ABAP Select data from SAP table CDESK_DRAW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CDESK_DRAW
*  INTO TABLE @DATA(IT_CDESK_DRAW2).
*--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_CDESK_DRAW INDEX 1 INTO DATA(WA_CDESK_DRAW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CDESK_DRAW>-MANDT = 1.
<CDESK_DRAW>-DOKAR = 1.
<CDESK_DRAW>-DOKNR = 1.
<CDESK_DRAW>-DOKVR = 1.
<CDESK_DRAW>-DOKTL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CDESK_DRAW-SUBTYPE, sy-vline,
  WA_CDESK_DRAW-MASTER, sy-vline,
  WA_CDESK_DRAW-FAMILY, sy-vline,
  WA_CDESK_DRAW-DIRTY, sy-vline,
  WA_CDESK_DRAW-MAT_AVAILABLE, sy-vline,
  WA_CDESK_DRAW-NM_AVAILABLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CDESK_DRAW 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_CDESK_DRAW 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_CDESK_DRAW INTO WA_CDESK_DRAW.


*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 DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CDESK_DRAW-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDESK_DRAW-DOKNR.
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_CDESK_DRAW_STR, 
MANDT TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
SUBTYPE TYPE STRING,
MASTER TYPE STRING,
FAMILY TYPE STRING,
DIRTY TYPE STRING,
MAT_AVAILABLE TYPE STRING,
NM_AVAILABLE TYPE STRING,
CAD_VERSION TYPE STRING,
CAD_ENV TYPE STRING,
CUST_ENV TYPE STRING,
CAD_VARIANT_ID TYPE STRING,
CHECKIN_DATE TYPE STRING,
VIEWABLES_UPD TYPE STRING,
REFSETS TYPE STRING,
COMPSETS TYPE STRING,
BOUNDING1X TYPE STRING,
BOUNDING1Y TYPE STRING,
BOUNDING1Z TYPE STRING,
BOUNDING2X TYPE STRING,
BOUNDING2Y TYPE STRING,
BOUNDING2Z TYPE STRING,
RES5 TYPE STRING,
RES6 TYPE STRING,
RES7 TYPE STRING,
RES8 TYPE STRING,
FLAG1 TYPE STRING,
FLAG2 TYPE STRING,
FLAG3 TYPE STRING,
FLAG4 TYPE STRING,
GUIDX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CDESK_DRAW_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_CDESK_DRAW_STR-MANDT sy-vline 
WA_CDESK_DRAW_STR-DOKAR sy-vline 
WA_CDESK_DRAW_STR-DOKNR sy-vline 
WA_CDESK_DRAW_STR-DOKVR sy-vline 
WA_CDESK_DRAW_STR-DOKTL sy-vline 
WA_CDESK_DRAW_STR-SUBTYPE sy-vline 
WA_CDESK_DRAW_STR-MASTER sy-vline 
WA_CDESK_DRAW_STR-FAMILY sy-vline 
WA_CDESK_DRAW_STR-DIRTY sy-vline 
WA_CDESK_DRAW_STR-MAT_AVAILABLE sy-vline 
WA_CDESK_DRAW_STR-NM_AVAILABLE sy-vline 
WA_CDESK_DRAW_STR-CAD_VERSION sy-vline 
WA_CDESK_DRAW_STR-CAD_ENV sy-vline 
WA_CDESK_DRAW_STR-CUST_ENV sy-vline 
WA_CDESK_DRAW_STR-CAD_VARIANT_ID sy-vline 
WA_CDESK_DRAW_STR-CHECKIN_DATE sy-vline 
WA_CDESK_DRAW_STR-VIEWABLES_UPD sy-vline 
WA_CDESK_DRAW_STR-REFSETS sy-vline 
WA_CDESK_DRAW_STR-COMPSETS sy-vline 
WA_CDESK_DRAW_STR-BOUNDING1X sy-vline 
WA_CDESK_DRAW_STR-BOUNDING1Y sy-vline 
WA_CDESK_DRAW_STR-BOUNDING1Z sy-vline 
WA_CDESK_DRAW_STR-BOUNDING2X sy-vline 
WA_CDESK_DRAW_STR-BOUNDING2Y sy-vline 
WA_CDESK_DRAW_STR-BOUNDING2Z sy-vline 
WA_CDESK_DRAW_STR-RES5 sy-vline 
WA_CDESK_DRAW_STR-RES6 sy-vline 
WA_CDESK_DRAW_STR-RES7 sy-vline 
WA_CDESK_DRAW_STR-RES8 sy-vline 
WA_CDESK_DRAW_STR-FLAG1 sy-vline 
WA_CDESK_DRAW_STR-FLAG2 sy-vline 
WA_CDESK_DRAW_STR-FLAG3 sy-vline 
WA_CDESK_DRAW_STR-FLAG4 sy-vline 
WA_CDESK_DRAW_STR-GUIDX sy-vline      INTO ld_text SEPARATED BY SPACE.

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