ABAP Select data from SAP table SMSISX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SMSISX
*  INTO TABLE @DATA(IT_SMSISX2).
*--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_SMSISX INDEX 1 INTO DATA(WA_SMSISX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SMSISX>-MATNR = 1.
<SMSISX>-WERKS = 1.
<SMSISX>-SOBKZ = 1.
<SMSISX>-LIFNR = 1.
<SMSISX>-OWNER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SMSISX-RMSIS, sy-vline,
  WA_SMSISX-XDBUP, sy-vline,
  WA_SMSISX-LFGJA, sy-vline,
  WA_SMSISX-LFMON, sy-vline,
  WA_SMSISX-ISLAB, sy-vline,
  WA_SMSISX-ISINS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SMSISX 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_SMSISX 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_SMSISX INTO WA_SMSISX.


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

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

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

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

*Conversion exit GJAHR, internal->external for field ISGJA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_SMSISX-ISGJA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SMSISX-ISGJA.
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_SMSISX_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
SOBKZ TYPE STRING,
LIFNR TYPE STRING,
OWNER TYPE STRING,
RMSIS TYPE STRING,
XDBUP TYPE STRING,
LFGJA TYPE STRING,
LFMON TYPE STRING,
ISLAB TYPE STRING,
ISINS TYPE STRING,
ISEIN TYPE STRING,
ISLAB_OLD TYPE STRING,
ISINS_OLD TYPE STRING,
ISEIN_OLD TYPE STRING,
KZBWS TYPE STRING,
ISTRA TYPE STRING,
ISTRA_OLD TYPE STRING,
ISVTR TYPE STRING,
ISVTR_OLD TYPE STRING,
RMSISH TYPE STRING,
ISLFM TYPE STRING,
ISGJA TYPE STRING,
ISRUE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SMSISX_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_SMSISX_STR-MATNR sy-vline 
WA_SMSISX_STR-WERKS sy-vline 
WA_SMSISX_STR-SOBKZ sy-vline 
WA_SMSISX_STR-LIFNR sy-vline 
WA_SMSISX_STR-OWNER sy-vline 
WA_SMSISX_STR-RMSIS sy-vline 
WA_SMSISX_STR-XDBUP sy-vline 
WA_SMSISX_STR-LFGJA sy-vline 
WA_SMSISX_STR-LFMON sy-vline 
WA_SMSISX_STR-ISLAB sy-vline 
WA_SMSISX_STR-ISINS sy-vline 
WA_SMSISX_STR-ISEIN sy-vline 
WA_SMSISX_STR-ISLAB_OLD sy-vline 
WA_SMSISX_STR-ISINS_OLD sy-vline 
WA_SMSISX_STR-ISEIN_OLD sy-vline 
WA_SMSISX_STR-KZBWS sy-vline 
WA_SMSISX_STR-ISTRA sy-vline 
WA_SMSISX_STR-ISTRA_OLD sy-vline 
WA_SMSISX_STR-ISVTR sy-vline 
WA_SMSISX_STR-ISVTR_OLD sy-vline 
WA_SMSISX_STR-RMSISH sy-vline 
WA_SMSISX_STR-ISLFM sy-vline 
WA_SMSISX_STR-ISGJA sy-vline 
WA_SMSISX_STR-ISRUE sy-vline      INTO ld_text SEPARATED BY SPACE.

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