ABAP Select data from SAP table BAPIDFKKOPW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPIDFKKOPW
*  INTO TABLE @DATA(IT_BAPIDFKKOPW2).
*--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_BAPIDFKKOPW INDEX 1 INTO DATA(WA_BAPIDFKKOPW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPIDFKKOPW>-DOC_NO = 1.
<BAPIDFKKOPW>-REPET_GRP = 1.
<BAPIDFKKOPW>-REP_ITEM = 1.
<BAPIDFKKOPW>-NUMBER_REPETITIONS = 1.
<BAPIDFKKOPW>-BUSPARTNER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPIDFKKOPW-CONT_ACCT, sy-vline,
  WA_BAPIDFKKOPW-SUB_DOC, sy-vline,
  WA_BAPIDFKKOPW-DOC_CAT, sy-vline,
  WA_BAPIDFKKOPW-POST_DATE, sy-vline,
  WA_BAPIDFKKOPW-NET_DATE, sy-vline,
  WA_BAPIDFKKOPW-DISC_DUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPIDFKKOPW 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_BAPIDFKKOPW 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_BAPIDFKKOPW INTO WA_BAPIDFKKOPW.


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

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

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

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

*Conversion exit ALPHA, internal->external for field CLEARDOCNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPIDFKKOPW-CLEARDOCNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPIDFKKOPW-CLEARDOCNO.
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_BAPIDFKKOPW_STR, 
DOC_NO TYPE STRING,
REPET_GRP TYPE STRING,
REP_ITEM TYPE STRING,
NUMBER_REPETITIONS TYPE STRING,
BUSPARTNER TYPE STRING,
CONT_ACCT TYPE STRING,
SUB_DOC TYPE STRING,
DOC_CAT TYPE STRING,
POST_DATE TYPE STRING,
NET_DATE TYPE STRING,
DISC_DUE TYPE STRING,
PERIOD_KEY TYPE STRING,
CHG_BLOCK TYPE STRING,
DUNN_BLOCK TYPE STRING,
CLEARDATE TYPE STRING,
CLEARDOCNO TYPE STRING,
CL_POSTDTE TYPE STRING,
CLEAR_REAS TYPE STRING,
VAL_DATE TYPE STRING,
CANCELED TYPE STRING,
REP_REMOVED TYPE STRING,
REVERSECLG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPIDFKKOPW_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_BAPIDFKKOPW_STR-DOC_NO sy-vline 
WA_BAPIDFKKOPW_STR-REPET_GRP sy-vline 
WA_BAPIDFKKOPW_STR-REP_ITEM sy-vline 
WA_BAPIDFKKOPW_STR-NUMBER_REPETITIONS sy-vline 
WA_BAPIDFKKOPW_STR-BUSPARTNER sy-vline 
WA_BAPIDFKKOPW_STR-CONT_ACCT sy-vline 
WA_BAPIDFKKOPW_STR-SUB_DOC sy-vline 
WA_BAPIDFKKOPW_STR-DOC_CAT sy-vline 
WA_BAPIDFKKOPW_STR-POST_DATE sy-vline 
WA_BAPIDFKKOPW_STR-NET_DATE sy-vline 
WA_BAPIDFKKOPW_STR-DISC_DUE sy-vline 
WA_BAPIDFKKOPW_STR-PERIOD_KEY sy-vline 
WA_BAPIDFKKOPW_STR-CHG_BLOCK sy-vline 
WA_BAPIDFKKOPW_STR-DUNN_BLOCK sy-vline 
WA_BAPIDFKKOPW_STR-CLEARDATE sy-vline 
WA_BAPIDFKKOPW_STR-CLEARDOCNO sy-vline 
WA_BAPIDFKKOPW_STR-CL_POSTDTE sy-vline 
WA_BAPIDFKKOPW_STR-CLEAR_REAS sy-vline 
WA_BAPIDFKKOPW_STR-VAL_DATE sy-vline 
WA_BAPIDFKKOPW_STR-CANCELED sy-vline 
WA_BAPIDFKKOPW_STR-REP_REMOVED sy-vline 
WA_BAPIDFKKOPW_STR-REVERSECLG sy-vline      INTO ld_text SEPARATED BY SPACE.

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