ABAP Select data from SAP table VWFPRC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VWFPRC
*  INTO TABLE @DATA(IT_VWFPRC2).
*--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_VWFPRC INDEX 1 INTO DATA(WA_VWFPRC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VWFPRC>-SYST = 1.
<VWFPRC>-MANDT = 1.
<VWFPRC>-PRCNR = 1.
<VWFPRC>-PSYST = 1.
<VWFPRC>-PMANDT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VWFPRC-PARNR, sy-vline,
  WA_VWFPRC-CHNUM, sy-vline,
  WA_VWFPRC-LSYST, sy-vline,
  WA_VWFPRC-LMANDT, sy-vline,
  WA_VWFPRC-LUSER, sy-vline,
  WA_VWFPRC-LDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VWFPRC 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_VWFPRC 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_VWFPRC INTO WA_VWFPRC.


*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 LCHNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VWFPRC-LCHNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VWFPRC-LCHNR.
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_VWFPRC_STR, 
SYST TYPE STRING,
MANDT TYPE STRING,
PRCNR TYPE STRING,
PSYST TYPE STRING,
PMANDT TYPE STRING,
PARNR TYPE STRING,
CHNUM TYPE STRING,
LSYST TYPE STRING,
LMANDT TYPE STRING,
LUSER TYPE STRING,
LDATE TYPE STRING,
LTIME TYPE STRING,
LTEXT TYPE STRING,
LLTEX TYPE STRING,
LCHNR TYPE STRING,
PRCTP TYPE STRING,
PRSTAT TYPE STRING,
SYSTAT TYPE STRING,
INWORK TYPE STRING,
PRPRI TYPE STRING,
ACDAT TYPE STRING,
LADAT TYPE STRING,
LOEDK TYPE STRING,
AUGRP TYPE STRING,
LRCODE TYPE STRING,
LUSERNAM TYPE STRING,
NUSERNAM TYPE STRING,
F_RULEKEY TYPE STRING,
CHANGER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VWFPRC_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_VWFPRC_STR-SYST sy-vline 
WA_VWFPRC_STR-MANDT sy-vline 
WA_VWFPRC_STR-PRCNR sy-vline 
WA_VWFPRC_STR-PSYST sy-vline 
WA_VWFPRC_STR-PMANDT sy-vline 
WA_VWFPRC_STR-PARNR sy-vline 
WA_VWFPRC_STR-CHNUM sy-vline 
WA_VWFPRC_STR-LSYST sy-vline 
WA_VWFPRC_STR-LMANDT sy-vline 
WA_VWFPRC_STR-LUSER sy-vline 
WA_VWFPRC_STR-LDATE sy-vline 
WA_VWFPRC_STR-LTIME sy-vline 
WA_VWFPRC_STR-LTEXT sy-vline 
WA_VWFPRC_STR-LLTEX sy-vline 
WA_VWFPRC_STR-LCHNR sy-vline 
WA_VWFPRC_STR-PRCTP sy-vline 
WA_VWFPRC_STR-PRSTAT sy-vline 
WA_VWFPRC_STR-SYSTAT sy-vline 
WA_VWFPRC_STR-INWORK sy-vline 
WA_VWFPRC_STR-PRPRI sy-vline 
WA_VWFPRC_STR-ACDAT sy-vline 
WA_VWFPRC_STR-LADAT sy-vline 
WA_VWFPRC_STR-LOEDK sy-vline 
WA_VWFPRC_STR-AUGRP sy-vline 
WA_VWFPRC_STR-LRCODE sy-vline 
WA_VWFPRC_STR-LUSERNAM sy-vline 
WA_VWFPRC_STR-NUSERNAM sy-vline 
WA_VWFPRC_STR-F_RULEKEY sy-vline 
WA_VWFPRC_STR-CHANGER sy-vline      INTO ld_text SEPARATED BY SPACE.

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