ABAP Select data from SAP table /BOBF/S_DAC_NODE 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 /BOBF/S_DAC_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 /BOBF/S_DAC_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 /BOBF/S_DAC_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_/BOBF/S_DAC_NODE TYPE STANDARD TABLE OF /BOBF/S_DAC_NODE,
      WA_/BOBF/S_DAC_NODE TYPE /BOBF/S_DAC_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: </BOBF/S_DAC_NODE> TYPE /BOBF/S_DAC_NODE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /BOBF/S_DAC_NODE
*  INTO TABLE @DATA(IT_/BOBF/S_DAC_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_/BOBF/S_DAC_NODE INDEX 1 INTO DATA(WA_/BOBF/S_DAC_NODE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</BOBF/S_DAC_NODE>-NODE_KEY = 1.
</BOBF/S_DAC_NODE>-PARENT_NODE_KEY = 1.
</BOBF/S_DAC_NODE>-LOADABLE = 1.
</BOBF/S_DAC_NODE>-DEFAULT_NODE_CAT_KEY = 1.
</BOBF/S_DAC_NODE>-LEAD_DB_NODE_KEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/BOBF/S_DAC_NODE-LEAD_BUF_NODE_KEY, sy-vline,
  WA_/BOBF/S_DAC_NODE-DATA_TYPE, sy-vline,
  WA_/BOBF/S_DAC_NODE-DATA_DATA_TYPE, sy-vline,
  WA_/BOBF/S_DAC_NODE-DATA_TABLE_TYPE, sy-vline,
  WA_/BOBF/S_DAC_NODE-DATABASE_TABLE, sy-vline,
  WA_/BOBF/S_DAC_NODE-DATABASE_VIEW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/BOBF/S_DAC_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_/BOBF/S_DAC_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_/BOBF/S_DAC_NODE INTO WA_/BOBF/S_DAC_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_/BOBF/S_DAC_NODE_STR, 
NODE_KEY TYPE STRING,
PARENT_NODE_KEY TYPE STRING,
LOADABLE TYPE STRING,
DEFAULT_NODE_CAT_KEY TYPE STRING,
LEAD_DB_NODE_KEY TYPE STRING,
LEAD_BUF_NODE_KEY TYPE STRING,
DATA_TYPE TYPE STRING,
DATA_DATA_TYPE TYPE STRING,
DATA_TABLE_TYPE TYPE STRING,
DATABASE_TABLE TYPE STRING,
DATABASE_VIEW TYPE STRING,
IS_CDS_VIEW TYPE STRING,
GROUP_NAME TYPE STRING,
NODE_NAME TYPE STRING,
DEPENDENT_DB_NODE_KEYS TYPE STRING,
NODE_KEY_ON_DB TYPE STRING,
NODE_KEY_NAME TYPE STRING,
KEY_NAME TYPE STRING,
PARENT_KEY_NAME TYPE STRING,
ROOT_KEY_NAME TYPE STRING,
NODE_CAT_KEY_NAME TYPE STRING,
WHERE_SUPPLEMENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/BOBF/S_DAC_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_/BOBF/S_DAC_NODE_STR-NODE_KEY sy-vline 
WA_/BOBF/S_DAC_NODE_STR-PARENT_NODE_KEY sy-vline 
WA_/BOBF/S_DAC_NODE_STR-LOADABLE sy-vline 
WA_/BOBF/S_DAC_NODE_STR-DEFAULT_NODE_CAT_KEY sy-vline 
WA_/BOBF/S_DAC_NODE_STR-LEAD_DB_NODE_KEY sy-vline 
WA_/BOBF/S_DAC_NODE_STR-LEAD_BUF_NODE_KEY sy-vline 
WA_/BOBF/S_DAC_NODE_STR-DATA_TYPE sy-vline 
WA_/BOBF/S_DAC_NODE_STR-DATA_DATA_TYPE sy-vline 
WA_/BOBF/S_DAC_NODE_STR-DATA_TABLE_TYPE sy-vline 
WA_/BOBF/S_DAC_NODE_STR-DATABASE_TABLE sy-vline 
WA_/BOBF/S_DAC_NODE_STR-DATABASE_VIEW sy-vline 
WA_/BOBF/S_DAC_NODE_STR-IS_CDS_VIEW sy-vline 
WA_/BOBF/S_DAC_NODE_STR-GROUP_NAME sy-vline 
WA_/BOBF/S_DAC_NODE_STR-NODE_NAME sy-vline 
WA_/BOBF/S_DAC_NODE_STR-DEPENDENT_DB_NODE_KEYS sy-vline 
WA_/BOBF/S_DAC_NODE_STR-NODE_KEY_ON_DB sy-vline 
WA_/BOBF/S_DAC_NODE_STR-NODE_KEY_NAME sy-vline 
WA_/BOBF/S_DAC_NODE_STR-KEY_NAME sy-vline 
WA_/BOBF/S_DAC_NODE_STR-PARENT_KEY_NAME sy-vline 
WA_/BOBF/S_DAC_NODE_STR-ROOT_KEY_NAME sy-vline 
WA_/BOBF/S_DAC_NODE_STR-NODE_CAT_KEY_NAME sy-vline 
WA_/BOBF/S_DAC_NODE_STR-WHERE_SUPPLEMENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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