ABAP Select data from SAP table DRVN_MON_FIELDVAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DRVN_MON_FIELDVAL
*  INTO TABLE @DATA(IT_DRVN_MON_FIELDVAL2).
*--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_DRVN_MON_FIELDVAL INDEX 1 INTO DATA(WA_DRVN_MON_FIELDVAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DRVN_MON_FIELDVAL>-DRVNO = 1.
<DRVN_MON_FIELDVAL>-DRVFL_ICON = 1.
<DRVN_MON_FIELDVAL>-DRVFL = 1.
<DRVN_MON_FIELDVAL>-ATWTB = 1.
<DRVN_MON_FIELDVAL>-DRVCF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DRVN_MON_FIELDVAL-DRVCHAR, sy-vline,
  WA_DRVN_MON_FIELDVAL-DRVDAT, sy-vline,
  WA_DRVN_MON_FIELDVAL-DRVNUM, sy-vline,
  WA_DRVN_MON_FIELDVAL-KPOSN, sy-vline,
  WA_DRVN_MON_FIELDVAL-VALUE, sy-vline,
  WA_DRVN_MON_FIELDVAL-TEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DRVN_MON_FIELDVAL 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_DRVN_MON_FIELDVAL 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_DRVN_MON_FIELDVAL INTO WA_DRVN_MON_FIELDVAL.


*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_DRVN_MON_FIELDVAL_STR, 
DRVNO TYPE STRING,
DRVFL_ICON TYPE STRING,
DRVFL TYPE STRING,
ATWTB TYPE STRING,
DRVCF TYPE STRING,
DRVCHAR TYPE STRING,
DRVDAT TYPE STRING,
DRVNUM TYPE STRING,
KPOSN TYPE STRING,
VALUE TYPE STRING,
TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DRVN_MON_FIELDVAL_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_DRVN_MON_FIELDVAL_STR-DRVNO sy-vline 
WA_DRVN_MON_FIELDVAL_STR-DRVFL_ICON sy-vline 
WA_DRVN_MON_FIELDVAL_STR-DRVFL sy-vline 
WA_DRVN_MON_FIELDVAL_STR-ATWTB sy-vline 
WA_DRVN_MON_FIELDVAL_STR-DRVCF sy-vline 
WA_DRVN_MON_FIELDVAL_STR-DRVCHAR sy-vline 
WA_DRVN_MON_FIELDVAL_STR-DRVDAT sy-vline 
WA_DRVN_MON_FIELDVAL_STR-DRVNUM sy-vline 
WA_DRVN_MON_FIELDVAL_STR-KPOSN sy-vline 
WA_DRVN_MON_FIELDVAL_STR-VALUE sy-vline 
WA_DRVN_MON_FIELDVAL_STR-TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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