ABAP Select data from SAP table BWPOSI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BWPOSI
*  INTO TABLE @DATA(IT_BWPOSI2).
*--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_BWPOSI INDEX 1 INTO DATA(WA_BWPOSI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BWPOSI>-MANDT = 1.
<BWPOSI>-LAUFD = 1.
<BWPOSI>-LAUFI = 1.
<BWPOSI>-UMBWM = 1.
<BWPOSI>-ZBUKR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BWPOSI-GRUPPE, sy-vline,
  WA_BWPOSI-KOART, sy-vline,
  WA_BWPOSI-KUNNR, sy-vline,
  WA_BWPOSI-LIFNR, sy-vline,
  WA_BWPOSI-BUKRS, sy-vline,
  WA_BWPOSI-BELNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BWPOSI 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_BWPOSI 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_BWPOSI INTO WA_BWPOSI.


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

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

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

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

*Conversion exit AU132, internal->external for field AMOUNT
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_BWPOSI-AMOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWPOSI-AMOUNT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field AMOUNT_CALC
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_BWPOSI-AMOUNT_CALC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWPOSI-AMOUNT_CALC.
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_BWPOSI_STR, 
MANDT TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
UMBWM TYPE STRING,
ZBUKR TYPE STRING,
GRUPPE TYPE STRING,
KOART TYPE STRING,
KUNNR TYPE STRING,
LIFNR TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
ITEM TYPE STRING,
PROV_ID TYPE STRING,
METHD_P TYPE STRING,
START_DATE TYPE STRING,
END_DATE TYPE STRING,
ACTION_ID TYPE STRING,
TRANSACTION_TYPE TYPE STRING,
ID TYPE STRING,
AMOUNT TYPE STRING,
AMOUNT_CALC TYPE STRING,
CURRENCY TYPE STRING,
ACC_ID_DEBIT TYPE STRING,
ACC_ID_CREDIT TYPE STRING,
EFFECTIVE_DATE TYPE STRING,
CALCULATED_FROM TYPE STRING,
ZINSO TYPE STRING,
INDICATOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BWPOSI_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_BWPOSI_STR-MANDT sy-vline 
WA_BWPOSI_STR-LAUFD sy-vline 
WA_BWPOSI_STR-LAUFI sy-vline 
WA_BWPOSI_STR-UMBWM sy-vline 
WA_BWPOSI_STR-ZBUKR sy-vline 
WA_BWPOSI_STR-GRUPPE sy-vline 
WA_BWPOSI_STR-KOART sy-vline 
WA_BWPOSI_STR-KUNNR sy-vline 
WA_BWPOSI_STR-LIFNR sy-vline 
WA_BWPOSI_STR-BUKRS sy-vline 
WA_BWPOSI_STR-BELNR sy-vline 
WA_BWPOSI_STR-GJAHR sy-vline 
WA_BWPOSI_STR-BUZEI sy-vline 
WA_BWPOSI_STR-ITEM sy-vline 
WA_BWPOSI_STR-PROV_ID sy-vline 
WA_BWPOSI_STR-METHD_P sy-vline 
WA_BWPOSI_STR-START_DATE sy-vline 
WA_BWPOSI_STR-END_DATE sy-vline 
WA_BWPOSI_STR-ACTION_ID sy-vline 
WA_BWPOSI_STR-TRANSACTION_TYPE sy-vline 
WA_BWPOSI_STR-ID sy-vline 
WA_BWPOSI_STR-AMOUNT sy-vline 
WA_BWPOSI_STR-AMOUNT_CALC sy-vline 
WA_BWPOSI_STR-CURRENCY sy-vline 
WA_BWPOSI_STR-ACC_ID_DEBIT sy-vline 
WA_BWPOSI_STR-ACC_ID_CREDIT sy-vline 
WA_BWPOSI_STR-EFFECTIVE_DATE sy-vline 
WA_BWPOSI_STR-CALCULATED_FROM sy-vline 
WA_BWPOSI_STR-ZINSO sy-vline 
WA_BWPOSI_STR-INDICATOR sy-vline      INTO ld_text SEPARATED BY SPACE.

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