ABAP Select data from SAP table CTS_WD_TABLETREE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CTS_WD_TABLETREE
*  INTO TABLE @DATA(IT_CTS_WD_TABLETREE2).
*--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_CTS_WD_TABLETREE INDEX 1 INTO DATA(WA_CTS_WD_TABLETREE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CTS_WD_TABLETREE>-ROWKEY = 1.
<CTS_WD_TABLETREE>-PARENT_ROW_KEY = 1.
<CTS_WD_TABLETREE>-TREE_COLUMN_TEXT = 1.
<CTS_WD_TABLETREE>-TREE_COLUMN_SYMBOL = 1.
<CTS_WD_TABLETREE>-TREE_COLUMN_TOOLTIP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CTS_WD_TABLETREE-TRKORR, sy-vline,
  WA_CTS_WD_TABLETREE-OWNER, sy-vline,
  WA_CTS_WD_TABLETREE-DESCRIPTION, sy-vline,
  WA_CTS_WD_TABLETREE-DESCRIPTION_IMAGE, sy-vline,
  WA_CTS_WD_TABLETREE-LAST_CHANGE_DATE, sy-vline,
  WA_CTS_WD_TABLETREE-LAST_CHANGE_TIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CTS_WD_TABLETREE 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_CTS_WD_TABLETREE 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_CTS_WD_TABLETREE INTO WA_CTS_WD_TABLETREE.


*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_CTS_WD_TABLETREE_STR, 
ROWKEY TYPE STRING,
PARENT_ROW_KEY TYPE STRING,
TREE_COLUMN_TEXT TYPE STRING,
TREE_COLUMN_SYMBOL TYPE STRING,
TREE_COLUMN_TOOLTIP TYPE STRING,
TRKORR TYPE STRING,
OWNER TYPE STRING,
DESCRIPTION TYPE STRING,
DESCRIPTION_IMAGE TYPE STRING,
LAST_CHANGE_DATE TYPE STRING,
LAST_CHANGE_TIME TYPE STRING,
DATE_AND_TIME TYPE STRING,
OBJECT_LIST TYPE STRING,
OBJECT_LIST_VISIBLE TYPE STRING,
OBJECT_STATUS TYPE STRING,
OBJECT_STATUS_VISIBLE TYPE STRING,
RELEASE_FLAG TYPE STRING,
RELEASE_VISIBLE TYPE STRING,
FILE_CONTENT TYPE STRING,
FILE_CONTENT_VISIBLE TYPE STRING,
IMPORT_BUTTON_FCODE TYPE STRING,
TRFUNCTION TYPE STRING,
EXPANDED TYPE STRING,
IS_LEAF TYPE STRING,
CLIENT TYPE STRING,
TARCLIENT TYPE STRING,
CLIENTS_FILLED TYPE STRING,
TARDEVCL TYPE STRING,
DEVCLASS TYPE STRING,
TARSYSTEM TYPE STRING,
STATUS_TEXT TYPE STRING,
PROJECT TYPE STRING,
IS_STANDARD_REQUEST TYPE STRING,
COLOR_OF_CELL TYPE STRING,
PROTOKOL_VISIBLE TYPE STRING,
PROTOKOL_ENABLED TYPE STRING,
STANDARD_RQ_ENABLED TYPE STRING,
DELETE_RQ_ENABLED TYPE STRING,
RELEASE_ENABLED TYPE STRING,
PROPERTY_READONLY TYPE STRING,
PROJECT_EXTERNALID TYPE STRING,
STRKORR TYPE STRING,
POPIN TYPE STRING,
CELL_VARIANT TYPE STRING,
EMPTY_CELL_VARIANT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CTS_WD_TABLETREE_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_CTS_WD_TABLETREE_STR-ROWKEY sy-vline 
WA_CTS_WD_TABLETREE_STR-PARENT_ROW_KEY sy-vline 
WA_CTS_WD_TABLETREE_STR-TREE_COLUMN_TEXT sy-vline 
WA_CTS_WD_TABLETREE_STR-TREE_COLUMN_SYMBOL sy-vline 
WA_CTS_WD_TABLETREE_STR-TREE_COLUMN_TOOLTIP sy-vline 
WA_CTS_WD_TABLETREE_STR-TRKORR sy-vline 
WA_CTS_WD_TABLETREE_STR-OWNER sy-vline 
WA_CTS_WD_TABLETREE_STR-DESCRIPTION sy-vline 
WA_CTS_WD_TABLETREE_STR-DESCRIPTION_IMAGE sy-vline 
WA_CTS_WD_TABLETREE_STR-LAST_CHANGE_DATE sy-vline 
WA_CTS_WD_TABLETREE_STR-LAST_CHANGE_TIME sy-vline 
WA_CTS_WD_TABLETREE_STR-DATE_AND_TIME sy-vline 
WA_CTS_WD_TABLETREE_STR-OBJECT_LIST sy-vline 
WA_CTS_WD_TABLETREE_STR-OBJECT_LIST_VISIBLE sy-vline 
WA_CTS_WD_TABLETREE_STR-OBJECT_STATUS sy-vline 
WA_CTS_WD_TABLETREE_STR-OBJECT_STATUS_VISIBLE sy-vline 
WA_CTS_WD_TABLETREE_STR-RELEASE_FLAG sy-vline 
WA_CTS_WD_TABLETREE_STR-RELEASE_VISIBLE sy-vline 
WA_CTS_WD_TABLETREE_STR-FILE_CONTENT sy-vline 
WA_CTS_WD_TABLETREE_STR-FILE_CONTENT_VISIBLE sy-vline 
WA_CTS_WD_TABLETREE_STR-IMPORT_BUTTON_FCODE sy-vline 
WA_CTS_WD_TABLETREE_STR-TRFUNCTION sy-vline 
WA_CTS_WD_TABLETREE_STR-EXPANDED sy-vline 
WA_CTS_WD_TABLETREE_STR-IS_LEAF sy-vline 
WA_CTS_WD_TABLETREE_STR-CLIENT sy-vline 
WA_CTS_WD_TABLETREE_STR-TARCLIENT sy-vline 
WA_CTS_WD_TABLETREE_STR-CLIENTS_FILLED sy-vline 
WA_CTS_WD_TABLETREE_STR-TARDEVCL sy-vline 
WA_CTS_WD_TABLETREE_STR-DEVCLASS sy-vline 
WA_CTS_WD_TABLETREE_STR-TARSYSTEM sy-vline 
WA_CTS_WD_TABLETREE_STR-STATUS_TEXT sy-vline 
WA_CTS_WD_TABLETREE_STR-PROJECT sy-vline 
WA_CTS_WD_TABLETREE_STR-IS_STANDARD_REQUEST sy-vline 
WA_CTS_WD_TABLETREE_STR-COLOR_OF_CELL sy-vline 
WA_CTS_WD_TABLETREE_STR-PROTOKOL_VISIBLE sy-vline 
WA_CTS_WD_TABLETREE_STR-PROTOKOL_ENABLED sy-vline 
WA_CTS_WD_TABLETREE_STR-STANDARD_RQ_ENABLED sy-vline 
WA_CTS_WD_TABLETREE_STR-DELETE_RQ_ENABLED sy-vline 
WA_CTS_WD_TABLETREE_STR-RELEASE_ENABLED sy-vline 
WA_CTS_WD_TABLETREE_STR-PROPERTY_READONLY sy-vline 
WA_CTS_WD_TABLETREE_STR-PROJECT_EXTERNALID sy-vline 
WA_CTS_WD_TABLETREE_STR-STRKORR sy-vline 
WA_CTS_WD_TABLETREE_STR-POPIN sy-vline 
WA_CTS_WD_TABLETREE_STR-CELL_VARIANT sy-vline 
WA_CTS_WD_TABLETREE_STR-EMPTY_CELL_VARIANT sy-vline      INTO ld_text SEPARATED BY SPACE.

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