ABAP Select data from SAP table WWORKPAPER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WWORKPAPER
*  INTO TABLE @DATA(IT_WWORKPAPER2).
*--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_WWORKPAPER INDEX 1 INTO DATA(WA_WWORKPAPER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WWORKPAPER>-PM_APPL = 1.
<WWORKPAPER>-WORKPAPER = 1.
<WWORKPAPER>-TDDEST = 1.
<WWORKPAPER>-TDCOPIES = 1.
<WWORKPAPER>-TDNEWID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WWORKPAPER-TDIMMED, sy-vline,
  WA_WWORKPAPER-TDDELETE, sy-vline,
  WA_WWORKPAPER-TDCOVER, sy-vline,
  WA_WWORKPAPER-TDCOVTITLE, sy-vline,
  WA_WWORKPAPER-TDRECEIVER, sy-vline,
  WA_WWORKPAPER-SELECTED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WWORKPAPER 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_WWORKPAPER 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_WWORKPAPER INTO WA_WWORKPAPER.


*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 SPDEV, internal->external for field TDDEST
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_WWORKPAPER-TDDEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WWORKPAPER-TDDEST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field PRINT_LANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_WWORKPAPER-PRINT_LANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WWORKPAPER-PRINT_LANG.
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_WWORKPAPER_STR, 
PM_APPL TYPE STRING,
WORKPAPER TYPE STRING,
TDDEST TYPE STRING,
TDCOPIES TYPE STRING,
TDNEWID TYPE STRING,
TDIMMED TYPE STRING,
TDDELETE TYPE STRING,
TDCOVER TYPE STRING,
TDCOVTITLE TYPE STRING,
TDRECEIVER TYPE STRING,
SELECTED TYPE STRING,
PRINT_LANG TYPE STRING,
TDARMOD TYPE STRING,
PM_DELTA_P TYPE STRING,
OPER_STAT TYPE STRING,
MAT_STAT TYPE STRING,
LODR_FLAG TYPE STRING,
RUDR_FLAG TYPE STRING,
TDTELENUM TYPE STRING,
TDTELELAND TYPE STRING,
JOB_CARD TYPE STRING,
PDF_DATA TYPE STRING,
PAPERTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WWORKPAPER_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_WWORKPAPER_STR-PM_APPL sy-vline 
WA_WWORKPAPER_STR-WORKPAPER sy-vline 
WA_WWORKPAPER_STR-TDDEST sy-vline 
WA_WWORKPAPER_STR-TDCOPIES sy-vline 
WA_WWORKPAPER_STR-TDNEWID sy-vline 
WA_WWORKPAPER_STR-TDIMMED sy-vline 
WA_WWORKPAPER_STR-TDDELETE sy-vline 
WA_WWORKPAPER_STR-TDCOVER sy-vline 
WA_WWORKPAPER_STR-TDCOVTITLE sy-vline 
WA_WWORKPAPER_STR-TDRECEIVER sy-vline 
WA_WWORKPAPER_STR-SELECTED sy-vline 
WA_WWORKPAPER_STR-PRINT_LANG sy-vline 
WA_WWORKPAPER_STR-TDARMOD sy-vline 
WA_WWORKPAPER_STR-PM_DELTA_P sy-vline 
WA_WWORKPAPER_STR-OPER_STAT sy-vline 
WA_WWORKPAPER_STR-MAT_STAT sy-vline 
WA_WWORKPAPER_STR-LODR_FLAG sy-vline 
WA_WWORKPAPER_STR-RUDR_FLAG sy-vline 
WA_WWORKPAPER_STR-TDTELENUM sy-vline 
WA_WWORKPAPER_STR-TDTELELAND sy-vline 
WA_WWORKPAPER_STR-JOB_CARD sy-vline 
WA_WWORKPAPER_STR-PDF_DATA sy-vline 
WA_WWORKPAPER_STR-PAPERTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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