ABAP Select data from SAP table BPDK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BPDK
*  INTO TABLE @DATA(IT_BPDK2).
*--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_BPDK INDEX 1 INTO DATA(WA_BPDK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BPDK>-MANDT = 1.
<BPDK>-BELNR = 1.
<BPDK>-CPUDT = 1.
<BPDK>-BUDAT = 1.
<BPDK>-PERIO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BPDK-BLDAT, sy-vline,
  WA_BPDK-VADAT, sy-vline,
  WA_BPDK-VERANT, sy-vline,
  WA_BPDK-USNAM, sy-vline,
  WA_BPDK-VALKEY, sy-vline,
  WA_BPDK-BSTAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BPDK 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_BPDK 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_BPDK INTO WA_BPDK.


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

*Conversion exit ALPHA, internal->external for field AWSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BPDK-AWSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BPDK-AWSYS.
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_BPDK_STR, 
MANDT TYPE STRING,
BELNR TYPE STRING,
CPUDT TYPE STRING,
BUDAT TYPE STRING,
PERIO TYPE STRING,
BLDAT TYPE STRING,
VADAT TYPE STRING,
VERANT TYPE STRING,
USNAM TYPE STRING,
VALKEY TYPE STRING,
BSTAT TYPE STRING,
FCODE TYPE STRING,
REASON TYPE STRING,
RSTAT TYPE STRING,
REV_DOCNR TYPE STRING,
RPUBLAW TYPE STRING,
RLEGIS TYPE STRING,
RCOHORT TYPE STRING,
DOCTYPE TYPE STRING,
AWORG TYPE STRING,
AWREF TYPE STRING,
AWSYS TYPE STRING,
AWTYP TYPE STRING,
/SAPF15/STATUS TYPE STRING,
SRC_BELNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BPDK_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_BPDK_STR-MANDT sy-vline 
WA_BPDK_STR-BELNR sy-vline 
WA_BPDK_STR-CPUDT sy-vline 
WA_BPDK_STR-BUDAT sy-vline 
WA_BPDK_STR-PERIO sy-vline 
WA_BPDK_STR-BLDAT sy-vline 
WA_BPDK_STR-VADAT sy-vline 
WA_BPDK_STR-VERANT sy-vline 
WA_BPDK_STR-USNAM sy-vline 
WA_BPDK_STR-VALKEY sy-vline 
WA_BPDK_STR-BSTAT sy-vline 
WA_BPDK_STR-FCODE sy-vline 
WA_BPDK_STR-REASON sy-vline 
WA_BPDK_STR-RSTAT sy-vline 
WA_BPDK_STR-REV_DOCNR sy-vline 
WA_BPDK_STR-RPUBLAW sy-vline 
WA_BPDK_STR-RLEGIS sy-vline 
WA_BPDK_STR-RCOHORT sy-vline 
WA_BPDK_STR-DOCTYPE sy-vline 
WA_BPDK_STR-AWORG sy-vline 
WA_BPDK_STR-AWREF sy-vline 
WA_BPDK_STR-AWSYS sy-vline 
WA_BPDK_STR-AWTYP sy-vline 
WA_BPDK_STR-/SAPF15/STATUS sy-vline 
WA_BPDK_STR-SRC_BELNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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