ABAP Select data from SAP table BPGE4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BPGE4 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 BPGE4. 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 BPGE4 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_BPGE4 TYPE STANDARD TABLE OF BPGE4,
      WA_BPGE4 TYPE BPGE4,
      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: <BPGE4> TYPE BPGE4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BPGE4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BPGE4
  INTO TABLE IT_BPGE4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BPGE4
*  INTO TABLE @DATA(IT_BPGE42).
*--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_BPGE4 INDEX 1 INTO DATA(WA_BPGE42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BPGE4 ASSIGNING <BPGE4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BPGE4>-MANDT = 1.
<BPGE4>-LEDNR = 1.
<BPGE4>-OBJNR = 1.
<BPGE4>-POSIT = 1.
<BPGE4>-TRGKZ = 1.

ENDLOOP.

LOOP AT IT_BPGE4 INTO WA_BPGE4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BPGE4-WRTTP, sy-vline,
  WA_BPGE4-GEBER, sy-vline,
  WA_BPGE4-VERSN, sy-vline,
  WA_BPGE4-VORGA, sy-vline,
  WA_BPGE4-TWAER, sy-vline,
  WA_BPGE4-SUBVO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BPGE4 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_BPGE4 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_BPGE4 INTO WA_BPGE4.


*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 NUMCV, internal->external for field LEDNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_BPGE4-LEDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BPGE4-LEDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WRTTP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BPGE4-WRTTP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BPGE4-WRTTP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BPGE4-VERSN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BPGE4-VERSN.
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_BPGE4_STR, 
MANDT TYPE STRING,
LEDNR TYPE STRING,
OBJNR TYPE STRING,
POSIT TYPE STRING,
TRGKZ TYPE STRING,
WRTTP TYPE STRING,
GEBER TYPE STRING,
VERSN TYPE STRING,
VORGA TYPE STRING,
TWAER TYPE STRING,
SUBVO TYPE STRING,
FAREA TYPE STRING,
WTGES TYPE STRING,
WLGES TYPE STRING,
WTGEV TYPE STRING,
WLGEV TYPE STRING,
KALNR TYPE STRING,
KLVAR TYPE STRING,
BELTP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BPGE4_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_BPGE4_STR-MANDT sy-vline 
WA_BPGE4_STR-LEDNR sy-vline 
WA_BPGE4_STR-OBJNR sy-vline 
WA_BPGE4_STR-POSIT sy-vline 
WA_BPGE4_STR-TRGKZ sy-vline 
WA_BPGE4_STR-WRTTP sy-vline 
WA_BPGE4_STR-GEBER sy-vline 
WA_BPGE4_STR-VERSN sy-vline 
WA_BPGE4_STR-VORGA sy-vline 
WA_BPGE4_STR-TWAER sy-vline 
WA_BPGE4_STR-SUBVO sy-vline 
WA_BPGE4_STR-FAREA sy-vline 
WA_BPGE4_STR-WTGES sy-vline 
WA_BPGE4_STR-WLGES sy-vline 
WA_BPGE4_STR-WTGEV sy-vline 
WA_BPGE4_STR-WLGEV sy-vline 
WA_BPGE4_STR-KALNR sy-vline 
WA_BPGE4_STR-KLVAR sy-vline 
WA_BPGE4_STR-BELTP sy-vline      INTO ld_text SEPARATED BY SPACE.

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