ABAP Select data from SAP table IMKPF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IMKPF
*  INTO TABLE @DATA(IT_IMKPF2).
*--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_IMKPF INDEX 1 INTO DATA(WA_IMKPF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IMKPF>-BLDAT = 1.
<IMKPF>-BUDAT = 1.
<IMKPF>-XBLNR = 1.
<IMKPF>-BKTXT = 1.
<IMKPF>-FRBNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IMKPF-XABLN, sy-vline,
  WA_IMKPF-EXNUM, sy-vline,
  WA_IMKPF-USNAM, sy-vline,
  WA_IMKPF-VBUND, sy-vline,
  WA_IMKPF-BFWMS, sy-vline,
  WA_IMKPF-PR_UNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IMKPF 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_IMKPF 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_IMKPF INTO WA_IMKPF.


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

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

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

*Conversion exit ALPHA, internal->external for field SPE_LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IMKPF-SPE_LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMKPF-SPE_LOGSYS.
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_IMKPF_STR, 
BLDAT TYPE STRING,
BUDAT TYPE STRING,
XBLNR TYPE STRING,
BKTXT TYPE STRING,
FRBNR TYPE STRING,
XABLN TYPE STRING,
EXNUM TYPE STRING,
USNAM TYPE STRING,
VBUND TYPE STRING,
BFWMS TYPE STRING,
PR_UNAME TYPE STRING,
PR_PRINT TYPE STRING,
LIFEX TYPE STRING,
WEVER TYPE STRING,
WEVERX TYPE STRING,
BAR_CODE TYPE STRING,
SPE_BUDAT_UHR TYPE STRING,
SPE_BUDAT_ZONE TYPE STRING,
LE_VBELN TYPE STRING,
SPE_LOGSYS TYPE STRING,
SPE_MDNUM_EWM TYPE STRING,
GTS_CUSREF_NO TYPE STRING,
MSR_ACTIVE TYPE STRING,
EWM_SYNC_POST_REQ TYPE STRING,
XCOMPL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IMKPF_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_IMKPF_STR-BLDAT sy-vline 
WA_IMKPF_STR-BUDAT sy-vline 
WA_IMKPF_STR-XBLNR sy-vline 
WA_IMKPF_STR-BKTXT sy-vline 
WA_IMKPF_STR-FRBNR sy-vline 
WA_IMKPF_STR-XABLN sy-vline 
WA_IMKPF_STR-EXNUM sy-vline 
WA_IMKPF_STR-USNAM sy-vline 
WA_IMKPF_STR-VBUND sy-vline 
WA_IMKPF_STR-BFWMS sy-vline 
WA_IMKPF_STR-PR_UNAME sy-vline 
WA_IMKPF_STR-PR_PRINT sy-vline 
WA_IMKPF_STR-LIFEX sy-vline 
WA_IMKPF_STR-WEVER sy-vline 
WA_IMKPF_STR-WEVERX sy-vline 
WA_IMKPF_STR-BAR_CODE sy-vline 
WA_IMKPF_STR-SPE_BUDAT_UHR sy-vline 
WA_IMKPF_STR-SPE_BUDAT_ZONE sy-vline 
WA_IMKPF_STR-LE_VBELN sy-vline 
WA_IMKPF_STR-SPE_LOGSYS sy-vline 
WA_IMKPF_STR-SPE_MDNUM_EWM sy-vline 
WA_IMKPF_STR-GTS_CUSREF_NO sy-vline 
WA_IMKPF_STR-MSR_ACTIVE sy-vline 
WA_IMKPF_STR-EWM_SYNC_POST_REQ sy-vline 
WA_IMKPF_STR-XCOMPL sy-vline      INTO ld_text SEPARATED BY SPACE.

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