ABAP Select data from SAP table SDRVKRE71 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SDRVKRE71 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 SDRVKRE71. 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 SDRVKRE71 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_SDRVKRE71 TYPE STANDARD TABLE OF SDRVKRE71,
      WA_SDRVKRE71 TYPE SDRVKRE71,
      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: <SDRVKRE71> TYPE SDRVKRE71.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_SDRVKRE71.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SDRVKRE71
  INTO TABLE IT_SDRVKRE71.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SDRVKRE71
*  INTO TABLE @DATA(IT_SDRVKRE712).
*--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_SDRVKRE71 INDEX 1 INTO DATA(WA_SDRVKRE712).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SDRVKRE71 ASSIGNING <SDRVKRE71>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SDRVKRE71>-KKBER = 1.
<SDRVKRE71>-KNKLI = 1.
<SDRVKRE71>-CMWAE = 1.
<SDRVKRE71>-VBELN = 1.
<SDRVKRE71>-VBTYP = 1.

ENDLOOP.

LOOP AT IT_SDRVKRE71 INTO WA_SDRVKRE71.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SDRVKRE71-OEIKW, sy-vline,
  WA_SDRVKRE71-OLIKW, sy-vline,
  WA_SDRVKRE71-OFAKW, sy-vline,
  WA_SDRVKRE71-SPTAG, sy-vline,
  WA_SDRVKRE71-SPWOC, sy-vline,
  WA_SDRVKRE71-SPMON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SDRVKRE71 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_SDRVKRE71 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_SDRVKRE71 INTO WA_SDRVKRE71.


*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.

*Conversion exit ALPHA, internal->external for field KNKLI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SDRVKRE71-KNKLI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SDRVKRE71-KNKLI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SDRVKRE71-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SDRVKRE71-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI, internal->external for field SPWOC
CALL FUNCTION 'CONVERSION_EXIT_PERI_OUTPUT'
  EXPORTING
    input =                      WA_SDRVKRE71-SPWOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SDRVKRE71-SPWOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI, internal->external for field SPMON
CALL FUNCTION 'CONVERSION_EXIT_PERI_OUTPUT'
  EXPORTING
    input =                      WA_SDRVKRE71-SPMON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SDRVKRE71-SPMON.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_SDRVKRE71_STR, 
KKBER TYPE STRING,
KNKLI TYPE STRING,
CMWAE TYPE STRING,
VBELN TYPE STRING,
VBTYP TYPE STRING,
OEIKW TYPE STRING,
OLIKW TYPE STRING,
OFAKW TYPE STRING,
SPTAG TYPE STRING,
SPWOC TYPE STRING,
SPMON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SDRVKRE71_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_SDRVKRE71_STR-KKBER sy-vline 
WA_SDRVKRE71_STR-KNKLI sy-vline 
WA_SDRVKRE71_STR-CMWAE sy-vline 
WA_SDRVKRE71_STR-VBELN sy-vline 
WA_SDRVKRE71_STR-VBTYP sy-vline 
WA_SDRVKRE71_STR-OEIKW sy-vline 
WA_SDRVKRE71_STR-OLIKW sy-vline 
WA_SDRVKRE71_STR-OFAKW sy-vline 
WA_SDRVKRE71_STR-SPTAG sy-vline 
WA_SDRVKRE71_STR-SPWOC sy-vline 
WA_SDRVKRE71_STR-SPMON sy-vline      INTO ld_text SEPARATED BY SPACE.

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