ABAP Select data from SAP table DMECD_TREE_CALC 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 DMECD_TREE_CALC 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 DMECD_TREE_CALC. 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 DMECD_TREE_CALC 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_DMECD_TREE_CALC TYPE STANDARD TABLE OF DMECD_TREE_CALC,
      WA_DMECD_TREE_CALC TYPE DMECD_TREE_CALC,
      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: <DMECD_TREE_CALC> TYPE DMECD_TREE_CALC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DMECD_TREE_CALC
*  INTO TABLE @DATA(IT_DMECD_TREE_CALC2).
*--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_DMECD_TREE_CALC INDEX 1 INTO DATA(WA_DMECD_TREE_CALC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DMECD_TREE_CALC>-MANDT = 1.
<DMECD_TREE_CALC>-DRAFTUUID = 1.
<DMECD_TREE_CALC>-PARENTDRAFTUUID = 1.
<DMECD_TREE_CALC>-ROOTDRAFTUUID = 1.
<DMECD_TREE_CALC>-HIERARCHYTREETYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DMECD_TREE_CALC-HIERARCHYTREE, sy-vline,
  WA_DMECD_TREE_CALC-HIERARCHYTREEVERSION, sy-vline,
  WA_DMECD_TREE_CALC-HIERARCHYNODE, sy-vline,
  WA_DMECD_TREE_CALC-SORTSEQUENCE, sy-vline,
  WA_DMECD_TREE_CALC-HIERARCHYTREEVARIABLENAME, sy-vline,
  WA_DMECD_TREE_CALC-HIERARCHYTREEARITHMETICOPTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DMECD_TREE_CALC 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_DMECD_TREE_CALC 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_DMECD_TREE_CALC INTO WA_DMECD_TREE_CALC.


*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_DMECD_TREE_CALC_STR, 
MANDT TYPE STRING,
DRAFTUUID TYPE STRING,
PARENTDRAFTUUID TYPE STRING,
ROOTDRAFTUUID TYPE STRING,
HIERARCHYTREETYPE TYPE STRING,
HIERARCHYTREE TYPE STRING,
HIERARCHYTREEVERSION TYPE STRING,
HIERARCHYNODE TYPE STRING,
SORTSEQUENCE TYPE STRING,
HIERARCHYTREEVARIABLENAME TYPE STRING,
HIERARCHYTREEARITHMETICOPTR TYPE STRING,
LEFTOPERANDVALUE TYPE STRING,
LEFTOPERANDTYPE TYPE STRING,
LEFTOPERANDNODECONTENTTYPE TYPE STRING,
RIGHTOPERANDVALUE TYPE STRING,
RIGHTOPERANDTYPE TYPE STRING,
RIGHTOPERANDNODECONTENTTYPE TYPE STRING,
HIERARCHYTREEARITHMETICOPTRTXT TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYCONSISTENCYSTATUS TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DMECD_TREE_CALC_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_DMECD_TREE_CALC_STR-MANDT sy-vline 
WA_DMECD_TREE_CALC_STR-DRAFTUUID sy-vline 
WA_DMECD_TREE_CALC_STR-PARENTDRAFTUUID sy-vline 
WA_DMECD_TREE_CALC_STR-ROOTDRAFTUUID sy-vline 
WA_DMECD_TREE_CALC_STR-HIERARCHYTREETYPE sy-vline 
WA_DMECD_TREE_CALC_STR-HIERARCHYTREE sy-vline 
WA_DMECD_TREE_CALC_STR-HIERARCHYTREEVERSION sy-vline 
WA_DMECD_TREE_CALC_STR-HIERARCHYNODE sy-vline 
WA_DMECD_TREE_CALC_STR-SORTSEQUENCE sy-vline 
WA_DMECD_TREE_CALC_STR-HIERARCHYTREEVARIABLENAME sy-vline 
WA_DMECD_TREE_CALC_STR-HIERARCHYTREEARITHMETICOPTR sy-vline 
WA_DMECD_TREE_CALC_STR-LEFTOPERANDVALUE sy-vline 
WA_DMECD_TREE_CALC_STR-LEFTOPERANDTYPE sy-vline 
WA_DMECD_TREE_CALC_STR-LEFTOPERANDNODECONTENTTYPE sy-vline 
WA_DMECD_TREE_CALC_STR-RIGHTOPERANDVALUE sy-vline 
WA_DMECD_TREE_CALC_STR-RIGHTOPERANDTYPE sy-vline 
WA_DMECD_TREE_CALC_STR-RIGHTOPERANDNODECONTENTTYPE sy-vline 
WA_DMECD_TREE_CALC_STR-HIERARCHYTREEARITHMETICOPTRTXT sy-vline 
WA_DMECD_TREE_CALC_STR-HASACTIVEENTITY sy-vline 
WA_DMECD_TREE_CALC_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_DMECD_TREE_CALC_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_DMECD_TREE_CALC_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_DMECD_TREE_CALC_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_DMECD_TREE_CALC_STR-DRAFTENTITYOPERATIONCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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