ABAP Select data from SAP table WDY_APPLMOD_NODE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WDY_APPLMOD_NODE
*  INTO TABLE @DATA(IT_WDY_APPLMOD_NODE2).
*--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_WDY_APPLMOD_NODE INDEX 1 INTO DATA(WA_WDY_APPLMOD_NODE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WDY_APPLMOD_NODE>-TREE_NODEKEY = 1.
<WDY_APPLMOD_NODE>-TREE_RELATKEY = 1.
<WDY_APPLMOD_NODE>-TREE_CHILDKEY = 1.
<WDY_APPLMOD_NODE>-REF_API_OBJECT1 = 1.
<WDY_APPLMOD_NODE>-REF_API_OBJECT2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WDY_APPLMOD_NODE-REF_API_OBJECT3, sy-vline,
  WA_WDY_APPLMOD_NODE-REF_API_OBJECT4, sy-vline,
  WA_WDY_APPLMOD_NODE-NODE_NAME, sy-vline,
  WA_WDY_APPLMOD_NODE-RELAT1_NAME, sy-vline,
  WA_WDY_APPLMOD_NODE-RELAT2_NAME, sy-vline,
  WA_WDY_APPLMOD_NODE-VERSION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WDY_APPLMOD_NODE 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_WDY_APPLMOD_NODE 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_WDY_APPLMOD_NODE INTO WA_WDY_APPLMOD_NODE.


*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_WDY_APPLMOD_NODE_STR, 
TREE_NODEKEY TYPE STRING,
TREE_RELATKEY TYPE STRING,
TREE_CHILDKEY TYPE STRING,
REF_API_OBJECT1 TYPE STRING,
REF_API_OBJECT2 TYPE STRING,
REF_API_OBJECT3 TYPE STRING,
REF_API_OBJECT4 TYPE STRING,
NODE_NAME TYPE STRING,
RELAT1_NAME TYPE STRING,
RELAT2_NAME TYPE STRING,
VERSION TYPE STRING,
NODE_TYPE TYPE STRING,
PARENT_NODE_NAME TYPE STRING,
NODE_POSITION TYPE STRING,
MDL_NAME TYPE STRING,
DISPLAY_NAME TYPE STRING,
READ_ONLY TYPE STRING,
VISUALIZED TYPE STRING,
CHARACTERISTIC TYPE STRING,
DESCRIPTION TYPE STRING,
POSITION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WDY_APPLMOD_NODE_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_WDY_APPLMOD_NODE_STR-TREE_NODEKEY sy-vline 
WA_WDY_APPLMOD_NODE_STR-TREE_RELATKEY sy-vline 
WA_WDY_APPLMOD_NODE_STR-TREE_CHILDKEY sy-vline 
WA_WDY_APPLMOD_NODE_STR-REF_API_OBJECT1 sy-vline 
WA_WDY_APPLMOD_NODE_STR-REF_API_OBJECT2 sy-vline 
WA_WDY_APPLMOD_NODE_STR-REF_API_OBJECT3 sy-vline 
WA_WDY_APPLMOD_NODE_STR-REF_API_OBJECT4 sy-vline 
WA_WDY_APPLMOD_NODE_STR-NODE_NAME sy-vline 
WA_WDY_APPLMOD_NODE_STR-RELAT1_NAME sy-vline 
WA_WDY_APPLMOD_NODE_STR-RELAT2_NAME sy-vline 
WA_WDY_APPLMOD_NODE_STR-VERSION sy-vline 
WA_WDY_APPLMOD_NODE_STR-NODE_TYPE sy-vline 
WA_WDY_APPLMOD_NODE_STR-PARENT_NODE_NAME sy-vline 
WA_WDY_APPLMOD_NODE_STR-NODE_POSITION sy-vline 
WA_WDY_APPLMOD_NODE_STR-MDL_NAME sy-vline 
WA_WDY_APPLMOD_NODE_STR-DISPLAY_NAME sy-vline 
WA_WDY_APPLMOD_NODE_STR-READ_ONLY sy-vline 
WA_WDY_APPLMOD_NODE_STR-VISUALIZED sy-vline 
WA_WDY_APPLMOD_NODE_STR-CHARACTERISTIC sy-vline 
WA_WDY_APPLMOD_NODE_STR-DESCRIPTION sy-vline 
WA_WDY_APPLMOD_NODE_STR-POSITION sy-vline      INTO ld_text SEPARATED BY SPACE.

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