ABAP Select data from SAP table MSKA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MSKA
*  INTO TABLE @DATA(IT_MSKA2).
*--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_MSKA INDEX 1 INTO DATA(WA_MSKA2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MSKA-SOBKZ, sy-vline,
  WA_MSKA-VBELN, sy-vline,
  WA_MSKA-POSNR, sy-vline,
  WA_MSKA-LFGJA, sy-vline,
  WA_MSKA-LFMON, sy-vline,
  WA_MSKA-KASPR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MSKA 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_MSKA 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_MSKA INTO WA_MSKA.


*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_MSKA-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSKA-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field KAJIN
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MSKA-KAJIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSKA-KAJIN.
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_MSKA_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
LFGJA TYPE STRING,
LFMON TYPE STRING,
KASPR TYPE STRING,
KALAB TYPE STRING,
KAINS TYPE STRING,
KASPE TYPE STRING,
KAVLA TYPE STRING,
KAVIN TYPE STRING,
KAVSP TYPE STRING,
KAILL TYPE STRING,
KAILQ TYPE STRING,
KAILS TYPE STRING,
KAVLL TYPE STRING,
KAVLQ TYPE STRING,
KAVLS TYPE STRING,
KAFLL TYPE STRING,
KAFLQ TYPE STRING,
KAFLS TYPE STRING,
KADLL TYPE STRING,
KAEIN TYPE STRING,
KAVEI TYPE STRING,
ERSDA TYPE STRING,
KAJIN TYPE STRING,
KARUE TYPE STRING,
SGT_SCAT TYPE STRING,
FSH_SEASON_YEAR TYPE STRING,
FSH_SEASON TYPE STRING,
FSH_COLLECTION TYPE STRING,
FSH_THEME TYPE STRING,
FSH_SALLOC_QTY TYPE STRING,
/CWM/KALAB TYPE STRING,
/CWM/KAINS TYPE STRING,
/CWM/KASPE TYPE STRING,
/CWM/KAEIN TYPE STRING,
/CWM/KAVLA TYPE STRING,
/CWM/KAVIN TYPE STRING,
/CWM/KAVSP TYPE STRING,
/CWM/KAVEI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MSKA_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_MSKA_STR-MANDT sy-vline 
WA_MSKA_STR-MATNR sy-vline 
WA_MSKA_STR-WERKS sy-vline 
WA_MSKA_STR-LGORT sy-vline 
WA_MSKA_STR-CHARG sy-vline 
WA_MSKA_STR-SOBKZ sy-vline 
WA_MSKA_STR-VBELN sy-vline 
WA_MSKA_STR-POSNR sy-vline 
WA_MSKA_STR-LFGJA sy-vline 
WA_MSKA_STR-LFMON sy-vline 
WA_MSKA_STR-KASPR sy-vline 
WA_MSKA_STR-KALAB sy-vline 
WA_MSKA_STR-KAINS sy-vline 
WA_MSKA_STR-KASPE sy-vline 
WA_MSKA_STR-KAVLA sy-vline 
WA_MSKA_STR-KAVIN sy-vline 
WA_MSKA_STR-KAVSP sy-vline 
WA_MSKA_STR-KAILL sy-vline 
WA_MSKA_STR-KAILQ sy-vline 
WA_MSKA_STR-KAILS sy-vline 
WA_MSKA_STR-KAVLL sy-vline 
WA_MSKA_STR-KAVLQ sy-vline 
WA_MSKA_STR-KAVLS sy-vline 
WA_MSKA_STR-KAFLL sy-vline 
WA_MSKA_STR-KAFLQ sy-vline 
WA_MSKA_STR-KAFLS sy-vline 
WA_MSKA_STR-KADLL sy-vline 
WA_MSKA_STR-KAEIN sy-vline 
WA_MSKA_STR-KAVEI sy-vline 
WA_MSKA_STR-ERSDA sy-vline 
WA_MSKA_STR-KAJIN sy-vline 
WA_MSKA_STR-KARUE sy-vline 
WA_MSKA_STR-SGT_SCAT sy-vline 
WA_MSKA_STR-FSH_SEASON_YEAR sy-vline 
WA_MSKA_STR-FSH_SEASON sy-vline 
WA_MSKA_STR-FSH_COLLECTION sy-vline 
WA_MSKA_STR-FSH_THEME sy-vline 
WA_MSKA_STR-FSH_SALLOC_QTY sy-vline 
WA_MSKA_STR-/CWM/KALAB sy-vline 
WA_MSKA_STR-/CWM/KAINS sy-vline 
WA_MSKA_STR-/CWM/KASPE sy-vline 
WA_MSKA_STR-/CWM/KAEIN sy-vline 
WA_MSKA_STR-/CWM/KAVLA sy-vline 
WA_MSKA_STR-/CWM/KAVIN sy-vline 
WA_MSKA_STR-/CWM/KAVSP sy-vline 
WA_MSKA_STR-/CWM/KAVEI sy-vline      INTO ld_text SEPARATED BY SPACE.

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