ABAP Select data from SAP table SEKWS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SEKWS
*  INTO TABLE @DATA(IT_SEKWS2).
*--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_SEKWS INDEX 1 INTO DATA(WA_SEKWS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SEKWS>-EBELN = 1.
<SEKWS>-EBELP = 1.
<SEKWS>-LFBJA = 1.
<SEKWS>-LFBNR = 1.
<SEKWS>-LFPOS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SEKWS-CURTP, sy-vline,
  WA_SEKWS-ZEKKN, sy-vline,
  WA_SEKWS-KZZUG, sy-vline,
  WA_SEKWS-MATNR, sy-vline,
  WA_SEKWS-WERKS, sy-vline,
  WA_SEKWS-WWMNG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SEKWS 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_SEKWS 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_SEKWS INTO WA_SEKWS.


*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 EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SEKWS-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SEKWS-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field LFBJA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_SEKWS-LFBJA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SEKWS-LFBJA.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_SEKWS-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SEKWS-MATNR.
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_SEKWS_STR, 
EBELN TYPE STRING,
EBELP TYPE STRING,
LFBJA TYPE STRING,
LFBNR TYPE STRING,
LFPOS TYPE STRING,
CURTP TYPE STRING,
ZEKKN TYPE STRING,
KZZUG TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
WWMNG TYPE STRING,
BPWWM TYPE STRING,
WEWRT TYPE STRING,
REMNG TYPE STRING,
BPREM TYPE STRING,
REWRT TYPE STRING,
AREWR TYPE STRING,
NETWR TYPE STRING,
WAERS TYPE STRING,
KDIFF_TP TYPE STRING,
REMNG_ABD TYPE STRING,
WWMNG_ABD TYPE STRING,
BPREM_ABD TYPE STRING,
BPWWM_ABD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SEKWS_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_SEKWS_STR-EBELN sy-vline 
WA_SEKWS_STR-EBELP sy-vline 
WA_SEKWS_STR-LFBJA sy-vline 
WA_SEKWS_STR-LFBNR sy-vline 
WA_SEKWS_STR-LFPOS sy-vline 
WA_SEKWS_STR-CURTP sy-vline 
WA_SEKWS_STR-ZEKKN sy-vline 
WA_SEKWS_STR-KZZUG sy-vline 
WA_SEKWS_STR-MATNR sy-vline 
WA_SEKWS_STR-WERKS sy-vline 
WA_SEKWS_STR-WWMNG sy-vline 
WA_SEKWS_STR-BPWWM sy-vline 
WA_SEKWS_STR-WEWRT sy-vline 
WA_SEKWS_STR-REMNG sy-vline 
WA_SEKWS_STR-BPREM sy-vline 
WA_SEKWS_STR-REWRT sy-vline 
WA_SEKWS_STR-AREWR sy-vline 
WA_SEKWS_STR-NETWR sy-vline 
WA_SEKWS_STR-WAERS sy-vline 
WA_SEKWS_STR-KDIFF_TP sy-vline 
WA_SEKWS_STR-REMNG_ABD sy-vline 
WA_SEKWS_STR-WWMNG_ABD sy-vline 
WA_SEKWS_STR-BPREM_ABD sy-vline 
WA_SEKWS_STR-BPWWM_ABD sy-vline      INTO ld_text SEPARATED BY SPACE.

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