ABAP Select data from SAP table OILKOMK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OILKOMK
*  INTO TABLE @DATA(IT_OILKOMK2).
*--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_OILKOMK INDEX 1 INTO DATA(WA_OILKOMK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OILKOMK>-OIVGBEL = 1.
<OILKOMK>-OIEBELN = 1.
<OILKOMK>-OIAFERP = 1.
<OILKOMK>-OIAFEECHG = 1.
<OILKOMK>-OIEKBSART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OILKOMK-OIEKBSTYP, sy-vline,
  WA_OILKOMK-OICHEADOFF, sy-vline,
  WA_OILKOMK-OICDUMMY, sy-vline,
  WA_OILKOMK-OIKZBEW, sy-vline,
  WA_OILKOMK-KVGR1, sy-vline,
  WA_OILKOMK-OIVGTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OILKOMK 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_OILKOMK 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_OILKOMK INTO WA_OILKOMK.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field OIAEXGNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OILKOMK-OIAEXGNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OILKOMK-OIAEXGNUM.
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_OILKOMK_STR, 
OIVGBEL TYPE STRING,
OIEBELN TYPE STRING,
OIAFERP TYPE STRING,
OIAFEECHG TYPE STRING,
OIEKBSART TYPE STRING,
OIEKBSTYP TYPE STRING,
OICHEADOFF TYPE STRING,
OICDUMMY TYPE STRING,
OIKZBEW TYPE STRING,
KVGR1 TYPE STRING,
OIVGTYP TYPE STRING,
OITITLE TYPE STRING,
OIDIFFIN TYPE STRING,
OIC_BEDAT TYPE STRING,
OIC_BLDAT TYPE STRING,
OIGSHTYPE TYPE STRING,
OICCINS TYPE STRING,
OIRICOMMCAL TYPE STRING,
OIRIPBLNR TYPE STRING,
OIAEXGNUM TYPE STRING,
VBKLA TYPE STRING,
LGORT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OILKOMK_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_OILKOMK_STR-OIVGBEL sy-vline 
WA_OILKOMK_STR-OIEBELN sy-vline 
WA_OILKOMK_STR-OIAFERP sy-vline 
WA_OILKOMK_STR-OIAFEECHG sy-vline 
WA_OILKOMK_STR-OIEKBSART sy-vline 
WA_OILKOMK_STR-OIEKBSTYP sy-vline 
WA_OILKOMK_STR-OICHEADOFF sy-vline 
WA_OILKOMK_STR-OICDUMMY sy-vline 
WA_OILKOMK_STR-OIKZBEW sy-vline 
WA_OILKOMK_STR-KVGR1 sy-vline 
WA_OILKOMK_STR-OIVGTYP sy-vline 
WA_OILKOMK_STR-OITITLE sy-vline 
WA_OILKOMK_STR-OIDIFFIN sy-vline 
WA_OILKOMK_STR-OIC_BEDAT sy-vline 
WA_OILKOMK_STR-OIC_BLDAT sy-vline 
WA_OILKOMK_STR-OIGSHTYPE sy-vline 
WA_OILKOMK_STR-OICCINS sy-vline 
WA_OILKOMK_STR-OIRICOMMCAL sy-vline 
WA_OILKOMK_STR-OIRIPBLNR sy-vline 
WA_OILKOMK_STR-OIAEXGNUM sy-vline 
WA_OILKOMK_STR-VBKLA sy-vline 
WA_OILKOMK_STR-LGORT sy-vline      INTO ld_text SEPARATED BY SPACE.

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