ABAP Select data from SAP table WES_S_FILTER_AKTNR_WAKH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WES_S_FILTER_AKTNR_WAKH
*  INTO TABLE @DATA(IT_WES_S_FILTER_AKTNR_WAKH2).
*--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_WES_S_FILTER_AKTNR_WAKH INDEX 1 INTO DATA(WA_WES_S_FILTER_AKTNR_WAKH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WES_S_FILTER_AKTNR_WAKH>-AKTNR = 1.
<WES_S_FILTER_AKTNR_WAKH>-AKTYP = 1.
<WES_S_FILTER_AKTNR_WAKH>-AKART = 1.
<WES_S_FILTER_AKTNR_WAKH>-WAELA = 1.
<WES_S_FILTER_AKTNR_WAKH>-AKVST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WES_S_FILTER_AKTNR_WAKH-AKAST, sy-vline,
  WA_WES_S_FILTER_AKTNR_WAKH-AKBST, sy-vline,
  WA_WES_S_FILTER_AKTNR_WAKH-VKGST, sy-vline,
  WA_WES_S_FILTER_AKTNR_WAKH-EKGST, sy-vline,
  WA_WES_S_FILTER_AKTNR_WAKH-BEKST, sy-vline,
  WA_WES_S_FILTER_AKTNR_WAKH-EKDAB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WES_S_FILTER_AKTNR_WAKH 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_WES_S_FILTER_AKTNR_WAKH 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_WES_S_FILTER_AKTNR_WAKH INTO WA_WES_S_FILTER_AKTNR_WAKH.


*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_WES_S_FILTER_AKTNR_WAKH-AKTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WES_S_FILTER_AKTNR_WAKH-AKTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REF_PROMO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WES_S_FILTER_AKTNR_WAKH-REF_PROMO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WES_S_FILTER_AKTNR_WAKH-REF_PROMO.
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_WES_S_FILTER_AKTNR_WAKH_STR, 
AKTNR TYPE STRING,
AKTYP TYPE STRING,
AKART TYPE STRING,
WAELA TYPE STRING,
AKVST TYPE STRING,
AKAST TYPE STRING,
AKBST TYPE STRING,
VKGST TYPE STRING,
EKGST TYPE STRING,
BEKST TYPE STRING,
EKDAB TYPE STRING,
EKDBI TYPE STRING,
VKDAB TYPE STRING,
VKDBI TYPE STRING,
ALIVO TYPE STRING,
ALIBI TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
FADAT TYPE STRING,
SADAT TYPE STRING,
FLDAT TYPE STRING,
SLDAT TYPE STRING,
PLTYP TYPE STRING,
ERAPPL TYPE STRING,
MEDIA_TYPE TYPE STRING,
CUSTOMER_TYPE TYPE STRING,
REF_PROMO TYPE STRING,
IS_REF_PROMO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WES_S_FILTER_AKTNR_WAKH_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_WES_S_FILTER_AKTNR_WAKH_STR-AKTNR sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-AKTYP sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-AKART sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-WAELA sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-AKVST sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-AKAST sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-AKBST sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-VKGST sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-EKGST sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-BEKST sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-EKDAB sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-EKDBI sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-VKDAB sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-VKDBI sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-ALIVO sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-ALIBI sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-EKORG sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-EKGRP sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-VKORG sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-VTWEG sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-FADAT sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-SADAT sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-FLDAT sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-SLDAT sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-PLTYP sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-ERAPPL sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-MEDIA_TYPE sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-CUSTOMER_TYPE sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-REF_PROMO sy-vline 
WA_WES_S_FILTER_AKTNR_WAKH_STR-IS_REF_PROMO sy-vline      INTO ld_text SEPARATED BY SPACE.

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