ABAP Select data from SAP table IODISP into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IODISP 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 IODISP. 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 IODISP 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_IODISP TYPE STANDARD TABLE OF IODISP,
      WA_IODISP TYPE IODISP,
      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: <IODISP> TYPE IODISP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IODISP
*  INTO TABLE @DATA(IT_IODISP2).
*--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_IODISP INDEX 1 INTO DATA(WA_IODISP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IODISP>-MANDT = 1.
<IODISP>-AUFPL = 1.
<IODISP>-BDMNG = 1.
<IODISP>-ARBID = 1.
<IODISP>-ARBPL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IODISP-APWRK, sy-vline,
  WA_IODISP-OLD_ARBID, sy-vline,
  WA_IODISP-OLD_ARBPL, sy-vline,
  WA_IODISP-OLD_APWRK, sy-vline,
  WA_IODISP-KALID, sy-vline,
  WA_IODISP-AUFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IODISP 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_IODISP 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_IODISP INTO WA_IODISP.


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

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

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

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

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

*Conversion exit ABPSP, internal->external for field PSPEL
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_IODISP-PSPEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IODISP-PSPEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IODISP-GMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IODISP-GMEIN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field KDAUF_AUFK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IODISP-KDAUF_AUFK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IODISP-KDAUF_AUFK.
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_IODISP_STR, 
MANDT TYPE STRING,
AUFPL TYPE STRING,
BDMNG TYPE STRING,
ARBID TYPE STRING,
ARBPL TYPE STRING,
APWRK TYPE STRING,
OLD_ARBID TYPE STRING,
OLD_ARBPL TYPE STRING,
OLD_APWRK TYPE STRING,
KALID TYPE STRING,
AUFNR TYPE STRING,
PLNUM TYPE STRING,
PRODNET TYPE STRING,
LEAD_AUFNR TYPE STRING,
AUART TYPE STRING,
AUTYP TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
RSNUM TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
PSPEL TYPE STRING,
SOBKZ TYPE STRING,
GAMNG TYPE STRING,
GMEIN TYPE STRING,
GLTRP TYPE STRING,
OBJNR TYPE STRING,
SFCPF TYPE STRING,
DISPO TYPE STRING,
FEVOR TYPE STRING,
RETCODE TYPE STRING,
MSGTY TYPE STRING,
XFEHL TYPE STRING,
VFMNG TYPE STRING,
GSBTR TYPE STRING,
BSFAK TYPE STRING,
PROZENT TYPE STRING,
BSDIF TYPE STRING,
EINHEIT TYPE STRING,
TBSTR TYPE STRING,
TBSMG TYPE STRING,
TABIX TYPE STRING,
KZAVC TYPE STRING,
MDPBV TYPE STRING,
STUFE TYPE STRING,
ARSNR TYPE STRING,
ARSPS TYPE STRING,
GASMG TYPE STRING,
PLWRK TYPE STRING,
STTXT TYPE STRING,
ASTEX TYPE STRING,
ASTTX TYPE STRING,
KUNNR TYPE STRING,
KDAUF_AUFK TYPE STRING,
KDPOS_AUFK TYPE STRING,
CY_SEQNR TYPE STRING,
APRIO TYPE STRING,
FTRMS TYPE STRING,
FTRMI TYPE STRING,
FTRMP TYPE STRING,
GSTRP TYPE STRING,
GLTRS TYPE STRING,
GSTRS TYPE STRING,
GSTRI TYPE STRING,
GLTRI TYPE STRING,
ARBTX TYPE STRING,
RELERR TYPE STRING,
FLG_DSP TYPE STRING,
FLG_REL TYPE STRING,
FLG_UPD TYPE STRING,
KZ_MARK TYPE STRING,
INDEX_NODE TYPE STRING,
INDEX_INT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IODISP_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_IODISP_STR-MANDT sy-vline 
WA_IODISP_STR-AUFPL sy-vline 
WA_IODISP_STR-BDMNG sy-vline 
WA_IODISP_STR-ARBID sy-vline 
WA_IODISP_STR-ARBPL sy-vline 
WA_IODISP_STR-APWRK sy-vline 
WA_IODISP_STR-OLD_ARBID sy-vline 
WA_IODISP_STR-OLD_ARBPL sy-vline 
WA_IODISP_STR-OLD_APWRK sy-vline 
WA_IODISP_STR-KALID sy-vline 
WA_IODISP_STR-AUFNR sy-vline 
WA_IODISP_STR-PLNUM sy-vline 
WA_IODISP_STR-PRODNET sy-vline 
WA_IODISP_STR-LEAD_AUFNR sy-vline 
WA_IODISP_STR-AUART sy-vline 
WA_IODISP_STR-AUTYP sy-vline 
WA_IODISP_STR-MATNR sy-vline 
WA_IODISP_STR-WERKS sy-vline 
WA_IODISP_STR-RSNUM sy-vline 
WA_IODISP_STR-KDAUF sy-vline 
WA_IODISP_STR-KDPOS sy-vline 
WA_IODISP_STR-PSPEL sy-vline 
WA_IODISP_STR-SOBKZ sy-vline 
WA_IODISP_STR-GAMNG sy-vline 
WA_IODISP_STR-GMEIN sy-vline 
WA_IODISP_STR-GLTRP sy-vline 
WA_IODISP_STR-OBJNR sy-vline 
WA_IODISP_STR-SFCPF sy-vline 
WA_IODISP_STR-DISPO sy-vline 
WA_IODISP_STR-FEVOR sy-vline 
WA_IODISP_STR-RETCODE sy-vline 
WA_IODISP_STR-MSGTY sy-vline 
WA_IODISP_STR-XFEHL sy-vline 
WA_IODISP_STR-VFMNG sy-vline 
WA_IODISP_STR-GSBTR sy-vline 
WA_IODISP_STR-BSFAK sy-vline 
WA_IODISP_STR-PROZENT sy-vline 
WA_IODISP_STR-BSDIF sy-vline 
WA_IODISP_STR-EINHEIT sy-vline 
WA_IODISP_STR-TBSTR sy-vline 
WA_IODISP_STR-TBSMG sy-vline 
WA_IODISP_STR-TABIX sy-vline 
WA_IODISP_STR-KZAVC sy-vline 
WA_IODISP_STR-MDPBV sy-vline 
WA_IODISP_STR-STUFE sy-vline 
WA_IODISP_STR-ARSNR sy-vline 
WA_IODISP_STR-ARSPS sy-vline 
WA_IODISP_STR-GASMG sy-vline 
WA_IODISP_STR-PLWRK sy-vline 
WA_IODISP_STR-STTXT sy-vline 
WA_IODISP_STR-ASTEX sy-vline 
WA_IODISP_STR-ASTTX sy-vline 
WA_IODISP_STR-KUNNR sy-vline 
WA_IODISP_STR-KDAUF_AUFK sy-vline 
WA_IODISP_STR-KDPOS_AUFK sy-vline 
WA_IODISP_STR-CY_SEQNR sy-vline 
WA_IODISP_STR-APRIO sy-vline 
WA_IODISP_STR-FTRMS sy-vline 
WA_IODISP_STR-FTRMI sy-vline 
WA_IODISP_STR-FTRMP sy-vline 
WA_IODISP_STR-GSTRP sy-vline 
WA_IODISP_STR-GLTRS sy-vline 
WA_IODISP_STR-GSTRS sy-vline 
WA_IODISP_STR-GSTRI sy-vline 
WA_IODISP_STR-GLTRI sy-vline 
WA_IODISP_STR-ARBTX sy-vline 
WA_IODISP_STR-RELERR sy-vline 
WA_IODISP_STR-FLG_DSP sy-vline 
WA_IODISP_STR-FLG_REL sy-vline 
WA_IODISP_STR-FLG_UPD sy-vline 
WA_IODISP_STR-KZ_MARK sy-vline 
WA_IODISP_STR-INDEX_NODE sy-vline 
WA_IODISP_STR-INDEX_INT sy-vline      INTO ld_text SEPARATED BY SPACE.

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