ABAP Select data from SAP table SNODE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SNODE
*  INTO TABLE @DATA(IT_SNODE2).
*--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_SNODE INDEX 1 INTO DATA(WA_SNODE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SNODE>-ID = 1.
<SNODE>-TYPE = 1.
<SNODE>-NAME = 1.
<SNODE>-PARENT = 1.
<SNODE>-CHILD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SNODE-NEXT, sy-vline,
  WA_SNODE-TLEVEL, sy-vline,
  WA_SNODE-TLOCK, sy-vline,
  WA_SNODE-STATUS, sy-vline,
  WA_SNODE-INCLUDE, sy-vline,
  WA_SNODE-LINK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SNODE 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_SNODE 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_SNODE INTO WA_SNODE.


*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_SNODE_STR, 
ID TYPE STRING,
TYPE TYPE STRING,
NAME TYPE STRING,
PARENT TYPE STRING,
CHILD TYPE STRING,
NEXT TYPE STRING,
TLEVEL TYPE STRING,
TLOCK TYPE STRING,
STATUS TYPE STRING,
INCLUDE TYPE STRING,
LINK TYPE STRING,
NAME2 TYPE STRING,
EXPOSURE TYPE STRING,
NAME3 TYPE STRING,
LONG_NAME TYPE STRING,
ICON TYPE STRING,
IS_FINAL TYPE STRING,
IS_ABSTRACT TYPE STRING,
IS_FOR_TESTING TYPE STRING,
IS_EVENT_HANDLER TYPE STRING,
IS_CONSTRUCTOR TYPE STRING,
IS_REDEFINITION TYPE STRING,
IS_STATIC TYPE STRING,
IS_READ_ONLY TYPE STRING,
IS_CONSTANT TYPE STRING,
ROW TYPE STRING,
COL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SNODE_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_SNODE_STR-ID sy-vline 
WA_SNODE_STR-TYPE sy-vline 
WA_SNODE_STR-NAME sy-vline 
WA_SNODE_STR-PARENT sy-vline 
WA_SNODE_STR-CHILD sy-vline 
WA_SNODE_STR-NEXT sy-vline 
WA_SNODE_STR-TLEVEL sy-vline 
WA_SNODE_STR-TLOCK sy-vline 
WA_SNODE_STR-STATUS sy-vline 
WA_SNODE_STR-INCLUDE sy-vline 
WA_SNODE_STR-LINK sy-vline 
WA_SNODE_STR-NAME2 sy-vline 
WA_SNODE_STR-EXPOSURE sy-vline 
WA_SNODE_STR-NAME3 sy-vline 
WA_SNODE_STR-LONG_NAME sy-vline 
WA_SNODE_STR-ICON sy-vline 
WA_SNODE_STR-IS_FINAL sy-vline 
WA_SNODE_STR-IS_ABSTRACT sy-vline 
WA_SNODE_STR-IS_FOR_TESTING sy-vline 
WA_SNODE_STR-IS_EVENT_HANDLER sy-vline 
WA_SNODE_STR-IS_CONSTRUCTOR sy-vline 
WA_SNODE_STR-IS_REDEFINITION sy-vline 
WA_SNODE_STR-IS_STATIC sy-vline 
WA_SNODE_STR-IS_READ_ONLY sy-vline 
WA_SNODE_STR-IS_CONSTANT sy-vline 
WA_SNODE_STR-ROW sy-vline 
WA_SNODE_STR-COL sy-vline      INTO ld_text SEPARATED BY SPACE.

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