ABAP Select data from SAP table CPSNODE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CPSNODE
*  INTO TABLE @DATA(IT_CPSNODE2).
*--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_CPSNODE INDEX 1 INTO DATA(WA_CPSNODE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CPSNODE>-MANDT = 1.
<CPSNODE>-PRODUCTSTRUCTURENODEUUID = 1.
<CPSNODE>-PRODUCTSTRUCTURENODEUNIQUEID = 1.
<CPSNODE>-CLASS = 1.
<CPSNODE>-CLASSNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CPSNODE-CLASSINTERNALID, sy-vline,
  WA_CPSNODE-CLASSTYPE, sy-vline,
  WA_CPSNODE-PRODUCTSTRUCLASTCHANGEDBYUSER, sy-vline,
  WA_CPSNODE-PRODUCTSTRUCLASTCHANGEDDATE, sy-vline,
  WA_CPSNODE-PRODUCTSTRUCTURECREATEDBYUSER, sy-vline,
  WA_CPSNODE-PRODUCTSTRUCTURECREATIONDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CPSNODE 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_CPSNODE 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_CPSNODE INTO WA_CPSNODE.


*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_CPSNODE_STR, 
MANDT TYPE STRING,
PRODUCTSTRUCTURENODEUUID TYPE STRING,
PRODUCTSTRUCTURENODEUNIQUEID TYPE STRING,
CLASS TYPE STRING,
CLASSNAME TYPE STRING,
CLASSINTERNALID TYPE STRING,
CLASSTYPE TYPE STRING,
PRODUCTSTRUCLASTCHANGEDBYUSER TYPE STRING,
PRODUCTSTRUCLASTCHANGEDDATE TYPE STRING,
PRODUCTSTRUCTURECREATEDBYUSER TYPE STRING,
PRODUCTSTRUCTURECREATIONDATE TYPE STRING,
PRODUCTSTRUCTURENODENAME TYPE STRING,
PRODUCTSTRUCTURENODETYPE TYPE STRING,
PRODSTRUCNODEDESCRIPTION TYPE STRING,
PRODSTRUCNODETYPEDESCRIPTION TYPE STRING,
PRODUCTSTRUCTUREGNRCOBJTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CPSNODE_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_CPSNODE_STR-MANDT sy-vline 
WA_CPSNODE_STR-PRODUCTSTRUCTURENODEUUID sy-vline 
WA_CPSNODE_STR-PRODUCTSTRUCTURENODEUNIQUEID sy-vline 
WA_CPSNODE_STR-CLASS sy-vline 
WA_CPSNODE_STR-CLASSNAME sy-vline 
WA_CPSNODE_STR-CLASSINTERNALID sy-vline 
WA_CPSNODE_STR-CLASSTYPE sy-vline 
WA_CPSNODE_STR-PRODUCTSTRUCLASTCHANGEDBYUSER sy-vline 
WA_CPSNODE_STR-PRODUCTSTRUCLASTCHANGEDDATE sy-vline 
WA_CPSNODE_STR-PRODUCTSTRUCTURECREATEDBYUSER sy-vline 
WA_CPSNODE_STR-PRODUCTSTRUCTURECREATIONDATE sy-vline 
WA_CPSNODE_STR-PRODUCTSTRUCTURENODENAME sy-vline 
WA_CPSNODE_STR-PRODUCTSTRUCTURENODETYPE sy-vline 
WA_CPSNODE_STR-PRODSTRUCNODEDESCRIPTION sy-vline 
WA_CPSNODE_STR-PRODSTRUCNODETYPEDESCRIPTION sy-vline 
WA_CPSNODE_STR-PRODUCTSTRUCTUREGNRCOBJTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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