ABAP Select data from SAP table OIASDD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIASDD
*  INTO TABLE @DATA(IT_OIASDD2).
*--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_OIASDD INDEX 1 INTO DATA(WA_OIASDD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIASDD>-MANDT = 1.
<OIASDD>-EXGNUM = 1.
<OIASDD>-EXGTYP = 1.
<OIASDD>-EXGPTR = 1.
<OIASDD>-PTRREF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIASDD-MATPST, sy-vline,
  WA_OIASDD-FEEPST, sy-vline,
  WA_OIASDD-NETTNG, sy-vline,
  WA_OIASDD-ENTLU, sy-vline,
  WA_OIASDD-OWNCHK, sy-vline,
  WA_OIASDD-NUMKR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIASDD 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_OIASDD 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_OIASDD INTO WA_OIASDD.


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

*Conversion exit ALPHA, internal->external for field EXGPTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIASDD-EXGPTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIASDD-EXGPTR.
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_OIASDD_STR, 
MANDT TYPE STRING,
EXGNUM TYPE STRING,
EXGTYP TYPE STRING,
EXGPTR TYPE STRING,
PTRREF TYPE STRING,
MATPST TYPE STRING,
FEEPST TYPE STRING,
NETTNG TYPE STRING,
ENTLU TYPE STRING,
OWNCHK TYPE STRING,
NUMKR TYPE STRING,
FEECHK TYPE STRING,
OIA_IPMVAT TYPE STRING,
SPLIT TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
AENAM TYPE STRING,
NETCYC TYPE STRING,
OISBREL TYPE STRING,
OICHSBP TYPE STRING,
OIA_BASELO TYPE STRING,
EXGSTAT TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
REVDA TYPE STRING,
EVGTYPE TYPE STRING,
NOTPER TYPE STRING,
EXGSELECT TYPE STRING,
OIA_PB_FEE TYPE STRING,
_DATAAGING TYPE STRING,
PDUMMY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIASDD_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_OIASDD_STR-MANDT sy-vline 
WA_OIASDD_STR-EXGNUM sy-vline 
WA_OIASDD_STR-EXGTYP sy-vline 
WA_OIASDD_STR-EXGPTR sy-vline 
WA_OIASDD_STR-PTRREF sy-vline 
WA_OIASDD_STR-MATPST sy-vline 
WA_OIASDD_STR-FEEPST sy-vline 
WA_OIASDD_STR-NETTNG sy-vline 
WA_OIASDD_STR-ENTLU sy-vline 
WA_OIASDD_STR-OWNCHK sy-vline 
WA_OIASDD_STR-NUMKR sy-vline 
WA_OIASDD_STR-FEECHK sy-vline 
WA_OIASDD_STR-OIA_IPMVAT sy-vline 
WA_OIASDD_STR-SPLIT sy-vline 
WA_OIASDD_STR-ERDAT sy-vline 
WA_OIASDD_STR-ERTIM sy-vline 
WA_OIASDD_STR-ERNAM sy-vline 
WA_OIASDD_STR-AEDAT sy-vline 
WA_OIASDD_STR-AETIM sy-vline 
WA_OIASDD_STR-AENAM sy-vline 
WA_OIASDD_STR-NETCYC sy-vline 
WA_OIASDD_STR-OISBREL sy-vline 
WA_OIASDD_STR-OICHSBP sy-vline 
WA_OIASDD_STR-OIA_BASELO sy-vline 
WA_OIASDD_STR-EXGSTAT sy-vline 
WA_OIASDD_STR-BEGDA sy-vline 
WA_OIASDD_STR-ENDDA sy-vline 
WA_OIASDD_STR-REVDA sy-vline 
WA_OIASDD_STR-EVGTYPE sy-vline 
WA_OIASDD_STR-NOTPER sy-vline 
WA_OIASDD_STR-EXGSELECT sy-vline 
WA_OIASDD_STR-OIA_PB_FEE sy-vline 
WA_OIASDD_STR-_DATAAGING sy-vline 
WA_OIASDD_STR-PDUMMY sy-vline      INTO ld_text SEPARATED BY SPACE.

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