ABAP Select data from SAP table WBBL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WBBL
*  INTO TABLE @DATA(IT_WBBL2).
*--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_WBBL INDEX 1 INTO DATA(WA_WBBL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WBBL>-MANDT = 1.
<WBBL>-LOCNR = 1.
<WBBL>-BBTYP = 1.
<WBBL>-VERSNR = 1.
<WBBL>-BBGNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WBBL-BSORT, sy-vline,
  WA_WBBL-PGNUM, sy-vline,
  WA_WBBL-LAYGR, sy-vline,
  WA_WBBL-LTEXT, sy-vline,
  WA_WBBL-LAYVR, sy-vline,
  WA_WBBL-LNGLV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WBBL 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_WBBL 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_WBBL INTO WA_WBBL.


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

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WBBL-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WBBL-LIFNR.
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_WBBL_STR, 
MANDT TYPE STRING,
LOCNR TYPE STRING,
BBTYP TYPE STRING,
VERSNR TYPE STRING,
BBGNO TYPE STRING,
BSORT TYPE STRING,
PGNUM TYPE STRING,
LAYGR TYPE STRING,
LTEXT TYPE STRING,
LAYVR TYPE STRING,
LNGLV TYPE STRING,
LBTXT TYPE STRING,
ABTNR TYPE STRING,
ABTTX TYPE STRING,
LIFNR TYPE STRING,
LTSNR TYPE STRING,
MATKL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WBBL_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_WBBL_STR-MANDT sy-vline 
WA_WBBL_STR-LOCNR sy-vline 
WA_WBBL_STR-BBTYP sy-vline 
WA_WBBL_STR-VERSNR sy-vline 
WA_WBBL_STR-BBGNO sy-vline 
WA_WBBL_STR-BSORT sy-vline 
WA_WBBL_STR-PGNUM sy-vline 
WA_WBBL_STR-LAYGR sy-vline 
WA_WBBL_STR-LTEXT sy-vline 
WA_WBBL_STR-LAYVR sy-vline 
WA_WBBL_STR-LNGLV sy-vline 
WA_WBBL_STR-LBTXT sy-vline 
WA_WBBL_STR-ABTNR sy-vline 
WA_WBBL_STR-ABTTX sy-vline 
WA_WBBL_STR-LIFNR sy-vline 
WA_WBBL_STR-LTSNR sy-vline 
WA_WBBL_STR-MATKL sy-vline      INTO ld_text SEPARATED BY SPACE.

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