ABAP Select data from SAP table SMSSQ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SMSSQ
*  INTO TABLE @DATA(IT_SMSSQ2).
*--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_SMSSQ INDEX 1 INTO DATA(WA_SMSSQ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SMSSQ>-MATNR = 1.
<SMSSQ>-WERKS = 1.
<SMSSQ>-SOBKZ = 1.
<SMSSQ>-PSPNR = 1.
<SMSSQ>-RMSSQ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SMSSQ-XDBUP, sy-vline,
  WA_SMSSQ-LFGJA, sy-vline,
  WA_SMSSQ-LFMON, sy-vline,
  WA_SMSSQ-SQLAB, sy-vline,
  WA_SMSSQ-SQINS, sy-vline,
  WA_SMSSQ-SQSPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SMSSQ 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_SMSSQ 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_SMSSQ INTO WA_SMSSQ.


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

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_SMSSQ-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SMSSQ-PSPNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field SQGJA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_SMSSQ-SQGJA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SMSSQ-SQGJA.
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_SMSSQ_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
SOBKZ TYPE STRING,
PSPNR TYPE STRING,
RMSSQ TYPE STRING,
XDBUP TYPE STRING,
LFGJA TYPE STRING,
LFMON TYPE STRING,
SQLAB TYPE STRING,
SQINS TYPE STRING,
SQSPE TYPE STRING,
SQEIN TYPE STRING,
SQLAB_OLD TYPE STRING,
SQINS_OLD TYPE STRING,
SQSPE_OLD TYPE STRING,
SQEIN_OLD TYPE STRING,
KZBWS TYPE STRING,
SQTRA TYPE STRING,
SQTRA_OLD TYPE STRING,
SQVTR TYPE STRING,
SQVTR_OLD TYPE STRING,
RMSSQH TYPE STRING,
SQLFM TYPE STRING,
SQGJA TYPE STRING,
SQRUE TYPE STRING,
SQBWE TYPE STRING,
SQBWE_OLD TYPE STRING,
SQVBW TYPE STRING,
SQVBW_OLD TYPE STRING,
/CWM/SQLAB TYPE STRING,
/CWM/SQINS TYPE STRING,
/CWM/SQSPE TYPE STRING,
/CWM/SQEIN TYPE STRING,
/CWM/SQTRA TYPE STRING,
/CWM/SQBWE TYPE STRING,
/CWM/SQLAB_OLD TYPE STRING,
/CWM/SQINS_OLD TYPE STRING,
/CWM/SQSPE_OLD TYPE STRING,
/CWM/SQEIN_OLD TYPE STRING,
/CWM/SQTRA_OLD TYPE STRING,
/CWM/SQVTR_OLD TYPE STRING,
/CWM/SQBWE_OLD TYPE STRING,
/CWM/SQVBW_OLD TYPE STRING,
/CWM/SQVTR TYPE STRING,
/CWM/SQVBW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SMSSQ_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_SMSSQ_STR-MATNR sy-vline 
WA_SMSSQ_STR-WERKS sy-vline 
WA_SMSSQ_STR-SOBKZ sy-vline 
WA_SMSSQ_STR-PSPNR sy-vline 
WA_SMSSQ_STR-RMSSQ sy-vline 
WA_SMSSQ_STR-XDBUP sy-vline 
WA_SMSSQ_STR-LFGJA sy-vline 
WA_SMSSQ_STR-LFMON sy-vline 
WA_SMSSQ_STR-SQLAB sy-vline 
WA_SMSSQ_STR-SQINS sy-vline 
WA_SMSSQ_STR-SQSPE sy-vline 
WA_SMSSQ_STR-SQEIN sy-vline 
WA_SMSSQ_STR-SQLAB_OLD sy-vline 
WA_SMSSQ_STR-SQINS_OLD sy-vline 
WA_SMSSQ_STR-SQSPE_OLD sy-vline 
WA_SMSSQ_STR-SQEIN_OLD sy-vline 
WA_SMSSQ_STR-KZBWS sy-vline 
WA_SMSSQ_STR-SQTRA sy-vline 
WA_SMSSQ_STR-SQTRA_OLD sy-vline 
WA_SMSSQ_STR-SQVTR sy-vline 
WA_SMSSQ_STR-SQVTR_OLD sy-vline 
WA_SMSSQ_STR-RMSSQH sy-vline 
WA_SMSSQ_STR-SQLFM sy-vline 
WA_SMSSQ_STR-SQGJA sy-vline 
WA_SMSSQ_STR-SQRUE sy-vline 
WA_SMSSQ_STR-SQBWE sy-vline 
WA_SMSSQ_STR-SQBWE_OLD sy-vline 
WA_SMSSQ_STR-SQVBW sy-vline 
WA_SMSSQ_STR-SQVBW_OLD sy-vline 
WA_SMSSQ_STR-/CWM/SQLAB sy-vline 
WA_SMSSQ_STR-/CWM/SQINS sy-vline 
WA_SMSSQ_STR-/CWM/SQSPE sy-vline 
WA_SMSSQ_STR-/CWM/SQEIN sy-vline 
WA_SMSSQ_STR-/CWM/SQTRA sy-vline 
WA_SMSSQ_STR-/CWM/SQBWE sy-vline 
WA_SMSSQ_STR-/CWM/SQLAB_OLD sy-vline 
WA_SMSSQ_STR-/CWM/SQINS_OLD sy-vline 
WA_SMSSQ_STR-/CWM/SQSPE_OLD sy-vline 
WA_SMSSQ_STR-/CWM/SQEIN_OLD sy-vline 
WA_SMSSQ_STR-/CWM/SQTRA_OLD sy-vline 
WA_SMSSQ_STR-/CWM/SQVTR_OLD sy-vline 
WA_SMSSQ_STR-/CWM/SQBWE_OLD sy-vline 
WA_SMSSQ_STR-/CWM/SQVBW_OLD sy-vline 
WA_SMSSQ_STR-/CWM/SQVTR sy-vline 
WA_SMSSQ_STR-/CWM/SQVBW sy-vline      INTO ld_text SEPARATED BY SPACE.

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