ABAP Select data from SAP table WLBMD into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WLBMD
*  INTO TABLE @DATA(IT_WLBMD2).
*--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_WLBMD INDEX 1 INTO DATA(WA_WLBMD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WLBMD>-MANDT = 1.
<WLBMD>-LAYVR = 1.
<WLBMD>-LBRNR = 1.
<WLBMD>-SORF1 = 1.
<WLBMD>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WLBMD-MEINH, sy-vline,
  WA_WLBMD-SORF2, sy-vline,
  WA_WLBMD-SEITE, sy-vline,
  WA_WLBMD-ABBNR, sy-vline,
  WA_WLBMD-ANTEI, sy-vline,
  WA_WLBMD-ATTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WLBMD 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_WLBMD 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_WLBMD INTO WA_WLBMD.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WLBMD-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WLBMD-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WLBMD-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WLBMD-MEINH.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit MATN1, internal->external for field PMATA
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WLBMD-PMATA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WLBMD-PMATA.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MEANT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WLBMD-MEANT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WLBMD-MEANT.
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_WLBMD_STR, 
MANDT TYPE STRING,
LAYVR TYPE STRING,
LBRNR TYPE STRING,
SORF1 TYPE STRING,
MATNR TYPE STRING,
MEINH TYPE STRING,
SORF2 TYPE STRING,
SEITE TYPE STRING,
ABBNR TYPE STRING,
ANTEI TYPE STRING,
ATTYP TYPE STRING,
S1UEB TYPE STRING,
ATBNR TYPE STRING,
SELKZ TYPE STRING,
UPDKZ TYPE STRING,
DOCKZ TYPE STRING,
MAKTX TYPE STRING,
KZDOK TYPE STRING,
KZTXT TYPE STRING,
KBETR TYPE STRING,
KONWA TYPE STRING,
KFEHL TYPE STRING,
KFEHL_ICON TYPE STRING,
VISIBLEPOS TYPE STRING,
PMATA TYPE STRING,
KMPMG TYPE STRING,
CUOBF TYPE STRING,
HIERARCHY TYPE STRING,
AKTNR TYPE STRING,
MEANT TYPE STRING,
BFLME TYPE STRING,
ABETR TYPE STRING,
KONWA_PROM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WLBMD_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_WLBMD_STR-MANDT sy-vline 
WA_WLBMD_STR-LAYVR sy-vline 
WA_WLBMD_STR-LBRNR sy-vline 
WA_WLBMD_STR-SORF1 sy-vline 
WA_WLBMD_STR-MATNR sy-vline 
WA_WLBMD_STR-MEINH sy-vline 
WA_WLBMD_STR-SORF2 sy-vline 
WA_WLBMD_STR-SEITE sy-vline 
WA_WLBMD_STR-ABBNR sy-vline 
WA_WLBMD_STR-ANTEI sy-vline 
WA_WLBMD_STR-ATTYP sy-vline 
WA_WLBMD_STR-S1UEB sy-vline 
WA_WLBMD_STR-ATBNR sy-vline 
WA_WLBMD_STR-SELKZ sy-vline 
WA_WLBMD_STR-UPDKZ sy-vline 
WA_WLBMD_STR-DOCKZ sy-vline 
WA_WLBMD_STR-MAKTX sy-vline 
WA_WLBMD_STR-KZDOK sy-vline 
WA_WLBMD_STR-KZTXT sy-vline 
WA_WLBMD_STR-KBETR sy-vline 
WA_WLBMD_STR-KONWA sy-vline 
WA_WLBMD_STR-KFEHL sy-vline 
WA_WLBMD_STR-KFEHL_ICON sy-vline 
WA_WLBMD_STR-VISIBLEPOS sy-vline 
WA_WLBMD_STR-PMATA sy-vline 
WA_WLBMD_STR-KMPMG sy-vline 
WA_WLBMD_STR-CUOBF sy-vline 
WA_WLBMD_STR-HIERARCHY sy-vline 
WA_WLBMD_STR-AKTNR sy-vline 
WA_WLBMD_STR-MEANT sy-vline 
WA_WLBMD_STR-BFLME sy-vline 
WA_WLBMD_STR-ABETR sy-vline 
WA_WLBMD_STR-KONWA_PROM sy-vline      INTO ld_text SEPARATED BY SPACE.

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