ABAP Select data from SAP table DFKKINV_REVT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKINV_REVT
*  INTO TABLE @DATA(IT_DFKKINV_REVT2).
*--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_DFKKINV_REVT INDEX 1 INTO DATA(WA_DFKKINV_REVT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKINV_REVT>-MANDT = 1.
<DFKKINV_REVT>-REVTASK = 1.
<DFKKINV_REVT>-REVTASK_DESC = 1.
<DFKKINV_REVT>-REVTASK_REF = 1.
<DFKKINV_REVT>-CRNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKINV_REVT-CRDATE, sy-vline,
  WA_DFKKINV_REVT-CRTIME, sy-vline,
  WA_DFKKINV_REVT-CHNAME, sy-vline,
  WA_DFKKINV_REVT-CHDATE, sy-vline,
  WA_DFKKINV_REVT-CHTIME, sy-vline,
  WA_DFKKINV_REVT-REVSTATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKINV_REVT 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_DFKKINV_REVT 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_DFKKINV_REVT INTO WA_DFKKINV_REVT.


*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_DFKKINV_REVT_STR, 
MANDT TYPE STRING,
REVTASK TYPE STRING,
REVTASK_DESC TYPE STRING,
REVTASK_REF TYPE STRING,
CRNAME TYPE STRING,
CRDATE TYPE STRING,
CRTIME TYPE STRING,
CHNAME TYPE STRING,
CHDATE TYPE STRING,
CHTIME TYPE STRING,
REVSTATUS TYPE STRING,
XREVLOCKED TYPE STRING,
LOEDT TYPE STRING,
XCREATE_REV_BIT TYPE STRING,
XCREATE_REV_BILL TYPE STRING,
XCREATE_REV_INV TYPE STRING,
XCREATE_REV_RERATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKINV_REVT_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_DFKKINV_REVT_STR-MANDT sy-vline 
WA_DFKKINV_REVT_STR-REVTASK sy-vline 
WA_DFKKINV_REVT_STR-REVTASK_DESC sy-vline 
WA_DFKKINV_REVT_STR-REVTASK_REF sy-vline 
WA_DFKKINV_REVT_STR-CRNAME sy-vline 
WA_DFKKINV_REVT_STR-CRDATE sy-vline 
WA_DFKKINV_REVT_STR-CRTIME sy-vline 
WA_DFKKINV_REVT_STR-CHNAME sy-vline 
WA_DFKKINV_REVT_STR-CHDATE sy-vline 
WA_DFKKINV_REVT_STR-CHTIME sy-vline 
WA_DFKKINV_REVT_STR-REVSTATUS sy-vline 
WA_DFKKINV_REVT_STR-XREVLOCKED sy-vline 
WA_DFKKINV_REVT_STR-LOEDT sy-vline 
WA_DFKKINV_REVT_STR-XCREATE_REV_BIT sy-vline 
WA_DFKKINV_REVT_STR-XCREATE_REV_BILL sy-vline 
WA_DFKKINV_REVT_STR-XCREATE_REV_INV sy-vline 
WA_DFKKINV_REVT_STR-XCREATE_REV_RERATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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