ABAP Select data from SAP table SCMON_VDATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SCMON_VDATA
*  INTO TABLE @DATA(IT_SCMON_VDATA2).
*--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_SCMON_VDATA INDEX 1 INTO DATA(WA_SCMON_VDATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SCMON_VDATA>-TRIGID = 1.
<SCMON_VDATA>-SUBID = 1.
<SCMON_VDATA>-SLICEID = 1.
<SCMON_VDATA>-SLICESTART = 1.
<SCMON_VDATA>-SLICEEND = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SCMON_VDATA-SLICEGROUPID, sy-vline,
  WA_SCMON_VDATA-ROOTTYPE, sy-vline,
  WA_SCMON_VDATA-ROOTNAME, sy-vline,
  WA_SCMON_VDATA-PROGNAME, sy-vline,
  WA_SCMON_VDATA-OBJECT, sy-vline,
  WA_SCMON_VDATA-OBJ_NAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SCMON_VDATA 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_SCMON_VDATA 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_SCMON_VDATA INTO WA_SCMON_VDATA.


*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_SCMON_VDATA_STR, 
TRIGID TYPE STRING,
SUBID TYPE STRING,
SLICEID TYPE STRING,
SLICESTART TYPE STRING,
SLICEEND TYPE STRING,
SLICEGROUPID TYPE STRING,
ROOTTYPE TYPE STRING,
ROOTNAME TYPE STRING,
PROGNAME TYPE STRING,
OBJECT TYPE STRING,
OBJ_NAME TYPE STRING,
PROCTYPE TYPE STRING,
PROCNAME TYPE STRING,
CLASSNAME TYPE STRING,
COUNTER TYPE STRING,
SUMMATION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SCMON_VDATA_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_SCMON_VDATA_STR-TRIGID sy-vline 
WA_SCMON_VDATA_STR-SUBID sy-vline 
WA_SCMON_VDATA_STR-SLICEID sy-vline 
WA_SCMON_VDATA_STR-SLICESTART sy-vline 
WA_SCMON_VDATA_STR-SLICEEND sy-vline 
WA_SCMON_VDATA_STR-SLICEGROUPID sy-vline 
WA_SCMON_VDATA_STR-ROOTTYPE sy-vline 
WA_SCMON_VDATA_STR-ROOTNAME sy-vline 
WA_SCMON_VDATA_STR-PROGNAME sy-vline 
WA_SCMON_VDATA_STR-OBJECT sy-vline 
WA_SCMON_VDATA_STR-OBJ_NAME sy-vline 
WA_SCMON_VDATA_STR-PROCTYPE sy-vline 
WA_SCMON_VDATA_STR-PROCNAME sy-vline 
WA_SCMON_VDATA_STR-CLASSNAME sy-vline 
WA_SCMON_VDATA_STR-COUNTER sy-vline 
WA_SCMON_VDATA_STR-SUMMATION sy-vline      INTO ld_text SEPARATED BY SPACE.

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