ABAP Select data from SAP table /KYK/S_POWL_BILLDOC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /KYK/S_POWL_BILLDOC 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 /KYK/S_POWL_BILLDOC. 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 /KYK/S_POWL_BILLDOC 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_/KYK/S_POWL_BILLDOC TYPE STANDARD TABLE OF /KYK/S_POWL_BILLDOC,
      WA_/KYK/S_POWL_BILLDOC TYPE /KYK/S_POWL_BILLDOC,
      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: </KYK/S_POWL_BILLDOC> TYPE /KYK/S_POWL_BILLDOC.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /KYK/S_POWL_BILLDOC
  INTO TABLE IT_/KYK/S_POWL_BILLDOC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /KYK/S_POWL_BILLDOC
*  INTO TABLE @DATA(IT_/KYK/S_POWL_BILLDOC2).
*--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_/KYK/S_POWL_BILLDOC INDEX 1 INTO DATA(WA_/KYK/S_POWL_BILLDOC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/KYK/S_POWL_BILLDOC ASSIGNING </KYK/S_POWL_BILLDOC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</KYK/S_POWL_BILLDOC>-FKART = 1.
</KYK/S_POWL_BILLDOC>-KUNAG = 1.
</KYK/S_POWL_BILLDOC>-KUNRG = 1.
</KYK/S_POWL_BILLDOC>-FKDAT = 1.
</KYK/S_POWL_BILLDOC>-VKORG = 1.

ENDLOOP.

LOOP AT IT_/KYK/S_POWL_BILLDOC INTO WA_/KYK/S_POWL_BILLDOC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/KYK/S_POWL_BILLDOC-VTWEG, sy-vline,
  WA_/KYK/S_POWL_BILLDOC-FKTYP, sy-vline,
  WA_/KYK/S_POWL_BILLDOC-VBELN, sy-vline,
  WA_/KYK/S_POWL_BILLDOC-VBTYP, sy-vline,
  WA_/KYK/S_POWL_BILLDOC-RFBSK, sy-vline,
  WA_/KYK/S_POWL_BILLDOC-ERNAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/KYK/S_POWL_BILLDOC 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_/KYK/S_POWL_BILLDOC 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_/KYK/S_POWL_BILLDOC INTO WA_/KYK/S_POWL_BILLDOC.


*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 KUNAG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/S_POWL_BILLDOC-KUNAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/S_POWL_BILLDOC-KUNAG.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/S_POWL_BILLDOC-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/S_POWL_BILLDOC-VBELN.
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_/KYK/S_POWL_BILLDOC_STR, 
FKART TYPE STRING,
KUNAG TYPE STRING,
KUNRG TYPE STRING,
FKDAT TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
FKTYP TYPE STRING,
VBELN TYPE STRING,
VBTYP TYPE STRING,
RFBSK TYPE STRING,
ERNAM TYPE STRING,
NETWR TYPE STRING,
WAERK TYPE STRING,
MWSBK TYPE STRING,
TEXT_FKART TYPE STRING,
NAME_KUNAG TYPE STRING,
NAME_KUNRG TYPE STRING,
TEXT_VKORG TYPE STRING,
TEXT_VTWEG TYPE STRING,
TEXT_FKTYP TYPE STRING,
TEXT_VBTYP TYPE STRING,
TEXT_RFBSK TYPE STRING,
TEXT_WAERK TYPE STRING,
VSTEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/KYK/S_POWL_BILLDOC_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_/KYK/S_POWL_BILLDOC_STR-FKART sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-KUNAG sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-KUNRG sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-FKDAT sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-VKORG sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-VTWEG sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-FKTYP sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-VBELN sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-VBTYP sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-RFBSK sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-ERNAM sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-NETWR sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-WAERK sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-MWSBK sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-TEXT_FKART sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-NAME_KUNAG sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-NAME_KUNRG sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-TEXT_VKORG sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-TEXT_VTWEG sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-TEXT_FKTYP sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-TEXT_VBTYP sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-TEXT_RFBSK sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-TEXT_WAERK sy-vline 
WA_/KYK/S_POWL_BILLDOC_STR-VSTEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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