ABAP Select data from SAP table LABGL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LABGL
*  INTO TABLE @DATA(IT_LABGL2).
*--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_LABGL INDEX 1 INTO DATA(WA_LABGL2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LABGL-PSPNR, sy-vline,
  WA_LABGL-LIFNR, sy-vline,
  WA_LABGL-VBELN, sy-vline,
  WA_LABGL-POSNR, sy-vline,
  WA_LABGL-LABST, sy-vline,
  WA_LABGL-INSME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LABGL 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_LABGL 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_LABGL INTO WA_LABGL.


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

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_LABGL-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LABGL-PSPNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit LENUM, internal->external for field LENUM
CALL FUNCTION 'CONVERSION_EXIT_LENUM_OUTPUT'
  EXPORTING
    input =                      WA_LABGL-LENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LABGL-LENUM.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field EXIDV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LABGL-EXIDV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LABGL-EXIDV.
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_LABGL_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
PSPNR TYPE STRING,
LIFNR TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
LABST TYPE STRING,
INSME TYPE STRING,
SPEME TYPE STRING,
RETME TYPE STRING,
KLABS TYPE STRING,
KINSM TYPE STRING,
KSPEM TYPE STRING,
MEINS TYPE STRING,
SGT_SCAT TYPE STRING,
LGNUM TYPE STRING,
SONUM TYPE STRING,
BESTQ TYPE STRING,
GESME TYPE STRING,
LQNUM TYPE STRING,
IDANW TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
LENUM TYPE STRING,
VENUM TYPE STRING,
EXIDV TYPE STRING,
CLORT TYPE STRING,
DELET TYPE STRING,
HUEIN TYPE STRING,
IMEIN TYPE STRING,
WMEIN TYPE STRING,
DIFF TYPE STRING,
BESHU TYPE STRING,
BESLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LABGL_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_LABGL_STR-MATNR sy-vline 
WA_LABGL_STR-WERKS sy-vline 
WA_LABGL_STR-LGORT sy-vline 
WA_LABGL_STR-CHARG sy-vline 
WA_LABGL_STR-SOBKZ sy-vline 
WA_LABGL_STR-PSPNR sy-vline 
WA_LABGL_STR-LIFNR sy-vline 
WA_LABGL_STR-VBELN sy-vline 
WA_LABGL_STR-POSNR sy-vline 
WA_LABGL_STR-LABST sy-vline 
WA_LABGL_STR-INSME sy-vline 
WA_LABGL_STR-SPEME sy-vline 
WA_LABGL_STR-RETME sy-vline 
WA_LABGL_STR-KLABS sy-vline 
WA_LABGL_STR-KINSM sy-vline 
WA_LABGL_STR-KSPEM sy-vline 
WA_LABGL_STR-MEINS sy-vline 
WA_LABGL_STR-SGT_SCAT sy-vline 
WA_LABGL_STR-LGNUM sy-vline 
WA_LABGL_STR-SONUM sy-vline 
WA_LABGL_STR-BESTQ sy-vline 
WA_LABGL_STR-GESME sy-vline 
WA_LABGL_STR-LQNUM sy-vline 
WA_LABGL_STR-IDANW sy-vline 
WA_LABGL_STR-LGTYP sy-vline 
WA_LABGL_STR-LGPLA sy-vline 
WA_LABGL_STR-LENUM sy-vline 
WA_LABGL_STR-VENUM sy-vline 
WA_LABGL_STR-EXIDV sy-vline 
WA_LABGL_STR-CLORT sy-vline 
WA_LABGL_STR-DELET sy-vline 
WA_LABGL_STR-HUEIN sy-vline 
WA_LABGL_STR-IMEIN sy-vline 
WA_LABGL_STR-WMEIN sy-vline 
WA_LABGL_STR-DIFF sy-vline 
WA_LABGL_STR-BESHU sy-vline 
WA_LABGL_STR-BESLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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