ABAP Select data from SAP table OIKCF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIKCF
*  INTO TABLE @DATA(IT_OIKCF2).
*--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_OIKCF INDEX 1 INTO DATA(WA_OIKCF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIKCF>-CLIENT = 1.
<OIKCF>-LIDNO = 1.
<OIKCF>-LIDTYPE = 1.
<OIKCF>-CONTRSTR = 1.
<OIKCF>-SOLDTO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIKCF-SHIPTO, sy-vline,
  WA_OIKCF-VSTEL, sy-vline,
  WA_OIKCF-WERKS, sy-vline,
  WA_OIKCF-LGORT, sy-vline,
  WA_OIKCF-CHARG, sy-vline,
  WA_OIKCF-MATKL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIKCF 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_OIKCF 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_OIKCF INTO WA_OIKCF.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field DRIVERCODE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIKCF-DRIVERCODE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIKCF-DRIVERCODE.
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_OIKCF_STR, 
CLIENT TYPE STRING,
LIDNO TYPE STRING,
LIDTYPE TYPE STRING,
CONTRSTR TYPE STRING,
SOLDTO TYPE STRING,
SHIPTO TYPE STRING,
VSTEL TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
MATKL TYPE STRING,
MATNR TYPE STRING,
OIHANTYP TYPE STRING,
TPLST TYPE STRING,
VEHICLE TYPE STRING,
DRIVERCODE TYPE STRING,
BWTAR TYPE STRING,
SHIFT TYPE STRING,
TRIP TYPE STRING,
OIC_MOT TYPE STRING,
VSBED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIKCF_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_OIKCF_STR-CLIENT sy-vline 
WA_OIKCF_STR-LIDNO sy-vline 
WA_OIKCF_STR-LIDTYPE sy-vline 
WA_OIKCF_STR-CONTRSTR sy-vline 
WA_OIKCF_STR-SOLDTO sy-vline 
WA_OIKCF_STR-SHIPTO sy-vline 
WA_OIKCF_STR-VSTEL sy-vline 
WA_OIKCF_STR-WERKS sy-vline 
WA_OIKCF_STR-LGORT sy-vline 
WA_OIKCF_STR-CHARG sy-vline 
WA_OIKCF_STR-MATKL sy-vline 
WA_OIKCF_STR-MATNR sy-vline 
WA_OIKCF_STR-OIHANTYP sy-vline 
WA_OIKCF_STR-TPLST sy-vline 
WA_OIKCF_STR-VEHICLE sy-vline 
WA_OIKCF_STR-DRIVERCODE sy-vline 
WA_OIKCF_STR-BWTAR sy-vline 
WA_OIKCF_STR-SHIFT sy-vline 
WA_OIKCF_STR-TRIP sy-vline 
WA_OIKCF_STR-OIC_MOT sy-vline 
WA_OIKCF_STR-VSBED sy-vline      INTO ld_text SEPARATED BY SPACE.

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