ABAP Select data from SAP table /SCWM/S_NODE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_NODE
*  INTO TABLE @DATA(IT_/SCWM/S_NODE2).
*--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_/SCWM/S_NODE INDEX 1 INTO DATA(WA_/SCWM/S_NODE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_NODE>-NODE = 1.
</SCWM/S_NODE>-PARENT = 1.
</SCWM/S_NODE>-NODE_PRF = 1.
</SCWM/S_NODE>-OBCLS = 1.
</SCWM/S_NODE>-LIST_FM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_NODE-LIST_TT, sy-vline,
  WA_/SCWM/S_NODE-FORM_FM, sy-vline,
  WA_/SCWM/S_NODE-FORM_ST, sy-vline,
  WA_/SCWM/S_NODE-DYNP_PR, sy-vline,
  WA_/SCWM/S_NODE-DYNP_NR, sy-vline,
  WA_/SCWM/S_NODE-DISABLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_NODE 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_/SCWM/S_NODE 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_/SCWM/S_NODE INTO WA_/SCWM/S_NODE.


*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 TSTWH, internal->external for field LAST_REFRESH
CALL FUNCTION 'CONVERSION_EXIT_TSTWH_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_NODE-LAST_REFRESH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_NODE-LAST_REFRESH.
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_/SCWM/S_NODE_STR, 
NODE TYPE STRING,
PARENT TYPE STRING,
NODE_PRF TYPE STRING,
OBCLS TYPE STRING,
LIST_FM TYPE STRING,
LIST_TT TYPE STRING,
FORM_FM TYPE STRING,
FORM_ST TYPE STRING,
DYNP_PR TYPE STRING,
DYNP_NR TYPE STRING,
DISABLE TYPE STRING,
VISIBILITY TYPE STRING,
LIST_ST TYPE STRING,
PBTEXT TYPE STRING,
PTEXT TYPE STRING,
TEXT TYPE STRING,
FLG_VARIANT TYPE STRING,
CATEGORY TYPE STRING,
NODE_SUPER TYPE STRING,
VARID TYPE STRING,
LAYOUT TYPE STRING,
OBJECTS TYPE STRING,
RANGE TYPE STRING,
STRUCTURE TYPE STRING,
TABLETYPE TYPE STRING,
FIELDCAT TYPE STRING,
FLG_HOTSPOT_SET TYPE STRING,
DEMO_DATA TYPE STRING,
ORIG_MON TYPE STRING,
BATCH_DATA TYPE STRING,
SHOW_SEL TYPE STRING,
LAST_REFRESH TYPE STRING,
REFRESH_MIN TYPE STRING,
REFRESH_FAILED TYPE STRING,
REFRESH_OBJECTS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_NODE_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_/SCWM/S_NODE_STR-NODE sy-vline 
WA_/SCWM/S_NODE_STR-PARENT sy-vline 
WA_/SCWM/S_NODE_STR-NODE_PRF sy-vline 
WA_/SCWM/S_NODE_STR-OBCLS sy-vline 
WA_/SCWM/S_NODE_STR-LIST_FM sy-vline 
WA_/SCWM/S_NODE_STR-LIST_TT sy-vline 
WA_/SCWM/S_NODE_STR-FORM_FM sy-vline 
WA_/SCWM/S_NODE_STR-FORM_ST sy-vline 
WA_/SCWM/S_NODE_STR-DYNP_PR sy-vline 
WA_/SCWM/S_NODE_STR-DYNP_NR sy-vline 
WA_/SCWM/S_NODE_STR-DISABLE sy-vline 
WA_/SCWM/S_NODE_STR-VISIBILITY sy-vline 
WA_/SCWM/S_NODE_STR-LIST_ST sy-vline 
WA_/SCWM/S_NODE_STR-PBTEXT sy-vline 
WA_/SCWM/S_NODE_STR-PTEXT sy-vline 
WA_/SCWM/S_NODE_STR-TEXT sy-vline 
WA_/SCWM/S_NODE_STR-FLG_VARIANT sy-vline 
WA_/SCWM/S_NODE_STR-CATEGORY sy-vline 
WA_/SCWM/S_NODE_STR-NODE_SUPER sy-vline 
WA_/SCWM/S_NODE_STR-VARID sy-vline 
WA_/SCWM/S_NODE_STR-LAYOUT sy-vline 
WA_/SCWM/S_NODE_STR-OBJECTS sy-vline 
WA_/SCWM/S_NODE_STR-RANGE sy-vline 
WA_/SCWM/S_NODE_STR-STRUCTURE sy-vline 
WA_/SCWM/S_NODE_STR-TABLETYPE sy-vline 
WA_/SCWM/S_NODE_STR-FIELDCAT sy-vline 
WA_/SCWM/S_NODE_STR-FLG_HOTSPOT_SET sy-vline 
WA_/SCWM/S_NODE_STR-DEMO_DATA sy-vline 
WA_/SCWM/S_NODE_STR-ORIG_MON sy-vline 
WA_/SCWM/S_NODE_STR-BATCH_DATA sy-vline 
WA_/SCWM/S_NODE_STR-SHOW_SEL sy-vline 
WA_/SCWM/S_NODE_STR-LAST_REFRESH sy-vline 
WA_/SCWM/S_NODE_STR-REFRESH_MIN sy-vline 
WA_/SCWM/S_NODE_STR-REFRESH_FAILED sy-vline 
WA_/SCWM/S_NODE_STR-REFRESH_OBJECTS sy-vline      INTO ld_text SEPARATED BY SPACE.

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