ABAP Select data from SAP table ISH_SERVICE_VIEW_TREE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISH_SERVICE_VIEW_TREE
*  INTO TABLE @DATA(IT_ISH_SERVICE_VIEW_TREE2).
*--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_ISH_SERVICE_VIEW_TREE INDEX 1 INTO DATA(WA_ISH_SERVICE_VIEW_TREE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISH_SERVICE_VIEW_TREE>-NODE_KEY = 1.
<ISH_SERVICE_VIEW_TREE>-RELATKEY = 1.
<ISH_SERVICE_VIEW_TREE>-RELATSHIP = 1.
<ISH_SERVICE_VIEW_TREE>-HIDDEN = 1.
<ISH_SERVICE_VIEW_TREE>-DISABLED = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISH_SERVICE_VIEW_TREE-ISFOLDER, sy-vline,
  WA_ISH_SERVICE_VIEW_TREE-N_IMAGE, sy-vline,
  WA_ISH_SERVICE_VIEW_TREE-EXP_IMAGE, sy-vline,
  WA_ISH_SERVICE_VIEW_TREE-STYLE, sy-vline,
  WA_ISH_SERVICE_VIEW_TREE-LAST_HITEM, sy-vline,
  WA_ISH_SERVICE_VIEW_TREE-NO_BRANCH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISH_SERVICE_VIEW_TREE 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_ISH_SERVICE_VIEW_TREE 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_ISH_SERVICE_VIEW_TREE INTO WA_ISH_SERVICE_VIEW_TREE.


*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_ISH_SERVICE_VIEW_TREE_STR, 
NODE_KEY TYPE STRING,
RELATKEY TYPE STRING,
RELATSHIP TYPE STRING,
HIDDEN TYPE STRING,
DISABLED TYPE STRING,
ISFOLDER TYPE STRING,
N_IMAGE TYPE STRING,
EXP_IMAGE TYPE STRING,
STYLE TYPE STRING,
LAST_HITEM TYPE STRING,
NO_BRANCH TYPE STRING,
EXPANDER TYPE STRING,
DRAGDROPID TYPE STRING,
TEXT TYPE STRING,
VIEWTYPE TYPE STRING,
VIEWID TYPE STRING,
DISPLAY TYPE STRING,
SAPVIEW TYPE STRING,
OWNER TYPE STRING,
TABNAME TYPE STRING,
FIELD1 TYPE STRING,
VALUE1 TYPE STRING,
FIELD2 TYPE STRING,
VALUE2 TYPE STRING,
FORM_NAME TYPE STRING,
FORM_BELNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISH_SERVICE_VIEW_TREE_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_ISH_SERVICE_VIEW_TREE_STR-NODE_KEY sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-RELATKEY sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-RELATSHIP sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-HIDDEN sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-DISABLED sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-ISFOLDER sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-N_IMAGE sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-EXP_IMAGE sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-STYLE sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-LAST_HITEM sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-NO_BRANCH sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-EXPANDER sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-DRAGDROPID sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-TEXT sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-VIEWTYPE sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-VIEWID sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-DISPLAY sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-SAPVIEW sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-OWNER sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-TABNAME sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-FIELD1 sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-VALUE1 sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-FIELD2 sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-VALUE2 sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-FORM_NAME sy-vline 
WA_ISH_SERVICE_VIEW_TREE_STR-FORM_BELNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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