ABAP Select data from SAP table COKP2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP COKP2 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 COKP2. 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 COKP2 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_COKP2 TYPE STANDARD TABLE OF COKP2,
      WA_COKP2 TYPE COKP2,
      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: <COKP2> TYPE COKP2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_COKP2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM COKP2
  INTO TABLE IT_COKP2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COKP2
*  INTO TABLE @DATA(IT_COKP22).
*--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_COKP2 INDEX 1 INTO DATA(WA_COKP22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_COKP2 ASSIGNING <COKP2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COKP2>-MANDT = 1.
<COKP2>-LEDNR = 1.
<COKP2>-OBJNR = 1.
<COKP2>-GJAHR = 1.
<COKP2>-WRTTP = 1.

ENDLOOP.

LOOP AT IT_COKP2 INTO WA_COKP2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COKP2-VERSN, sy-vline,
  WA_COKP2-KSTAR, sy-vline,
  WA_COKP2-HRKFT, sy-vline,
  WA_COKP2-VRGNG, sy-vline,
  WA_COKP2-VBUND, sy-vline,
  WA_COKP2-PARGB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COKP2 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_COKP2 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_COKP2 INTO WA_COKP2.


*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 LEDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COKP2-LEDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COKP2-LEDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_COKP2-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COKP2-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WRTTP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COKP2-WRTTP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COKP2-WRTTP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COKP2-VERSN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COKP2-VERSN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KSTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COKP2-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COKP2-KSTAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBUND
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COKP2-VBUND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COKP2-VBUND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit BEKNZ, internal->external for field BEKNZ
CALL FUNCTION 'CONVERSION_EXIT_BEKNZ_OUTPUT'
  EXPORTING
    input =                      WA_COKP2-BEKNZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COKP2-BEKNZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field RZKST
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_COKP2-RZKST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COKP2-RZKST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RZKOA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COKP2-RZKOA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COKP2-RZKOA.
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_COKP2_STR, 
MANDT TYPE STRING,
LEDNR TYPE STRING,
OBJNR TYPE STRING,
GJAHR TYPE STRING,
WRTTP TYPE STRING,
VERSN TYPE STRING,
KSTAR TYPE STRING,
HRKFT TYPE STRING,
VRGNG TYPE STRING,
VBUND TYPE STRING,
PARGB TYPE STRING,
BEKNZ TYPE STRING,
TWAER TYPE STRING,
RZTYP TYPE STRING,
RZVAR TYPE STRING,
RZMNG TYPE STRING,
RSTLA TYPE STRING,
LKSTAR TYPE STRING,
RZKST TYPE STRING,
RSTKA TYPE STRING,
RZKOA TYPE STRING,
RZFKT TYPE STRING,
RZPRZ TYPE STRING,
WSWKF TYPE STRING,
WSWKV TYPE STRING,
WSWKG TYPE STRING,
WSMEF TYPE STRING,
WSMEV TYPE STRING,
WSMEG TYPE STRING,
FMWKF TYPE STRING,
FMWKV TYPE STRING,
FMWKG TYPE STRING,
FMMEF TYPE STRING,
FMMEV TYPE STRING,
FMMEG TYPE STRING,
KKART TYPE STRING,
KALNR TYPE STRING,
TXFLG TYPE STRING,
FCWKF TYPE STRING,
FCWKV TYPE STRING,
FCWKG TYPE STRING,
FCWOF TYPE STRING,
FCWOV TYPE STRING,
FCWOG TYPE STRING,
FCWTF TYPE STRING,
FCWTV TYPE STRING,
FCWTG TYPE STRING,
FCMEF TYPE STRING,
FCMEV TYPE STRING,
FCMEG TYPE STRING,
FCRKF TYPE STRING,
FCRKV TYPE STRING,
FCRKG TYPE STRING,
FCROF TYPE STRING,
FCROV TYPE STRING,
FCROG TYPE STRING,
FCREF TYPE STRING,
FCREV TYPE STRING,
FCREG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COKP2_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_COKP2_STR-MANDT sy-vline 
WA_COKP2_STR-LEDNR sy-vline 
WA_COKP2_STR-OBJNR sy-vline 
WA_COKP2_STR-GJAHR sy-vline 
WA_COKP2_STR-WRTTP sy-vline 
WA_COKP2_STR-VERSN sy-vline 
WA_COKP2_STR-KSTAR sy-vline 
WA_COKP2_STR-HRKFT sy-vline 
WA_COKP2_STR-VRGNG sy-vline 
WA_COKP2_STR-VBUND sy-vline 
WA_COKP2_STR-PARGB sy-vline 
WA_COKP2_STR-BEKNZ sy-vline 
WA_COKP2_STR-TWAER sy-vline 
WA_COKP2_STR-RZTYP sy-vline 
WA_COKP2_STR-RZVAR sy-vline 
WA_COKP2_STR-RZMNG sy-vline 
WA_COKP2_STR-RSTLA sy-vline 
WA_COKP2_STR-LKSTAR sy-vline 
WA_COKP2_STR-RZKST sy-vline 
WA_COKP2_STR-RSTKA sy-vline 
WA_COKP2_STR-RZKOA sy-vline 
WA_COKP2_STR-RZFKT sy-vline 
WA_COKP2_STR-RZPRZ sy-vline 
WA_COKP2_STR-WSWKF sy-vline 
WA_COKP2_STR-WSWKV sy-vline 
WA_COKP2_STR-WSWKG sy-vline 
WA_COKP2_STR-WSMEF sy-vline 
WA_COKP2_STR-WSMEV sy-vline 
WA_COKP2_STR-WSMEG sy-vline 
WA_COKP2_STR-FMWKF sy-vline 
WA_COKP2_STR-FMWKV sy-vline 
WA_COKP2_STR-FMWKG sy-vline 
WA_COKP2_STR-FMMEF sy-vline 
WA_COKP2_STR-FMMEV sy-vline 
WA_COKP2_STR-FMMEG sy-vline 
WA_COKP2_STR-KKART sy-vline 
WA_COKP2_STR-KALNR sy-vline 
WA_COKP2_STR-TXFLG sy-vline 
WA_COKP2_STR-FCWKF sy-vline 
WA_COKP2_STR-FCWKV sy-vline 
WA_COKP2_STR-FCWKG sy-vline 
WA_COKP2_STR-FCWOF sy-vline 
WA_COKP2_STR-FCWOV sy-vline 
WA_COKP2_STR-FCWOG sy-vline 
WA_COKP2_STR-FCWTF sy-vline 
WA_COKP2_STR-FCWTV sy-vline 
WA_COKP2_STR-FCWTG sy-vline 
WA_COKP2_STR-FCMEF sy-vline 
WA_COKP2_STR-FCMEV sy-vline 
WA_COKP2_STR-FCMEG sy-vline 
WA_COKP2_STR-FCRKF sy-vline 
WA_COKP2_STR-FCRKV sy-vline 
WA_COKP2_STR-FCRKG sy-vline 
WA_COKP2_STR-FCROF sy-vline 
WA_COKP2_STR-FCROV sy-vline 
WA_COKP2_STR-FCROG sy-vline 
WA_COKP2_STR-FCREF sy-vline 
WA_COKP2_STR-FCREV sy-vline 
WA_COKP2_STR-FCREG sy-vline      INTO ld_text SEPARATED BY SPACE.

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