ABAP Select data from SAP table WFPRC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WFPRC
*  INTO TABLE @DATA(IT_WFPRC2).
*--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_WFPRC INDEX 1 INTO DATA(WA_WFPRC2).


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

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

ENDLOOP.

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

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


*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_WFPRC-LCHNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFPRC-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_WFPRC_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,END OF T_EKKO_STR.
DATA: WA_WFPRC_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_WFPRC_STR-SYST sy-vline 
WA_WFPRC_STR-MANDT sy-vline 
WA_WFPRC_STR-PRCNR sy-vline 
WA_WFPRC_STR-PSYST sy-vline 
WA_WFPRC_STR-PMANDT sy-vline 
WA_WFPRC_STR-PARNR sy-vline 
WA_WFPRC_STR-CHNUM sy-vline 
WA_WFPRC_STR-LSYST sy-vline 
WA_WFPRC_STR-LMANDT sy-vline 
WA_WFPRC_STR-LUSER sy-vline 
WA_WFPRC_STR-LDATE sy-vline 
WA_WFPRC_STR-LTIME sy-vline 
WA_WFPRC_STR-LTEXT sy-vline 
WA_WFPRC_STR-LLTEX sy-vline 
WA_WFPRC_STR-LCHNR sy-vline 
WA_WFPRC_STR-PRCTP sy-vline 
WA_WFPRC_STR-PRSTAT sy-vline 
WA_WFPRC_STR-SYSTAT sy-vline 
WA_WFPRC_STR-INWORK sy-vline 
WA_WFPRC_STR-PRPRI sy-vline 
WA_WFPRC_STR-ACDAT sy-vline 
WA_WFPRC_STR-LADAT sy-vline 
WA_WFPRC_STR-LOEDK sy-vline 
WA_WFPRC_STR-AUGRP sy-vline 
WA_WFPRC_STR-LRCODE sy-vline 
WA_WFPRC_STR-LUSERNAM sy-vline 
WA_WFPRC_STR-NUSERNAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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