ABAP Select data from SAP table OIJ03_LOVGLREF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP OIJ03_LOVGLREF 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 OIJ03_LOVGLREF. 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 OIJ03_LOVGLREF 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_OIJ03_LOVGLREF TYPE STANDARD TABLE OF OIJ03_LOVGLREF,
      WA_OIJ03_LOVGLREF TYPE OIJ03_LOVGLREF,
      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: <OIJ03_LOVGLREF> TYPE OIJ03_LOVGLREF.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_OIJ03_LOVGLREF.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM OIJ03_LOVGLREF
  INTO TABLE IT_OIJ03_LOVGLREF.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIJ03_LOVGLREF
*  INTO TABLE @DATA(IT_OIJ03_LOVGLREF2).
*--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_OIJ03_LOVGLREF INDEX 1 INTO DATA(WA_OIJ03_LOVGLREF2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_OIJ03_LOVGLREF ASSIGNING <OIJ03_LOVGLREF>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIJ03_LOVGLREF>-MANDT = 1.
<OIJ03_LOVGLREF>-TSYST = 1.
<OIJ03_LOVGLREF>-LOVID = 1.
<OIJ03_LOVGLREF>-TKNUM = 1.
<OIJ03_LOVGLREF>-TPNUM = 1.

ENDLOOP.

LOOP AT IT_OIJ03_LOVGLREF INTO WA_OIJ03_LOVGLREF.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIJ03_LOVGLREF-NOMNUM, sy-vline,
  WA_OIJ03_LOVGLREF-MATERIAL, sy-vline,
  WA_OIJ03_LOVGLREF-MBLNR, sy-vline,
  WA_OIJ03_LOVGLREF-ZEILE, sy-vline,
  WA_OIJ03_LOVGLREF-MJAHR, sy-vline,
  WA_OIJ03_LOVGLREF-LOV_ITEM_FROM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIJ03_LOVGLREF 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_OIJ03_LOVGLREF 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_OIJ03_LOVGLREF INTO WA_OIJ03_LOVGLREF.


*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 TKNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIJ03_LOVGLREF-TKNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIJ03_LOVGLREF-TKNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NOMNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIJ03_LOVGLREF-NOMNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIJ03_LOVGLREF-NOMNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_OIJ03_LOVGLREF-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIJ03_LOVGLREF-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIJ03_LOVGLREF-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIJ03_LOVGLREF-MBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_OIJ03_LOVGLREF-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIJ03_LOVGLREF-MJAHR.
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_OIJ03_LOVGLREF_STR, 
MANDT TYPE STRING,
TSYST TYPE STRING,
LOVID TYPE STRING,
TKNUM TYPE STRING,
TPNUM TYPE STRING,
NOMNUM TYPE STRING,
MATERIAL TYPE STRING,
MBLNR TYPE STRING,
ZEILE TYPE STRING,
MJAHR TYPE STRING,
LOV_ITEM_FROM TYPE STRING,
LOV_ITEM_TO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIJ03_LOVGLREF_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_OIJ03_LOVGLREF_STR-MANDT sy-vline 
WA_OIJ03_LOVGLREF_STR-TSYST sy-vline 
WA_OIJ03_LOVGLREF_STR-LOVID sy-vline 
WA_OIJ03_LOVGLREF_STR-TKNUM sy-vline 
WA_OIJ03_LOVGLREF_STR-TPNUM sy-vline 
WA_OIJ03_LOVGLREF_STR-NOMNUM sy-vline 
WA_OIJ03_LOVGLREF_STR-MATERIAL sy-vline 
WA_OIJ03_LOVGLREF_STR-MBLNR sy-vline 
WA_OIJ03_LOVGLREF_STR-ZEILE sy-vline 
WA_OIJ03_LOVGLREF_STR-MJAHR sy-vline 
WA_OIJ03_LOVGLREF_STR-LOV_ITEM_FROM sy-vline 
WA_OIJ03_LOVGLREF_STR-LOV_ITEM_TO sy-vline      INTO ld_text SEPARATED BY SPACE.

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