ABAP Select data from SAP table /SAPAPO/TREE_OBJ_NODE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/TREE_OBJ_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 /SAPAPO/TREE_OBJ_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 /SAPAPO/TREE_OBJ_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_/SAPAPO/TREE_OBJ_NODE TYPE STANDARD TABLE OF /SAPAPO/TREE_OBJ_NODE,
      WA_/SAPAPO/TREE_OBJ_NODE TYPE /SAPAPO/TREE_OBJ_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: </SAPAPO/TREE_OBJ_NODE> TYPE /SAPAPO/TREE_OBJ_NODE.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/TREE_OBJ_NODE
  INTO TABLE IT_/SAPAPO/TREE_OBJ_NODE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/TREE_OBJ_NODE
*  INTO TABLE @DATA(IT_/SAPAPO/TREE_OBJ_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_/SAPAPO/TREE_OBJ_NODE INDEX 1 INTO DATA(WA_/SAPAPO/TREE_OBJ_NODE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/TREE_OBJ_NODE ASSIGNING </SAPAPO/TREE_OBJ_NODE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/TREE_OBJ_NODE>-NODE_KEY = 1.
</SAPAPO/TREE_OBJ_NODE>-TYPE = 1.
</SAPAPO/TREE_OBJ_NODE>-STYLE = 1.
</SAPAPO/TREE_OBJ_NODE>-KEY1 = 1.
</SAPAPO/TREE_OBJ_NODE>-KEY2 = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/TREE_OBJ_NODE INTO WA_/SAPAPO/TREE_OBJ_NODE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/TREE_OBJ_NODE-KEY3, sy-vline,
  WA_/SAPAPO/TREE_OBJ_NODE-KEY4, sy-vline,
  WA_/SAPAPO/TREE_OBJ_NODE-KEY5, sy-vline,
  WA_/SAPAPO/TREE_OBJ_NODE-PARENTKEY, sy-vline,
  WA_/SAPAPO/TREE_OBJ_NODE-RELATKEY, sy-vline,
  WA_/SAPAPO/TREE_OBJ_NODE-RELATSHIP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/TREE_OBJ_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_/SAPAPO/TREE_OBJ_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_/SAPAPO/TREE_OBJ_NODE INTO WA_/SAPAPO/TREE_OBJ_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_/SAPAPO/TREE_OBJ_NODE_STR, 
NODE_KEY TYPE STRING,
TYPE TYPE STRING,
STYLE TYPE STRING,
KEY1 TYPE STRING,
KEY2 TYPE STRING,
KEY3 TYPE STRING,
KEY4 TYPE STRING,
KEY5 TYPE STRING,
PARENTKEY TYPE STRING,
RELATKEY TYPE STRING,
RELATSHIP TYPE STRING,
EXPANDER TYPE STRING,
ICON TYPE STRING,
SORT_VALUE TYPE STRING,
ITEM_SORT_VALUE TYPE STRING,
ITEM_SORT_TEXT TYPE STRING,
ITEM1_VALUE TYPE STRING,
ITEM1_IMAGE TYPE STRING,
ITEM1_SORT_VALUE TYPE STRING,
ITEM2_VALUE TYPE STRING,
ITEM2_IMAGE TYPE STRING,
ITEM2_SORT_VALUE TYPE STRING,
ITEM3_VALUE TYPE STRING,
ITEM3_IMAGE TYPE STRING,
ITEM3_SORT_VALUE TYPE STRING,
ITEM4_VALUE TYPE STRING,
ITEM4_IMAGE TYPE STRING,
ITEM4_SORT_VALUE TYPE STRING,
ITEM5_VALUE TYPE STRING,
ITEM5_IMAGE TYPE STRING,
ITEM5_SORT_VALUE TYPE STRING,
ITEM6_VALUE TYPE STRING,
ITEM6_IMAGE TYPE STRING,
ITEM6_SORT_VALUE TYPE STRING,
ITEM7_VALUE TYPE STRING,
ITEM7_IMAGE TYPE STRING,
ITEM7_SORT_VALUE TYPE STRING,
ITEM8_VALUE TYPE STRING,
ITEM8_IMAGE TYPE STRING,
ITEM8_SORT_VALUE TYPE STRING,
ITEM9_VALUE TYPE STRING,
ITEM9_IMAGE TYPE STRING,
ITEM9_SORT_VALUE TYPE STRING,
ITEM10_VALUE TYPE STRING,
ITEM10_IMAGE TYPE STRING,
ITEM10_SORT_VALUE TYPE STRING,
ITEM11_VALUE TYPE STRING,
ITEM11_IMAGE TYPE STRING,
ITEM11_SORT_VALUE TYPE STRING,
ITEM12_VALUE TYPE STRING,
ITEM12_IMAGE TYPE STRING,
ITEM12_SORT_VALUE TYPE STRING,
ITEM13_VALUE TYPE STRING,
ITEM13_IMAGE TYPE STRING,
ITEM13_SORT_VALUE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/TREE_OBJ_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_/SAPAPO/TREE_OBJ_NODE_STR-NODE_KEY sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-TYPE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-STYLE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-KEY1 sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-KEY2 sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-KEY3 sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-KEY4 sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-KEY5 sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-PARENTKEY sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-RELATKEY sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-RELATSHIP sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-EXPANDER sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ICON sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-SORT_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM_SORT_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM_SORT_TEXT sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM1_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM1_IMAGE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM1_SORT_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM2_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM2_IMAGE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM2_SORT_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM3_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM3_IMAGE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM3_SORT_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM4_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM4_IMAGE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM4_SORT_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM5_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM5_IMAGE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM5_SORT_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM6_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM6_IMAGE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM6_SORT_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM7_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM7_IMAGE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM7_SORT_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM8_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM8_IMAGE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM8_SORT_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM9_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM9_IMAGE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM9_SORT_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM10_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM10_IMAGE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM10_SORT_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM11_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM11_IMAGE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM11_SORT_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM12_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM12_IMAGE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM12_SORT_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM13_VALUE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM13_IMAGE sy-vline 
WA_/SAPAPO/TREE_OBJ_NODE_STR-ITEM13_SORT_VALUE sy-vline      INTO ld_text SEPARATED BY SPACE.

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