ABAP Select data from SAP table CKPE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CKPE
*  INTO TABLE @DATA(IT_CKPE2).
*--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_CKPE INDEX 1 INTO DATA(WA_CKPE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CKPE>-MANDT = 1.
<CKPE>-KSTRG = 1.
<CKPE>-DATBI = 1.
<CKPE>-POSNR = 1.
<CKPE>-WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CKPE-MATNR, sy-vline,
  WA_CKPE-VERSN, sy-vline,
  WA_CKPE-PLNAL, sy-vline,
  WA_CKPE-ARBPL, sy-vline,
  WA_CKPE-AUFNR, sy-vline,
  WA_CKPE-SAUFN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CKPE 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_CKPE 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_CKPE INTO WA_CKPE.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field PLNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CKPE-PLNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKPE-PLNNR.
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_CKPE_STR, 
MANDT TYPE STRING,
KSTRG TYPE STRING,
DATBI TYPE STRING,
POSNR TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
VERSN TYPE STRING,
PLNAL TYPE STRING,
ARBPL TYPE STRING,
AUFNR TYPE STRING,
SAUFN TYPE STRING,
PSPNR TYPE STRING,
PLNNR TYPE STRING,
PROCNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CKPE_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_CKPE_STR-MANDT sy-vline 
WA_CKPE_STR-KSTRG sy-vline 
WA_CKPE_STR-DATBI sy-vline 
WA_CKPE_STR-POSNR sy-vline 
WA_CKPE_STR-WERKS sy-vline 
WA_CKPE_STR-MATNR sy-vline 
WA_CKPE_STR-VERSN sy-vline 
WA_CKPE_STR-PLNAL sy-vline 
WA_CKPE_STR-ARBPL sy-vline 
WA_CKPE_STR-AUFNR sy-vline 
WA_CKPE_STR-SAUFN sy-vline 
WA_CKPE_STR-PSPNR sy-vline 
WA_CKPE_STR-PLNNR sy-vline 
WA_CKPE_STR-PROCNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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