ABAP Select data from SAP table PSKFGRPNODE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSKFGRPNODE
*  INTO TABLE @DATA(IT_PSKFGRPNODE2).
*--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_PSKFGRPNODE INDEX 1 INTO DATA(WA_PSKFGRPNODE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSKFGRPNODE>-MANDT = 1.
<PSKFGRPNODE>-SETCLASS = 1.
<PSKFGRPNODE>-SETSUBCLASS = 1.
<PSKFGRPNODE>-SETID = 1.
<PSKFGRPNODE>-SETLINENUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSKFGRPNODE-CHILDSETCLASS, sy-vline,
  WA_PSKFGRPNODE-CHILDSETSUBCLASS, sy-vline,
  WA_PSKFGRPNODE-CHILDSETID, sy-vline,
  WA_PSKFGRPNODE-ISROOT, sy-vline,
  WA_PSKFGRPNODE-ISLEAF, sy-vline,
  WA_PSKFGRPNODE-SETRANGEFROMVALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSKFGRPNODE 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_PSKFGRPNODE 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_PSKFGRPNODE INTO WA_PSKFGRPNODE.


*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_PSKFGRPNODE_STR, 
MANDT TYPE STRING,
SETCLASS TYPE STRING,
SETSUBCLASS TYPE STRING,
SETID TYPE STRING,
SETLINENUMBER TYPE STRING,
CHILDSETCLASS TYPE STRING,
CHILDSETSUBCLASS TYPE STRING,
CHILDSETID TYPE STRING,
ISROOT TYPE STRING,
ISLEAF TYPE STRING,
SETRANGEFROMVALUE TYPE STRING,
SETRANGETOVALUE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSKFGRPNODE_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_PSKFGRPNODE_STR-MANDT sy-vline 
WA_PSKFGRPNODE_STR-SETCLASS sy-vline 
WA_PSKFGRPNODE_STR-SETSUBCLASS sy-vline 
WA_PSKFGRPNODE_STR-SETID sy-vline 
WA_PSKFGRPNODE_STR-SETLINENUMBER sy-vline 
WA_PSKFGRPNODE_STR-CHILDSETCLASS sy-vline 
WA_PSKFGRPNODE_STR-CHILDSETSUBCLASS sy-vline 
WA_PSKFGRPNODE_STR-CHILDSETID sy-vline 
WA_PSKFGRPNODE_STR-ISROOT sy-vline 
WA_PSKFGRPNODE_STR-ISLEAF sy-vline 
WA_PSKFGRPNODE_STR-SETRANGEFROMVALUE sy-vline 
WA_PSKFGRPNODE_STR-SETRANGETOVALUE sy-vline      INTO ld_text SEPARATED BY SPACE.

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