sy-vline 
WA_WAFORM_AKT_STR-FWAAE sy-vline 
WA_WAFORM_AKT_STR-FTHZU sy-vline 
WA_WAFORM_AKT_STR-FWGZU sy-vline 
WA_WAFORM_AKT_STR-FBAAN sy-vline 
WA_WAFORM_AKT_STR-FWMAN sy-vline 
WA_WAFORM_AKT_STR-FTHLO sy-vline 
WA_WAFORM_AKT_STR-FWGLO sy-vline 
WA_WAFORM_AKT_STR-FBALO sy-vline 
WA_WAFORM_AKT_STR-FWMLO sy-vline 
WA_WAFORM_AKT_STR-NBAUS sy-vline 
WA_WAFORM_AKT_STR-NWGPE sy-vline 
WA_WAFORM_AKT_STR-NTHEM sy-vline 
WA_WAFORM_AKT_STR-NWERB sy-vline 
WA_WAFORM_AKT_STR-LIGEN sy-vline 
WA_WAFORM_AKT_STR-AUGEN sy-vline 
WA_WAFORM_AKT_STR-BEGEN sy-vline 
WA_WAFORM_AKT_STR-EKGEN sy-vline 
WA_WAFORM_AKT_STR-VKGEN sy-vline 
WA_WAFORM_AKT_STR-NLIGE sy-vline 
WA_WAFORM_AKT_STR-NAUGE sy-vline 
WA_WAFORM_AKT_STR-NBEGE sy-vline 
WA_WAFORM_AKT_STR-NEKGE sy-vline 
WA_WAFORM_AKT_STR-NVKGE sy-vline 
WA_WAFORM_AKT_STR-SPGRU_TXT sy-vline 
WA_WAFORM_AKT_STR-AKVST_TXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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