ABAP Select data from SAP table TDS_DFLOW_TREE_WDNODE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDS_DFLOW_TREE_WDNODE
*  INTO TABLE @DATA(IT_TDS_DFLOW_TREE_WDNODE2).
*--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_TDS_DFLOW_TREE_WDNODE INDEX 1 INTO DATA(WA_TDS_DFLOW_TREE_WDNODE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDS_DFLOW_TREE_WDNODE>-ID = 1.
<TDS_DFLOW_TREE_WDNODE>-PARENT_ID = 1.
<TDS_DFLOW_TREE_WDNODE>-IS_LEAF = 1.
<TDS_DFLOW_TREE_WDNODE>-IS_EXPANDED = 1.
<TDS_DFLOW_TREE_WDNODE>-TEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDS_DFLOW_TREE_WDNODE-TEXT_FOCUS, sy-vline,
  WA_TDS_DFLOW_TREE_WDNODE-TEXT_TT, sy-vline,
  WA_TDS_DFLOW_TREE_WDNODE-URL, sy-vline,
  WA_TDS_DFLOW_TREE_WDNODE-URL_VIS, sy-vline,
  WA_TDS_DFLOW_TREE_WDNODE-HLEVEL, sy-vline,
  WA_TDS_DFLOW_TREE_WDNODE-FOCUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDS_DFLOW_TREE_WDNODE 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_TDS_DFLOW_TREE_WDNODE 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_TDS_DFLOW_TREE_WDNODE INTO WA_TDS_DFLOW_TREE_WDNODE.


*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.

*Conversion exit ALPHA, internal->external for field DOCNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TDS_DFLOW_TREE_WDNODE-DOCNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_DFLOW_TREE_WDNODE-DOCNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOCNUV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TDS_DFLOW_TREE_WDNODE-DOCNUV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_DFLOW_TREE_WDNODE-DOCNUV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_TDS_DFLOW_TREE_WDNODE-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_DFLOW_TREE_WDNODE-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_TDS_DFLOW_TREE_WDNODE-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_DFLOW_TREE_WDNODE-MEINS.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_TDS_DFLOW_TREE_WDNODE_STR, 
ID TYPE STRING,
PARENT_ID TYPE STRING,
IS_LEAF TYPE STRING,
IS_EXPANDED TYPE STRING,
TEXT TYPE STRING,
TEXT_FOCUS TYPE STRING,
TEXT_TT TYPE STRING,
URL TYPE STRING,
URL_VIS TYPE STRING,
HLEVEL TYPE STRING,
FOCUS TYPE STRING,
VBTYP TYPE STRING,
DESCRIPTION TYPE STRING,
DOCNUM TYPE STRING,
DOCNUV TYPE STRING,
ITEMNUM TYPE STRING,
ITEMNUV TYPE STRING,
VBTYP_N TYPE STRING,
VBTYP_V TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
STATUS TYPE STRING,
MATNR TYPE STRING,
RFMNG TYPE STRING,
MEINS TYPE STRING,
RFWRT TYPE STRING,
WAERS TYPE STRING,
PLMIN TYPE STRING,
LGNUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDS_DFLOW_TREE_WDNODE_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_TDS_DFLOW_TREE_WDNODE_STR-ID sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-PARENT_ID sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-IS_LEAF sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-IS_EXPANDED sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-TEXT sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-TEXT_FOCUS sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-TEXT_TT sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-URL sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-URL_VIS sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-HLEVEL sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-FOCUS sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-VBTYP sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-DESCRIPTION sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-DOCNUM sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-DOCNUV sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-ITEMNUM sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-ITEMNUV sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-VBTYP_N sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-VBTYP_V sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-ERDAT sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-ERZET sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-STATUS sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-MATNR sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-RFMNG sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-MEINS sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-RFWRT sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-WAERS sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-PLMIN sy-vline 
WA_TDS_DFLOW_TREE_WDNODE_STR-LGNUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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