ABAP Select data from SAP table BFSTOCK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BFSTOCK
*  INTO TABLE @DATA(IT_BFSTOCK2).
*--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_BFSTOCK INDEX 1 INTO DATA(WA_BFSTOCK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BFSTOCK>-MATNR = 1.
<BFSTOCK>-WERKS = 1.
<BFSTOCK>-LGORT = 1.
<BFSTOCK>-CHARG = 1.
<BFSTOCK>-BWTAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BFSTOCK-SOBKZ, sy-vline,
  WA_BFSTOCK-LIFNR, sy-vline,
  WA_BFSTOCK-MENGE, sy-vline,
  WA_BFSTOCK-MEINS, sy-vline,
  WA_BFSTOCK-ERFMG, sy-vline,
  WA_BFSTOCK-ERFME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BFSTOCK 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_BFSTOCK 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_BFSTOCK INTO WA_BFSTOCK.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_BFSTOCK-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BFSTOCK-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BFSTOCK-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BFSTOCK-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BFSTOCK-ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BFSTOCK-ERFME.
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_BFSTOCK_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
BWTAR TYPE STRING,
SOBKZ TYPE STRING,
LIFNR TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
VRFMG TYPE STRING,
KZUPD TYPE STRING,
SUBRC TYPE STRING,
POSNR TYPE STRING,
LOBM_BPRIO TYPE STRING,
TABIX_INT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BFSTOCK_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_BFSTOCK_STR-MATNR sy-vline 
WA_BFSTOCK_STR-WERKS sy-vline 
WA_BFSTOCK_STR-LGORT sy-vline 
WA_BFSTOCK_STR-CHARG sy-vline 
WA_BFSTOCK_STR-BWTAR sy-vline 
WA_BFSTOCK_STR-SOBKZ sy-vline 
WA_BFSTOCK_STR-LIFNR sy-vline 
WA_BFSTOCK_STR-MENGE sy-vline 
WA_BFSTOCK_STR-MEINS sy-vline 
WA_BFSTOCK_STR-ERFMG sy-vline 
WA_BFSTOCK_STR-ERFME sy-vline 
WA_BFSTOCK_STR-UMREZ sy-vline 
WA_BFSTOCK_STR-UMREN sy-vline 
WA_BFSTOCK_STR-VRFMG sy-vline 
WA_BFSTOCK_STR-KZUPD sy-vline 
WA_BFSTOCK_STR-SUBRC sy-vline 
WA_BFSTOCK_STR-POSNR sy-vline 
WA_BFSTOCK_STR-LOBM_BPRIO sy-vline 
WA_BFSTOCK_STR-TABIX_INT sy-vline      INTO ld_text SEPARATED BY SPACE.

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