ABAP Select data from SAP table IOBJVALLNKDATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IOBJVALLNKDATA
*  INTO TABLE @DATA(IT_IOBJVALLNKDATA2).
*--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_IOBJVALLNKDATA INDEX 1 INTO DATA(WA_IOBJVALLNKDATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IOBJVALLNKDATA>-MANDT = 1.
<IOBJVALLNKDATA>-OBJECTVALUATIONUUID = 1.
<IOBJVALLNKDATA>-OBJECTVALUATIONLINKUUID = 1.
<IOBJVALLNKDATA>-OBJECTVALUATIONTYPE = 1.
<IOBJVALLNKDATA>-OBJECTVALUATIONCALCULATEDAMT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IOBJVALLNKDATA-OBJECTVALUATIONCALCULATEDCRCY, sy-vline,
  WA_IOBJVALLNKDATA-OBJECTVALUATIONENTEREDAMOUNT, sy-vline,
  WA_IOBJVALLNKDATA-OBJECTVALUATIONENTEREDCURRENCY, sy-vline,
  WA_IOBJVALLNKDATA-OBJECTVALUATIONVALIDFROMDATE, sy-vline,
  WA_IOBJVALLNKDATA-OBJECTVALUATIONVALIDTODATE, sy-vline,
  WA_IOBJVALLNKDATA-OBJECTFIRSTVALUATIONDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IOBJVALLNKDATA 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_IOBJVALLNKDATA 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_IOBJVALLNKDATA INTO WA_IOBJVALLNKDATA.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_IOBJVALLNKDATA_STR, 
MANDT TYPE STRING,
OBJECTVALUATIONUUID TYPE STRING,
OBJECTVALUATIONLINKUUID TYPE STRING,
OBJECTVALUATIONTYPE TYPE STRING,
OBJECTVALUATIONCALCULATEDAMT TYPE STRING,
OBJECTVALUATIONCALCULATEDCRCY TYPE STRING,
OBJECTVALUATIONENTEREDAMOUNT TYPE STRING,
OBJECTVALUATIONENTEREDCURRENCY TYPE STRING,
OBJECTVALUATIONVALIDFROMDATE TYPE STRING,
OBJECTVALUATIONVALIDTODATE TYPE STRING,
OBJECTFIRSTVALUATIONDATE TYPE STRING,
OBJECTVALUATIONORIGIN TYPE STRING,
OBJECTVALUATIONENTEREDDATETIME TYPE STRING,
OBJECTVALUATIONLASTCHGDDTETME TYPE STRING,
MOVABLEOBJECTUUID TYPE STRING,
SHIPOBJECTUUID TYPE STRING,
RIGHTSOBJECTUUID TYPE STRING,
INSURANCEOBJECTCATEGORY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IOBJVALLNKDATA_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_IOBJVALLNKDATA_STR-MANDT sy-vline 
WA_IOBJVALLNKDATA_STR-OBJECTVALUATIONUUID sy-vline 
WA_IOBJVALLNKDATA_STR-OBJECTVALUATIONLINKUUID sy-vline 
WA_IOBJVALLNKDATA_STR-OBJECTVALUATIONTYPE sy-vline 
WA_IOBJVALLNKDATA_STR-OBJECTVALUATIONCALCULATEDAMT sy-vline 
WA_IOBJVALLNKDATA_STR-OBJECTVALUATIONCALCULATEDCRCY sy-vline 
WA_IOBJVALLNKDATA_STR-OBJECTVALUATIONENTEREDAMOUNT sy-vline 
WA_IOBJVALLNKDATA_STR-OBJECTVALUATIONENTEREDCURRENCY sy-vline 
WA_IOBJVALLNKDATA_STR-OBJECTVALUATIONVALIDFROMDATE sy-vline 
WA_IOBJVALLNKDATA_STR-OBJECTVALUATIONVALIDTODATE sy-vline 
WA_IOBJVALLNKDATA_STR-OBJECTFIRSTVALUATIONDATE sy-vline 
WA_IOBJVALLNKDATA_STR-OBJECTVALUATIONORIGIN sy-vline 
WA_IOBJVALLNKDATA_STR-OBJECTVALUATIONENTEREDDATETIME sy-vline 
WA_IOBJVALLNKDATA_STR-OBJECTVALUATIONLASTCHGDDTETME sy-vline 
WA_IOBJVALLNKDATA_STR-MOVABLEOBJECTUUID sy-vline 
WA_IOBJVALLNKDATA_STR-SHIPOBJECTUUID sy-vline 
WA_IOBJVALLNKDATA_STR-RIGHTSOBJECTUUID sy-vline 
WA_IOBJVALLNKDATA_STR-INSURANCEOBJECTCATEGORY sy-vline      INTO ld_text SEPARATED BY SPACE.

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