ABAP Select data from SAP table SMSSA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SMSSA
*  INTO TABLE @DATA(IT_SMSSA2).
*--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_SMSSA INDEX 1 INTO DATA(WA_SMSSA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SMSSA>-MATNR = 1.
<SMSSA>-WERKS = 1.
<SMSSA>-SOBKZ = 1.
<SMSSA>-VBELN = 1.
<SMSSA>-POSNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SMSSA-RMSSA, sy-vline,
  WA_SMSSA-XDBUP, sy-vline,
  WA_SMSSA-LFGJA, sy-vline,
  WA_SMSSA-LFMON, sy-vline,
  WA_SMSSA-SALAB, sy-vline,
  WA_SMSSA-SAINS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SMSSA 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_SMSSA 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_SMSSA INTO WA_SMSSA.


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

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

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

*Conversion exit GJAHR, internal->external for field SAGJA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_SMSSA-SAGJA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SMSSA-SAGJA.
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_SMSSA_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
SOBKZ TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
RMSSA TYPE STRING,
XDBUP TYPE STRING,
LFGJA TYPE STRING,
LFMON TYPE STRING,
SALAB TYPE STRING,
SAINS TYPE STRING,
SASPE TYPE STRING,
SAEIN TYPE STRING,
SALAB_OLD TYPE STRING,
SAINS_OLD TYPE STRING,
SASPE_OLD TYPE STRING,
SAEIN_OLD TYPE STRING,
KZBWS TYPE STRING,
SATRA TYPE STRING,
SATRA_OLD TYPE STRING,
SAVTR TYPE STRING,
SAVTR_OLD TYPE STRING,
RMSSAH TYPE STRING,
SALFM TYPE STRING,
SAGJA TYPE STRING,
SARUE TYPE STRING,
SABWE TYPE STRING,
SABWE_OLD TYPE STRING,
SAVBW TYPE STRING,
SAVBW_OLD TYPE STRING,
/CWM/SALAB TYPE STRING,
/CWM/SAINS TYPE STRING,
/CWM/SASPE TYPE STRING,
/CWM/SAEIN TYPE STRING,
/CWM/SATRA TYPE STRING,
/CWM/SABWE TYPE STRING,
/CWM/SALAB_OLD TYPE STRING,
/CWM/SAINS_OLD TYPE STRING,
/CWM/SASPE_OLD TYPE STRING,
/CWM/SAEIN_OLD TYPE STRING,
/CWM/SATRA_OLD TYPE STRING,
/CWM/SAVTR_OLD TYPE STRING,
/CWM/SABWE_OLD TYPE STRING,
/CWM/SAVBW_OLD TYPE STRING,
/CWM/SAVTR TYPE STRING,
/CWM/SAVBW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SMSSA_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_SMSSA_STR-MATNR sy-vline 
WA_SMSSA_STR-WERKS sy-vline 
WA_SMSSA_STR-SOBKZ sy-vline 
WA_SMSSA_STR-VBELN sy-vline 
WA_SMSSA_STR-POSNR sy-vline 
WA_SMSSA_STR-RMSSA sy-vline 
WA_SMSSA_STR-XDBUP sy-vline 
WA_SMSSA_STR-LFGJA sy-vline 
WA_SMSSA_STR-LFMON sy-vline 
WA_SMSSA_STR-SALAB sy-vline 
WA_SMSSA_STR-SAINS sy-vline 
WA_SMSSA_STR-SASPE sy-vline 
WA_SMSSA_STR-SAEIN sy-vline 
WA_SMSSA_STR-SALAB_OLD sy-vline 
WA_SMSSA_STR-SAINS_OLD sy-vline 
WA_SMSSA_STR-SASPE_OLD sy-vline 
WA_SMSSA_STR-SAEIN_OLD sy-vline 
WA_SMSSA_STR-KZBWS sy-vline 
WA_SMSSA_STR-SATRA sy-vline 
WA_SMSSA_STR-SATRA_OLD sy-vline 
WA_SMSSA_STR-SAVTR sy-vline 
WA_SMSSA_STR-SAVTR_OLD sy-vline 
WA_SMSSA_STR-RMSSAH sy-vline 
WA_SMSSA_STR-SALFM sy-vline 
WA_SMSSA_STR-SAGJA sy-vline 
WA_SMSSA_STR-SARUE sy-vline 
WA_SMSSA_STR-SABWE sy-vline 
WA_SMSSA_STR-SABWE_OLD sy-vline 
WA_SMSSA_STR-SAVBW sy-vline 
WA_SMSSA_STR-SAVBW_OLD sy-vline 
WA_SMSSA_STR-/CWM/SALAB sy-vline 
WA_SMSSA_STR-/CWM/SAINS sy-vline 
WA_SMSSA_STR-/CWM/SASPE sy-vline 
WA_SMSSA_STR-/CWM/SAEIN sy-vline 
WA_SMSSA_STR-/CWM/SATRA sy-vline 
WA_SMSSA_STR-/CWM/SABWE sy-vline 
WA_SMSSA_STR-/CWM/SALAB_OLD sy-vline 
WA_SMSSA_STR-/CWM/SAINS_OLD sy-vline 
WA_SMSSA_STR-/CWM/SASPE_OLD sy-vline 
WA_SMSSA_STR-/CWM/SAEIN_OLD sy-vline 
WA_SMSSA_STR-/CWM/SATRA_OLD sy-vline 
WA_SMSSA_STR-/CWM/SAVTR_OLD sy-vline 
WA_SMSSA_STR-/CWM/SABWE_OLD sy-vline 
WA_SMSSA_STR-/CWM/SAVBW_OLD sy-vline 
WA_SMSSA_STR-/CWM/SAVTR sy-vline 
WA_SMSSA_STR-/CWM/SAVBW sy-vline      INTO ld_text SEPARATED BY SPACE.

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