ABAP Select data from SAP table OIAF7 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP OIAF7 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 OIAF7. 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 OIAF7 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_OIAF7 TYPE STANDARD TABLE OF OIAF7,
      WA_OIAF7 TYPE OIAF7,
      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: <OIAF7> TYPE OIAF7.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_OIAF7.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM OIAF7
  INTO TABLE IT_OIAF7.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIAF7
*  INTO TABLE @DATA(IT_OIAF72).
*--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_OIAF7 INDEX 1 INTO DATA(WA_OIAF72).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_OIAF7 ASSIGNING <OIAF7>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIAF7>-MANDT = 1.
<OIAF7>-KNUMV = 1.
<OIAF7>-KPOSN = 1.
<OIAF7>-STUNR = 1.
<OIAF7>-ZAEHK = 1.

ENDLOOP.

LOOP AT IT_OIAF7 INTO WA_OIAF7.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIAF7-FORAVB, sy-vline,
  WA_OIAF7-FORDESC, sy-vline,
  WA_OIAF7-FORMVAL, sy-vline,
  WA_OIAF7-FORMCURR, sy-vline,
  WA_OIAF7-FORSTATUS, sy-vline,
  WA_OIAF7-RATECURR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIAF7 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_OIAF7 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_OIAF7 INTO WA_OIAF7.


*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 CUNIT, internal->external for field FORMUOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIAF7-FORMUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIAF7-FORMUOM.
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_OIAF7_STR, 
MANDT TYPE STRING,
KNUMV TYPE STRING,
KPOSN TYPE STRING,
STUNR TYPE STRING,
ZAEHK TYPE STRING,
FORAVB TYPE STRING,
FORDESC TYPE STRING,
FORMVAL TYPE STRING,
FORMCURR TYPE STRING,
FORSTATUS TYPE STRING,
RATECURR TYPE STRING,
FORMUOM TYPE STRING,
FORMPER TYPE STRING,
UOMCNVRL TYPE STRING,
FORMUMZA TYPE STRING,
FORMUMNE TYPE STRING,
RATEBASED TYPE STRING,
_DATAAGING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIAF7_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_OIAF7_STR-MANDT sy-vline 
WA_OIAF7_STR-KNUMV sy-vline 
WA_OIAF7_STR-KPOSN sy-vline 
WA_OIAF7_STR-STUNR sy-vline 
WA_OIAF7_STR-ZAEHK sy-vline 
WA_OIAF7_STR-FORAVB sy-vline 
WA_OIAF7_STR-FORDESC sy-vline 
WA_OIAF7_STR-FORMVAL sy-vline 
WA_OIAF7_STR-FORMCURR sy-vline 
WA_OIAF7_STR-FORSTATUS sy-vline 
WA_OIAF7_STR-RATECURR sy-vline 
WA_OIAF7_STR-FORMUOM sy-vline 
WA_OIAF7_STR-FORMPER sy-vline 
WA_OIAF7_STR-UOMCNVRL sy-vline 
WA_OIAF7_STR-FORMUMZA sy-vline 
WA_OIAF7_STR-FORMUMNE sy-vline 
WA_OIAF7_STR-RATEBASED sy-vline 
WA_OIAF7_STR-_DATAAGING sy-vline      INTO ld_text SEPARATED BY SPACE.

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