ABAP Select data from SAP table MBSTOCKKEY_EXT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MBSTOCKKEY_EXT
*  INTO TABLE @DATA(IT_MBSTOCKKEY_EXT2).
*--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_MBSTOCKKEY_EXT INDEX 1 INTO DATA(WA_MBSTOCKKEY_EXT2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MBSTOCKKEY_EXT-LIFNR, sy-vline,
  WA_MBSTOCKKEY_EXT-KUNNR, sy-vline,
  WA_MBSTOCKKEY_EXT-VBELN, sy-vline,
  WA_MBSTOCKKEY_EXT-POSNR, sy-vline,
  WA_MBSTOCKKEY_EXT-PSPNR, sy-vline,
  WA_MBSTOCKKEY_EXT-BSTTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MBSTOCKKEY_EXT 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_MBSTOCKKEY_EXT 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_MBSTOCKKEY_EXT INTO WA_MBSTOCKKEY_EXT.


*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 MATN5, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN5_OUTPUT'
  EXPORTING
    input =                      WA_MBSTOCKKEY_EXT-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MBSTOCKKEY_EXT-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_MBSTOCKKEY_EXT-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MBSTOCKKEY_EXT-PSPNR.
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_MBSTOCKKEY_EXT_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
PSPNR TYPE STRING,
BSTTYP TYPE STRING,
MATNR_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MBSTOCKKEY_EXT_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_MBSTOCKKEY_EXT_STR-MATNR sy-vline 
WA_MBSTOCKKEY_EXT_STR-WERKS sy-vline 
WA_MBSTOCKKEY_EXT_STR-LGORT sy-vline 
WA_MBSTOCKKEY_EXT_STR-CHARG sy-vline 
WA_MBSTOCKKEY_EXT_STR-SOBKZ sy-vline 
WA_MBSTOCKKEY_EXT_STR-LIFNR sy-vline 
WA_MBSTOCKKEY_EXT_STR-KUNNR sy-vline 
WA_MBSTOCKKEY_EXT_STR-VBELN sy-vline 
WA_MBSTOCKKEY_EXT_STR-POSNR sy-vline 
WA_MBSTOCKKEY_EXT_STR-PSPNR sy-vline 
WA_MBSTOCKKEY_EXT_STR-BSTTYP sy-vline 
WA_MBSTOCKKEY_EXT_STR-MATNR_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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