ABAP Select data from SAP table RIWWSMODLIST_ALV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RIWWSMODLIST_ALV
*  INTO TABLE @DATA(IT_RIWWSMODLIST_ALV2).
*--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_RIWWSMODLIST_ALV INDEX 1 INTO DATA(WA_RIWWSMODLIST_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RIWWSMODLIST_ALV>-WSKEY = 1.
<RIWWSMODLIST_ALV>-WSACTION = 1.
<RIWWSMODLIST_ALV>-DOCUMENTINDEX = 1.
<RIWWSMODLIST_ALV>-DOCUMENTTYPE = 1.
<RIWWSMODLIST_ALV>-DOCUMENTNUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RIWWSMODLIST_ALV-DOCUMENTPART, sy-vline,
  WA_RIWWSMODLIST_ALV-DOCUMENTVERSION, sy-vline,
  WA_RIWWSMODLIST_ALV-DESCRIPTION, sy-vline,
  WA_RIWWSMODLIST_ALV-STATUSEXTERN, sy-vline,
  WA_RIWWSMODLIST_ALV-ICON_A_DEP, sy-vline,
  WA_RIWWSMODLIST_ALV-ICON_P_DEP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RIWWSMODLIST_ALV 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_RIWWSMODLIST_ALV 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_RIWWSMODLIST_ALV INTO WA_RIWWSMODLIST_ALV.


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

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

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RIWWSMODLIST_ALV-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RIWWSMODLIST_ALV-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field SERIALNO
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_RIWWSMODLIST_ALV-SERIALNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RIWWSMODLIST_ALV-SERIALNO.
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_RIWWSMODLIST_ALV_STR, 
WSKEY TYPE STRING,
WSACTION TYPE STRING,
DOCUMENTINDEX TYPE STRING,
DOCUMENTTYPE TYPE STRING,
DOCUMENTNUMBER TYPE STRING,
DOCUMENTPART TYPE STRING,
DOCUMENTVERSION TYPE STRING,
DESCRIPTION TYPE STRING,
STATUSEXTERN TYPE STRING,
ICON_A_DEP TYPE STRING,
ICON_P_DEP TYPE STRING,
DELETEINDICATOR TYPE STRING,
LINECOUNTER TYPE STRING,
NOTEFLAGANYLINE TYPE STRING,
CHARVALUE01 TYPE STRING,
CHARVALUE02 TYPE STRING,
CHARVALUE03 TYPE STRING,
CHARVALUE04 TYPE STRING,
CHARVALUE05 TYPE STRING,
CHARVALUE06 TYPE STRING,
CHARVALUE07 TYPE STRING,
CHARVALUE08 TYPE STRING,
CHARVALUE09 TYPE STRING,
CHARVALUE10 TYPE STRING,
CHARVALUE11 TYPE STRING,
CHARVALUE12 TYPE STRING,
CHARVALUE13 TYPE STRING,
CHARVALUE14 TYPE STRING,
CHARVALUE15 TYPE STRING,
CHARVALUE16 TYPE STRING,
CHARVALUE17 TYPE STRING,
CHARVALUE18 TYPE STRING,
CHARVALUE19 TYPE STRING,
CHARVALUE20 TYPE STRING,
LINKDEPENDENCY TYPE STRING,
LINKCHARV01 TYPE STRING,
LINKCHARV02 TYPE STRING,
LINKCHARV03 TYPE STRING,
LINKCHARV04 TYPE STRING,
LINKCHARV05 TYPE STRING,
LINKCHARV06 TYPE STRING,
LINKCHARV07 TYPE STRING,
LINKCHARV08 TYPE STRING,
LINKCHARV09 TYPE STRING,
LINKCHARV10 TYPE STRING,
LOCATION TYPE STRING,
LOCATION_GUID TYPE STRING,
LOCATION_TEXT TYPE STRING,
NOTEFLAGTHISLINE TYPE STRING,
NOTIF_NO TYPE STRING,
NOTIF_TYPE TYPE STRING,
SHORT_TEXT TYPE STRING,
NOTIF_DATE TYPE STRING,
REPORTEDBY TYPE STRING,
STATUS TYPE STRING,
USERSTATUS TYPE STRING,
MATERIAL TYPE STRING,
SERIALNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RIWWSMODLIST_ALV_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_RIWWSMODLIST_ALV_STR-WSKEY sy-vline 
WA_RIWWSMODLIST_ALV_STR-WSACTION sy-vline 
WA_RIWWSMODLIST_ALV_STR-DOCUMENTINDEX sy-vline 
WA_RIWWSMODLIST_ALV_STR-DOCUMENTTYPE sy-vline 
WA_RIWWSMODLIST_ALV_STR-DOCUMENTNUMBER sy-vline 
WA_RIWWSMODLIST_ALV_STR-DOCUMENTPART sy-vline 
WA_RIWWSMODLIST_ALV_STR-DOCUMENTVERSION sy-vline 
WA_RIWWSMODLIST_ALV_STR-DESCRIPTION sy-vline 
WA_RIWWSMODLIST_ALV_STR-STATUSEXTERN sy-vline 
WA_RIWWSMODLIST_ALV_STR-ICON_A_DEP sy-vline 
WA_RIWWSMODLIST_ALV_STR-ICON_P_DEP sy-vline 
WA_RIWWSMODLIST_ALV_STR-DELETEINDICATOR sy-vline 
WA_RIWWSMODLIST_ALV_STR-LINECOUNTER sy-vline 
WA_RIWWSMODLIST_ALV_STR-NOTEFLAGANYLINE sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE01 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE02 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE03 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE04 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE05 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE06 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE07 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE08 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE09 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE10 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE11 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE12 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE13 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE14 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE15 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE16 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE17 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE18 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE19 sy-vline 
WA_RIWWSMODLIST_ALV_STR-CHARVALUE20 sy-vline 
WA_RIWWSMODLIST_ALV_STR-LINKDEPENDENCY sy-vline 
WA_RIWWSMODLIST_ALV_STR-LINKCHARV01 sy-vline 
WA_RIWWSMODLIST_ALV_STR-LINKCHARV02 sy-vline 
WA_RIWWSMODLIST_ALV_STR-LINKCHARV03 sy-vline 
WA_RIWWSMODLIST_ALV_STR-LINKCHARV04 sy-vline 
WA_RIWWSMODLIST_ALV_STR-LINKCHARV05 sy-vline 
WA_RIWWSMODLIST_ALV_STR-LINKCHARV06 sy-vline 
WA_RIWWSMODLIST_ALV_STR-LINKCHARV07 sy-vline 
WA_RIWWSMODLIST_ALV_STR-LINKCHARV08 sy-vline 
WA_RIWWSMODLIST_ALV_STR-LINKCHARV09 sy-vline 
WA_RIWWSMODLIST_ALV_STR-LINKCHARV10 sy-vline 
WA_RIWWSMODLIST_ALV_STR-LOCATION sy-vline 
WA_RIWWSMODLIST_ALV_STR-LOCATION_GUID sy-vline 
WA_RIWWSMODLIST_ALV_STR-LOCATION_TEXT sy-vline 
WA_RIWWSMODLIST_ALV_STR-NOTEFLAGTHISLINE sy-vline 
WA_RIWWSMODLIST_ALV_STR-NOTIF_NO sy-vline 
WA_RIWWSMODLIST_ALV_STR-NOTIF_TYPE sy-vline 
WA_RIWWSMODLIST_ALV_STR-SHORT_TEXT sy-vline 
WA_RIWWSMODLIST_ALV_STR-NOTIF_DATE sy-vline 
WA_RIWWSMODLIST_ALV_STR-REPORTEDBY sy-vline 
WA_RIWWSMODLIST_ALV_STR-STATUS sy-vline 
WA_RIWWSMODLIST_ALV_STR-USERSTATUS sy-vline 
WA_RIWWSMODLIST_ALV_STR-MATERIAL sy-vline 
WA_RIWWSMODLIST_ALV_STR-SERIALNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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