ABAP Select data from SAP table QPRVK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QPRVK
*  INTO TABLE @DATA(IT_QPRVK2).
*--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_QPRVK INDEX 1 INTO DATA(WA_QPRVK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QPRVK>-MANDT = 1.
<QPRVK>-PRZIEHVERF = 1.
<QPRVK>-VERSION = 1.
<QPRVK>-GUELTIGAB = 1.
<QPRVK>-SORTFELD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QPRVK-QMASTAUTH, sy-vline,
  WA_QPRVK-GEBANZ, sy-vline,
  WA_QPRVK-KZQUIT, sy-vline,
  WA_QPRVK-ERSTELLER, sy-vline,
  WA_QPRVK-AENDERER, sy-vline,
  WA_QPRVK-DATUMERST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QPRVK 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_QPRVK 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_QPRVK INTO WA_QPRVK.


*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 VERSION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QPRVK-VERSION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QPRVK-VERSION.
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_QPRVK_STR, 
MANDT TYPE STRING,
PRZIEHVERF TYPE STRING,
VERSION TYPE STRING,
GUELTIGAB TYPE STRING,
SORTFELD TYPE STRING,
QMASTAUTH TYPE STRING,
GEBANZ TYPE STRING,
KZQUIT TYPE STRING,
ERSTELLER TYPE STRING,
AENDERER TYPE STRING,
DATUMERST TYPE STRING,
ZEITERST TYPE STRING,
DATUMAEND TYPE STRING,
ZEITAEND TYPE STRING,
KZNVPRZV TYPE STRING,
KZVPRZVPL TYPE STRING,
DUMMY_QPRVK_INCL_EEW_PS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QPRVK_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_QPRVK_STR-MANDT sy-vline 
WA_QPRVK_STR-PRZIEHVERF sy-vline 
WA_QPRVK_STR-VERSION sy-vline 
WA_QPRVK_STR-GUELTIGAB sy-vline 
WA_QPRVK_STR-SORTFELD sy-vline 
WA_QPRVK_STR-QMASTAUTH sy-vline 
WA_QPRVK_STR-GEBANZ sy-vline 
WA_QPRVK_STR-KZQUIT sy-vline 
WA_QPRVK_STR-ERSTELLER sy-vline 
WA_QPRVK_STR-AENDERER sy-vline 
WA_QPRVK_STR-DATUMERST sy-vline 
WA_QPRVK_STR-ZEITERST sy-vline 
WA_QPRVK_STR-DATUMAEND sy-vline 
WA_QPRVK_STR-ZEITAEND sy-vline 
WA_QPRVK_STR-KZNVPRZV sy-vline 
WA_QPRVK_STR-KZVPRZVPL sy-vline 
WA_QPRVK_STR-DUMMY_QPRVK_INCL_EEW_PS sy-vline      INTO ld_text SEPARATED BY SPACE.

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