ABAP Select data from SAP table QDWP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QDWP
*  INTO TABLE @DATA(IT_QDWP2).
*--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_QDWP INDEX 1 INTO DATA(WA_QDWP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QDWP>-STPRPLAN = 1.
<QDWP>-KOPIERVORL = 1.
<QDWP>-KURZTEXT = 1.
<QDWP>-PLANTEXT = 1.
<QDWP>-SEL_FLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QDWP-SCHTEXT, sy-vline,
  WA_QDWP-AQLTEXT, sy-vline,
  WA_QDWP-KZ, sy-vline,
  WA_QDWP-ANZTAB, sy-vline,
  WA_QDWP-TXTANZTAB1, sy-vline,
  WA_QDWP-TXTANZTAB2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QDWP 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_QDWP 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_QDWP INTO WA_QDWP.


*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.
ENDFORM. 

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

TYPES: BEGIN OF T_QDWP_STR, 
STPRPLAN TYPE STRING,
KOPIERVORL TYPE STRING,
KURZTEXT TYPE STRING,
PLANTEXT TYPE STRING,
SEL_FLG TYPE STRING,
SCHTEXT TYPE STRING,
AQLTEXT TYPE STRING,
KZ TYPE STRING,
ANZTAB TYPE STRING,
TXTANZTAB1 TYPE STRING,
TXTANZTAB2 TYPE STRING,
BEARBEIT TYPE STRING,
ANZEIGEN TYPE STRING,
KZFWANZTAB TYPE STRING,
AQLWERT TYPE STRING,
PRSCHAERFE TYPE STRING,
PRSCHTEXT TYPE STRING,
NEU TYPE STRING,
KZVORL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QDWP_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_QDWP_STR-STPRPLAN sy-vline 
WA_QDWP_STR-KOPIERVORL sy-vline 
WA_QDWP_STR-KURZTEXT sy-vline 
WA_QDWP_STR-PLANTEXT sy-vline 
WA_QDWP_STR-SEL_FLG sy-vline 
WA_QDWP_STR-SCHTEXT sy-vline 
WA_QDWP_STR-AQLTEXT sy-vline 
WA_QDWP_STR-KZ sy-vline 
WA_QDWP_STR-ANZTAB sy-vline 
WA_QDWP_STR-TXTANZTAB1 sy-vline 
WA_QDWP_STR-TXTANZTAB2 sy-vline 
WA_QDWP_STR-BEARBEIT sy-vline 
WA_QDWP_STR-ANZEIGEN sy-vline 
WA_QDWP_STR-KZFWANZTAB sy-vline 
WA_QDWP_STR-AQLWERT sy-vline 
WA_QDWP_STR-PRSCHAERFE sy-vline 
WA_QDWP_STR-PRSCHTEXT sy-vline 
WA_QDWP_STR-NEU sy-vline 
WA_QDWP_STR-KZVORL sy-vline      INTO ld_text SEPARATED BY SPACE.

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