ABAP Select data from SAP table DMU_TREE into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP DMU_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 DMU_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 DMU_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_DMU_TREE TYPE STANDARD TABLE OF DMU_TREE,
      WA_DMU_TREE TYPE DMU_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: <DMU_TREE> TYPE DMU_TREE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DMU_TREE
*  INTO TABLE @DATA(IT_DMU_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_DMU_TREE INDEX 1 INTO DATA(WA_DMU_TREE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DMU_TREE>-TREE_ID = 1.
<DMU_TREE>-PARENT_LEVEL = 1.
<DMU_TREE>-ACTUAL_LEVEL = 1.
<DMU_TREE>-COMPRESS = 1.
<DMU_TREE>-END_OF_GROUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DMU_TREE-OBJECT_TYPE, sy-vline,
  WA_DMU_TREE-PRINT_TYPE, sy-vline,
  WA_DMU_TREE-NODE_TEXT, sy-vline,
  WA_DMU_TREE-EXTERNAL_SYSTEM, sy-vline,
  WA_DMU_TREE-HIGHLIGHT, sy-vline,
  WA_DMU_TREE-SELECTED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DMU_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_DMU_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_DMU_TREE INTO WA_DMU_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.

*Conversion exit MATN1, internal->external for field CAD_MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_DMU_TREE-CAD_MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DMU_TREE-CAD_MATNR.
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_DMU_TREE_STR, 
TREE_ID TYPE STRING,
PARENT_LEVEL TYPE STRING,
ACTUAL_LEVEL TYPE STRING,
COMPRESS TYPE STRING,
END_OF_GROUP TYPE STRING,
OBJECT_TYPE TYPE STRING,
PRINT_TYPE TYPE STRING,
NODE_TEXT TYPE STRING,
EXTERNAL_SYSTEM TYPE STRING,
HIGHLIGHT TYPE STRING,
SELECTED TYPE STRING,
INVISIBLE TYPE STRING,
EXCL_BY_FILTER TYPE STRING,
NOT_EXPANDABLE TYPE STRING,
EC_RELEVANT TYPE STRING,
RFCDEST TYPE STRING,
OBJECT_HANDLE TYPE STRING,
DOC_OBJ_TYPE TYPE STRING,
PLANT TYPE STRING,
BOMUSAGE TYPE STRING,
NODE_ID TYPE STRING,
LIST_LINE TYPE STRING,
FUNCTION_MODULE TYPE STRING,
CLS_OBJECT_TYPE TYPE STRING,
CLS_OBJECT_HANDLE TYPE STRING,
LVC_NODE_KEY TYPE STRING,
EXPANDED TYPE STRING,
OBJECT_NODE_ID TYPE STRING,
LC_PHASE TYPE STRING,
DOSTX TYPE STRING,
DKTXT TYPE STRING,
DOSAR TYPE STRING,
FRKNZ TYPE STRING,
ACTUAL_VERSION TYPE STRING,
CAD_MATNR TYPE STRING,
CAD_MAKTX TYPE STRING,
CAD_MATNR_X TYPE STRING,
CAD_SAPDB TYPE STRING,
CAD_STRUC TYPE STRING,
GUID_IDENT TYPE STRING,
GUID_PRED TYPE STRING,
LOCATION_IDENT TYPE STRING,
LOCATION_PRED TYPE STRING,
FLG_STKO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DMU_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_DMU_TREE_STR-TREE_ID sy-vline 
WA_DMU_TREE_STR-PARENT_LEVEL sy-vline 
WA_DMU_TREE_STR-ACTUAL_LEVEL sy-vline 
WA_DMU_TREE_STR-COMPRESS sy-vline 
WA_DMU_TREE_STR-END_OF_GROUP sy-vline 
WA_DMU_TREE_STR-OBJECT_TYPE sy-vline 
WA_DMU_TREE_STR-PRINT_TYPE sy-vline 
WA_DMU_TREE_STR-NODE_TEXT sy-vline 
WA_DMU_TREE_STR-EXTERNAL_SYSTEM sy-vline 
WA_DMU_TREE_STR-HIGHLIGHT sy-vline 
WA_DMU_TREE_STR-SELECTED sy-vline 
WA_DMU_TREE_STR-INVISIBLE sy-vline 
WA_DMU_TREE_STR-EXCL_BY_FILTER sy-vline 
WA_DMU_TREE_STR-NOT_EXPANDABLE sy-vline 
WA_DMU_TREE_STR-EC_RELEVANT sy-vline 
WA_DMU_TREE_STR-RFCDEST sy-vline 
WA_DMU_TREE_STR-OBJECT_HANDLE sy-vline 
WA_DMU_TREE_STR-DOC_OBJ_TYPE sy-vline 
WA_DMU_TREE_STR-PLANT sy-vline 
WA_DMU_TREE_STR-BOMUSAGE sy-vline 
WA_DMU_TREE_STR-NODE_ID sy-vline 
WA_DMU_TREE_STR-LIST_LINE sy-vline 
WA_DMU_TREE_STR-FUNCTION_MODULE sy-vline 
WA_DMU_TREE_STR-CLS_OBJECT_TYPE sy-vline 
WA_DMU_TREE_STR-CLS_OBJECT_HANDLE sy-vline 
WA_DMU_TREE_STR-LVC_NODE_KEY sy-vline 
WA_DMU_TREE_STR-EXPANDED sy-vline 
WA_DMU_TREE_STR-OBJECT_NODE_ID sy-vline 
WA_DMU_TREE_STR-LC_PHASE sy-vline 
WA_DMU_TREE_STR-DOSTX sy-vline 
WA_DMU_TREE_STR-DKTXT sy-vline 
WA_DMU_TREE_STR-DOSAR sy-vline 
WA_DMU_TREE_STR-FRKNZ sy-vline 
WA_DMU_TREE_STR-ACTUAL_VERSION sy-vline 
WA_DMU_TREE_STR-CAD_MATNR sy-vline 
WA_DMU_TREE_STR-CAD_MAKTX sy-vline 
WA_DMU_TREE_STR-CAD_MATNR_X sy-vline 
WA_DMU_TREE_STR-CAD_SAPDB sy-vline 
WA_DMU_TREE_STR-CAD_STRUC sy-vline 
WA_DMU_TREE_STR-GUID_IDENT sy-vline 
WA_DMU_TREE_STR-GUID_PRED sy-vline 
WA_DMU_TREE_STR-LOCATION_IDENT sy-vline 
WA_DMU_TREE_STR-LOCATION_PRED sy-vline 
WA_DMU_TREE_STR-FLG_STKO sy-vline      INTO ld_text SEPARATED BY SPACE.

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