ABAP Select data from SAP table IREINTOBJLVL0VH into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IREINTOBJLVL0VH 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 IREINTOBJLVL0VH. 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 IREINTOBJLVL0VH 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_IREINTOBJLVL0VH TYPE STANDARD TABLE OF IREINTOBJLVL0VH,
      WA_IREINTOBJLVL0VH TYPE IREINTOBJLVL0VH,
      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: <IREINTOBJLVL0VH> TYPE IREINTOBJLVL0VH.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_IREINTOBJLVL0VH.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM IREINTOBJLVL0VH
  INTO TABLE IT_IREINTOBJLVL0VH.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IREINTOBJLVL0VH
*  INTO TABLE @DATA(IT_IREINTOBJLVL0VH2).
*--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_IREINTOBJLVL0VH INDEX 1 INTO DATA(WA_IREINTOBJLVL0VH2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_IREINTOBJLVL0VH ASSIGNING <IREINTOBJLVL0VH>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IREINTOBJLVL0VH>-MANDT = 1.
<IREINTOBJLVL0VH>-INTERNALREALESTATENUMBER = 1.
<IREINTOBJLVL0VH>-REALESTATEEXTERNALIDLVL1 = 1.
<IREINTOBJLVL0VH>-REINTEGRATIONOBJECTTYPE = 1.
<IREINTOBJLVL0VH>-REINTEGRATIONOBJECTNUMBER = 1.

ENDLOOP.

LOOP AT IT_IREINTOBJLVL0VH INTO WA_IREINTOBJLVL0VH.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IREINTOBJLVL0VH-REINTEGRATIONOBJECTNAME, sy-vline,
  WA_IREINTOBJLVL0VH-REINTEGOBJECTLONGNAME, sy-vline,
  WA_IREINTOBJLVL0VH-REPARENTINTEGOBJECTTYPE, sy-vline,
  WA_IREINTOBJLVL0VH-REPARENTINTEGOBJECTEXTERNALID, sy-vline,
  WA_IREINTOBJLVL0VH-RESPONSIBLE, sy-vline,
  WA_IREINTOBJLVL0VH-REAUTHORIZATIONGROUP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IREINTOBJLVL0VH 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_IREINTOBJLVL0VH 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_IREINTOBJLVL0VH INTO WA_IREINTOBJLVL0VH.


*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 REINTEGRATIONOBJECTNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IREINTOBJLVL0VH-REINTEGRATIONOBJECTNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IREINTOBJLVL0VH-REINTEGRATIONOBJECTNUMBER.
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_IREINTOBJLVL0VH_STR, 
MANDT TYPE STRING,
INTERNALREALESTATENUMBER TYPE STRING,
REALESTATEEXTERNALIDLVL1 TYPE STRING,
REINTEGRATIONOBJECTTYPE TYPE STRING,
REINTEGRATIONOBJECTNUMBER TYPE STRING,
REINTEGRATIONOBJECTNAME TYPE STRING,
REINTEGOBJECTLONGNAME TYPE STRING,
REPARENTINTEGOBJECTTYPE TYPE STRING,
REPARENTINTEGOBJECTEXTERNALID TYPE STRING,
RESPONSIBLE TYPE STRING,
REAUTHORIZATIONGROUP TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IREINTOBJLVL0VH_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_IREINTOBJLVL0VH_STR-MANDT sy-vline 
WA_IREINTOBJLVL0VH_STR-INTERNALREALESTATENUMBER sy-vline 
WA_IREINTOBJLVL0VH_STR-REALESTATEEXTERNALIDLVL1 sy-vline 
WA_IREINTOBJLVL0VH_STR-REINTEGRATIONOBJECTTYPE sy-vline 
WA_IREINTOBJLVL0VH_STR-REINTEGRATIONOBJECTNUMBER sy-vline 
WA_IREINTOBJLVL0VH_STR-REINTEGRATIONOBJECTNAME sy-vline 
WA_IREINTOBJLVL0VH_STR-REINTEGOBJECTLONGNAME sy-vline 
WA_IREINTOBJLVL0VH_STR-REPARENTINTEGOBJECTTYPE sy-vline 
WA_IREINTOBJLVL0VH_STR-REPARENTINTEGOBJECTEXTERNALID sy-vline 
WA_IREINTOBJLVL0VH_STR-RESPONSIBLE sy-vline 
WA_IREINTOBJLVL0VH_STR-REAUTHORIZATIONGROUP sy-vline 
WA_IREINTOBJLVL0VH_STR-VALIDITYSTARTDATE sy-vline 
WA_IREINTOBJLVL0VH_STR-VALIDITYENDDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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