ABAP Select data from SAP table LBKEY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LBKEY
*  INTO TABLE @DATA(IT_LBKEY2).
*--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_LBKEY INDEX 1 INTO DATA(WA_LBKEY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LBKEY>-MATNR = 1.
<LBKEY>-WERKS = 1.
<LBKEY>-LGORT = 1.
<LBKEY>-CHARG = 1.
<LBKEY>-BESTQ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LBKEY-SOBKZ, sy-vline,
  WA_LBKEY-SONUM, sy-vline,
  WA_LBKEY-UMMAT, sy-vline,
  WA_LBKEY-UMWRK, sy-vline,
  WA_LBKEY-UMLGO, sy-vline,
  WA_LBKEY-UMCHA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LBKEY 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_LBKEY 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_LBKEY INTO WA_LBKEY.


*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_LBKEY-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LBKEY-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field USONU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LBKEY-USONU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LBKEY-USONU.
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_LBKEY_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
BESTQ TYPE STRING,
SOBKZ TYPE STRING,
SONUM TYPE STRING,
UMMAT TYPE STRING,
UMWRK TYPE STRING,
UMLGO TYPE STRING,
UMCHA TYPE STRING,
UMBSQ TYPE STRING,
UMSOK TYPE STRING,
USONU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LBKEY_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_LBKEY_STR-MATNR sy-vline 
WA_LBKEY_STR-WERKS sy-vline 
WA_LBKEY_STR-LGORT sy-vline 
WA_LBKEY_STR-CHARG sy-vline 
WA_LBKEY_STR-BESTQ sy-vline 
WA_LBKEY_STR-SOBKZ sy-vline 
WA_LBKEY_STR-SONUM sy-vline 
WA_LBKEY_STR-UMMAT sy-vline 
WA_LBKEY_STR-UMWRK sy-vline 
WA_LBKEY_STR-UMLGO sy-vline 
WA_LBKEY_STR-UMCHA sy-vline 
WA_LBKEY_STR-UMBSQ sy-vline 
WA_LBKEY_STR-UMSOK sy-vline 
WA_LBKEY_STR-USONU sy-vline      INTO ld_text SEPARATED BY SPACE.

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