ABAP Select data from SAP table Q0PDWC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP Q0PDWC 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 Q0PDWC. 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 Q0PDWC 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_Q0PDWC TYPE STANDARD TABLE OF Q0PDWC,
      WA_Q0PDWC TYPE Q0PDWC,
      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: <Q0PDWC> TYPE Q0PDWC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_Q0PDWC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM Q0PDWC
  INTO TABLE IT_Q0PDWC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM Q0PDWC
*  INTO TABLE @DATA(IT_Q0PDWC2).
*--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_Q0PDWC INDEX 1 INTO DATA(WA_Q0PDWC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_Q0PDWC ASSIGNING <Q0PDWC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<Q0PDWC>-TYP10 = 1.
<Q0PDWC>-TYP11 = 1.
<Q0PDWC>-TYP12 = 1.
<Q0PDWC>-TYP13 = 1.
<Q0PDWC>-TYP14 = 1.

ENDLOOP.

LOOP AT IT_Q0PDWC INTO WA_Q0PDWC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_Q0PDWC-TYP15, sy-vline,
  WA_Q0PDWC-TYP16, sy-vline,
  WA_Q0PDWC-TYP17, sy-vline,
  WA_Q0PDWC-TYP18, sy-vline,
  WA_Q0PDWC-TYP19, sy-vline,
  WA_Q0PDWC-TYP1A, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_Q0PDWC 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_Q0PDWC 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_Q0PDWC INTO WA_Q0PDWC.


*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_Q0PDWC_STR, 
TYP10 TYPE STRING,
TYP11 TYPE STRING,
TYP12 TYPE STRING,
TYP13 TYPE STRING,
TYP14 TYPE STRING,
TYP15 TYPE STRING,
TYP16 TYPE STRING,
TYP17 TYPE STRING,
TYP18 TYPE STRING,
TYP19 TYPE STRING,
TYP1A TYPE STRING,
TYP1N TYPE STRING,
TYP20 TYPE STRING,
TYP21 TYPE STRING,
TYP22 TYPE STRING,
TYP23 TYPE STRING,
TYP24 TYPE STRING,
TYP25 TYPE STRING,
TYP26 TYPE STRING,
TYP27 TYPE STRING,
TYP28 TYPE STRING,
TYP29 TYPE STRING,
TYP2A TYPE STRING,
TYP2N TYPE STRING,
ICO42 TYPE STRING,
ICO44 TYPE STRING,
ANRTY_TXT TYPE STRING,
FPARM TYPE STRING,
FPAR1_TXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_Q0PDWC_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_Q0PDWC_STR-TYP10 sy-vline 
WA_Q0PDWC_STR-TYP11 sy-vline 
WA_Q0PDWC_STR-TYP12 sy-vline 
WA_Q0PDWC_STR-TYP13 sy-vline 
WA_Q0PDWC_STR-TYP14 sy-vline 
WA_Q0PDWC_STR-TYP15 sy-vline 
WA_Q0PDWC_STR-TYP16 sy-vline 
WA_Q0PDWC_STR-TYP17 sy-vline 
WA_Q0PDWC_STR-TYP18 sy-vline 
WA_Q0PDWC_STR-TYP19 sy-vline 
WA_Q0PDWC_STR-TYP1A sy-vline 
WA_Q0PDWC_STR-TYP1N sy-vline 
WA_Q0PDWC_STR-TYP20 sy-vline 
WA_Q0PDWC_STR-TYP21 sy-vline 
WA_Q0PDWC_STR-TYP22 sy-vline 
WA_Q0PDWC_STR-TYP23 sy-vline 
WA_Q0PDWC_STR-TYP24 sy-vline 
WA_Q0PDWC_STR-TYP25 sy-vline 
WA_Q0PDWC_STR-TYP26 sy-vline 
WA_Q0PDWC_STR-TYP27 sy-vline 
WA_Q0PDWC_STR-TYP28 sy-vline 
WA_Q0PDWC_STR-TYP29 sy-vline 
WA_Q0PDWC_STR-TYP2A sy-vline 
WA_Q0PDWC_STR-TYP2N sy-vline 
WA_Q0PDWC_STR-ICO42 sy-vline 
WA_Q0PDWC_STR-ICO44 sy-vline 
WA_Q0PDWC_STR-ANRTY_TXT sy-vline 
WA_Q0PDWC_STR-FPARM sy-vline 
WA_Q0PDWC_STR-FPAR1_TXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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