ABAP Select data from SAP table /IWNGW/S_NOTIF_TEMP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /IWNGW/S_NOTIF_TEMP 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 /IWNGW/S_NOTIF_TEMP. 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 /IWNGW/S_NOTIF_TEMP 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_/IWNGW/S_NOTIF_TEMP TYPE STANDARD TABLE OF /IWNGW/S_NOTIF_TEMP,
      WA_/IWNGW/S_NOTIF_TEMP TYPE /IWNGW/S_NOTIF_TEMP,
      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: </IWNGW/S_NOTIF_TEMP> TYPE /IWNGW/S_NOTIF_TEMP.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /IWNGW/S_NOTIF_TEMP
  INTO TABLE IT_/IWNGW/S_NOTIF_TEMP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /IWNGW/S_NOTIF_TEMP
*  INTO TABLE @DATA(IT_/IWNGW/S_NOTIF_TEMP2).
*--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_/IWNGW/S_NOTIF_TEMP INDEX 1 INTO DATA(WA_/IWNGW/S_NOTIF_TEMP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/IWNGW/S_NOTIF_TEMP ASSIGNING </IWNGW/S_NOTIF_TEMP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</IWNGW/S_NOTIF_TEMP>-ID = 1.
</IWNGW/S_NOTIF_TEMP>-ORIGIN_ID = 1.
</IWNGW/S_NOTIF_TEMP>-CREATED_AT = 1.
</IWNGW/S_NOTIF_TEMP>-IS_ACTIONABLE = 1.
</IWNGW/S_NOTIF_TEMP>-IS_READ = 1.

ENDLOOP.

LOOP AT IT_/IWNGW/S_NOTIF_TEMP INTO WA_/IWNGW/S_NOTIF_TEMP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/IWNGW/S_NOTIF_TEMP-IS_GROUPABLE, sy-vline,
  WA_/IWNGW/S_NOTIF_TEMP-IS_GROUP_HEADER, sy-vline,
  WA_/IWNGW/S_NOTIF_TEMP-NAV_TARGET_ACTION, sy-vline,
  WA_/IWNGW/S_NOTIF_TEMP-NAV_TARGET_OBJECT, sy-vline,
  WA_/IWNGW/S_NOTIF_TEMP-TYPE_ID, sy-vline,
  WA_/IWNGW/S_NOTIF_TEMP-TYPE_KEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/IWNGW/S_NOTIF_TEMP 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_/IWNGW/S_NOTIF_TEMP 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_/IWNGW/S_NOTIF_TEMP INTO WA_/IWNGW/S_NOTIF_TEMP.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_/IWNGW/S_NOTIF_TEMP_STR, 
ID TYPE STRING,
ORIGIN_ID TYPE STRING,
CREATED_AT TYPE STRING,
IS_ACTIONABLE TYPE STRING,
IS_READ TYPE STRING,
IS_GROUPABLE TYPE STRING,
IS_GROUP_HEADER TYPE STRING,
NAV_TARGET_ACTION TYPE STRING,
NAV_TARGET_OBJECT TYPE STRING,
TYPE_ID TYPE STRING,
TYPE_KEY TYPE STRING,
TYPE_PARENT_ID TYPE STRING,
PRIORITY TYPE STRING,
TITLE TYPE STRING,
TEXT TYPE STRING,
ACTOR TYPE STRING,
ID TYPE STRING,
DISPLAY_TEXT TYPE STRING,
IMAGE_URL TYPE STRING,
GROUP_TEXT TYPE STRING,
GROUP_COUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/IWNGW/S_NOTIF_TEMP_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_/IWNGW/S_NOTIF_TEMP_STR-ID sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-ORIGIN_ID sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-CREATED_AT sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-IS_ACTIONABLE sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-IS_READ sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-IS_GROUPABLE sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-IS_GROUP_HEADER sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-NAV_TARGET_ACTION sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-NAV_TARGET_OBJECT sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-TYPE_ID sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-TYPE_KEY sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-TYPE_PARENT_ID sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-PRIORITY sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-TITLE sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-TEXT sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-ACTOR sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-ID sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-DISPLAY_TEXT sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-IMAGE_URL sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-GROUP_TEXT sy-vline 
WA_/IWNGW/S_NOTIF_TEMP_STR-GROUP_COUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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