ABAP Select data from SAP table IEWMSTKMATBAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEWMSTKMATBAT
*  INTO TABLE @DATA(IT_IEWMSTKMATBAT2).
*--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_IEWMSTKMATBAT INDEX 1 INTO DATA(WA_IEWMSTKMATBAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEWMSTKMATBAT>-MANDT = 1.
<IEWMSTKMATBAT>-WAREHOUSE = 1.
<IEWMSTKMATBAT>-PRODUCTUUID = 1.
<IEWMSTKMATBAT>-BATCHUUID = 1.
<IEWMSTKMATBAT>-STOCKTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEWMSTKMATBAT-STOCKUSAGE, sy-vline,
  WA_IEWMSTKMATBAT-STOCKOWNER, sy-vline,
  WA_IEWMSTKMATBAT-STOCKOWNERPARTNERROLE, sy-vline,
  WA_IEWMSTKMATBAT-ENTITLEDTODISPOSEPARTY, sy-vline,
  WA_IEWMSTKMATBAT-ENTITLEDTODISPOSEPARTNERROLE, sy-vline,
  WA_IEWMSTKMATBAT-COUNTERFORSTOCKSEPARATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IEWMSTKMATBAT 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_IEWMSTKMATBAT 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_IEWMSTKMATBAT INTO WA_IEWMSTKMATBAT.


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

*Conversion exit ALPHA, internal->external for field ENTITLEDTODISPOSEPARTY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IEWMSTKMATBAT-ENTITLEDTODISPOSEPARTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEWMSTKMATBAT-ENTITLEDTODISPOSEPARTY.
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_IEWMSTKMATBAT_STR, 
MANDT TYPE STRING,
WAREHOUSE TYPE STRING,
PRODUCTUUID TYPE STRING,
BATCHUUID TYPE STRING,
STOCKTYPE TYPE STRING,
STOCKUSAGE TYPE STRING,
STOCKOWNER TYPE STRING,
STOCKOWNERPARTNERROLE TYPE STRING,
ENTITLEDTODISPOSEPARTY TYPE STRING,
ENTITLEDTODISPOSEPARTNERROLE TYPE STRING,
COUNTERFORSTOCKSEPARATION TYPE STRING,
STOCKITEMUUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEWMSTKMATBAT_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_IEWMSTKMATBAT_STR-MANDT sy-vline 
WA_IEWMSTKMATBAT_STR-WAREHOUSE sy-vline 
WA_IEWMSTKMATBAT_STR-PRODUCTUUID sy-vline 
WA_IEWMSTKMATBAT_STR-BATCHUUID sy-vline 
WA_IEWMSTKMATBAT_STR-STOCKTYPE sy-vline 
WA_IEWMSTKMATBAT_STR-STOCKUSAGE sy-vline 
WA_IEWMSTKMATBAT_STR-STOCKOWNER sy-vline 
WA_IEWMSTKMATBAT_STR-STOCKOWNERPARTNERROLE sy-vline 
WA_IEWMSTKMATBAT_STR-ENTITLEDTODISPOSEPARTY sy-vline 
WA_IEWMSTKMATBAT_STR-ENTITLEDTODISPOSEPARTNERROLE sy-vline 
WA_IEWMSTKMATBAT_STR-COUNTERFORSTOCKSEPARATION sy-vline 
WA_IEWMSTKMATBAT_STR-STOCKITEMUUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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