ABAP Select data from SAP table UMM_YS_CUST_VARTREE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UMM_YS_CUST_VARTREE
*  INTO TABLE @DATA(IT_UMM_YS_CUST_VARTREE2).
*--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_UMM_YS_CUST_VARTREE INDEX 1 INTO DATA(WA_UMM_YS_CUST_VARTREE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UMM_YS_CUST_VARTREE>-NODE_KEY = 1.
<UMM_YS_CUST_VARTREE>-TYPE = 1.
<UMM_YS_CUST_VARTREE>-RFCDEST = 1.
<UMM_YS_CUST_VARTREE>-ICUBE = 1.
<UMM_YS_CUST_VARTREE>-ICUBE_LTXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UMM_YS_CUST_VARTREE-ICHANM, sy-vline,
  WA_UMM_YS_CUST_VARTREE-ICHANM_LTXT, sy-vline,
  WA_UMM_YS_CUST_VARTREE-VANAME, sy-vline,
  WA_UMM_YS_CUST_VARTREE-VANAME_LTXT, sy-vline,
  WA_UMM_YS_CUST_VARTREE-WANO, sy-vline,
  WA_UMM_YS_CUST_VARTREE-LVNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UMM_YS_CUST_VARTREE 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_UMM_YS_CUST_VARTREE 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_UMM_YS_CUST_VARTREE INTO WA_UMM_YS_CUST_VARTREE.


*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_UMM_YS_CUST_VARTREE_STR, 
NODE_KEY TYPE STRING,
TYPE TYPE STRING,
RFCDEST TYPE STRING,
ICUBE TYPE STRING,
ICUBE_LTXT TYPE STRING,
ICHANM TYPE STRING,
ICHANM_LTXT TYPE STRING,
VANAME TYPE STRING,
VANAME_LTXT TYPE STRING,
WANO TYPE STRING,
LVNO TYPE STRING,
FRNO TYPE STRING,
POSFLG TYPE STRING,
TCUBE TYPE STRING,
TQUERY TYPE STRING,
TCHANM TYPE STRING,
FRNAME TYPE STRING,
FRNAME_LTXT TYPE STRING,
VARTYPE TYPE STRING,
SELTYPE TYPE STRING,
DISPLAY_VALUE TYPE STRING,
VARFILL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UMM_YS_CUST_VARTREE_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_UMM_YS_CUST_VARTREE_STR-NODE_KEY sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-TYPE sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-RFCDEST sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-ICUBE sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-ICUBE_LTXT sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-ICHANM sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-ICHANM_LTXT sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-VANAME sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-VANAME_LTXT sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-WANO sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-LVNO sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-FRNO sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-POSFLG sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-TCUBE sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-TQUERY sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-TCHANM sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-FRNAME sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-FRNAME_LTXT sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-VARTYPE sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-SELTYPE sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-DISPLAY_VALUE sy-vline 
WA_UMM_YS_CUST_VARTREE_STR-VARFILL sy-vline      INTO ld_text SEPARATED BY SPACE.

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