ABAP Select data from SAP table CDESK_MULTI_DOC_STRUCTURE into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP CDESK_MULTI_DOC_STRUCTURE 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_MULTI_DOC_STRUCTURE. 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_MULTI_DOC_STRUCTURE 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_MULTI_DOC_STRUCTURE TYPE STANDARD TABLE OF CDESK_MULTI_DOC_STRUCTURE,
      WA_CDESK_MULTI_DOC_STRUCTURE TYPE CDESK_MULTI_DOC_STRUCTURE,
      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_MULTI_DOC_STRUCTURE> TYPE CDESK_MULTI_DOC_STRUCTURE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CDESK_MULTI_DOC_STRUCTURE
*  INTO TABLE @DATA(IT_CDESK_MULTI_DOC_STRUCTURE2).
*--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_MULTI_DOC_STRUCTURE INDEX 1 INTO DATA(WA_CDESK_MULTI_DOC_STRUCTURE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CDESK_MULTI_DOC_STRUCTURE>-DOCUMENTTYPEPAR = 1.
<CDESK_MULTI_DOC_STRUCTURE>-DOCUMENTNUMBERPAR = 1.
<CDESK_MULTI_DOC_STRUCTURE>-DOCUMENTVERSIONPAR = 1.
<CDESK_MULTI_DOC_STRUCTURE>-DOCUMENTPARTPAR = 1.
<CDESK_MULTI_DOC_STRUCTURE>-DELETEVALUE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CDESK_MULTI_DOC_STRUCTURE-DOCUMENTTYPE, sy-vline,
  WA_CDESK_MULTI_DOC_STRUCTURE-DOCUMENTNUMBER, sy-vline,
  WA_CDESK_MULTI_DOC_STRUCTURE-DOCUMENTPART, sy-vline,
  WA_CDESK_MULTI_DOC_STRUCTURE-DOCUMENTVERSION, sy-vline,
  WA_CDESK_MULTI_DOC_STRUCTURE-QUANTITY, sy-vline,
  WA_CDESK_MULTI_DOC_STRUCTURE-SORTSTRING, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CDESK_MULTI_DOC_STRUCTURE 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_MULTI_DOC_STRUCTURE 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_MULTI_DOC_STRUCTURE INTO WA_CDESK_MULTI_DOC_STRUCTURE.


*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 DOCUMENTNUMBERPAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CDESK_MULTI_DOC_STRUCTURE-DOCUMENTNUMBERPAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDESK_MULTI_DOC_STRUCTURE-DOCUMENTNUMBERPAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOCUMENTNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CDESK_MULTI_DOC_STRUCTURE-DOCUMENTNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDESK_MULTI_DOC_STRUCTURE-DOCUMENTNUMBER.
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_MULTI_DOC_STRUCTURE_STR, 
DOCUMENTTYPEPAR TYPE STRING,
DOCUMENTNUMBERPAR TYPE STRING,
DOCUMENTVERSIONPAR TYPE STRING,
DOCUMENTPARTPAR TYPE STRING,
DELETEVALUE TYPE STRING,
DOCUMENTTYPE TYPE STRING,
DOCUMENTNUMBER TYPE STRING,
DOCUMENTPART TYPE STRING,
DOCUMENTVERSION TYPE STRING,
QUANTITY TYPE STRING,
SORTSTRING TYPE STRING,
RECALLOWED TYPE STRING,
CAD_POS TYPE STRING,
FILENAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CDESK_MULTI_DOC_STRUCTURE_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_MULTI_DOC_STRUCTURE_STR-DOCUMENTTYPEPAR sy-vline 
WA_CDESK_MULTI_DOC_STRUCTURE_STR-DOCUMENTNUMBERPAR sy-vline 
WA_CDESK_MULTI_DOC_STRUCTURE_STR-DOCUMENTVERSIONPAR sy-vline 
WA_CDESK_MULTI_DOC_STRUCTURE_STR-DOCUMENTPARTPAR sy-vline 
WA_CDESK_MULTI_DOC_STRUCTURE_STR-DELETEVALUE sy-vline 
WA_CDESK_MULTI_DOC_STRUCTURE_STR-DOCUMENTTYPE sy-vline 
WA_CDESK_MULTI_DOC_STRUCTURE_STR-DOCUMENTNUMBER sy-vline 
WA_CDESK_MULTI_DOC_STRUCTURE_STR-DOCUMENTPART sy-vline 
WA_CDESK_MULTI_DOC_STRUCTURE_STR-DOCUMENTVERSION sy-vline 
WA_CDESK_MULTI_DOC_STRUCTURE_STR-QUANTITY sy-vline 
WA_CDESK_MULTI_DOC_STRUCTURE_STR-SORTSTRING sy-vline 
WA_CDESK_MULTI_DOC_STRUCTURE_STR-RECALLOWED sy-vline 
WA_CDESK_MULTI_DOC_STRUCTURE_STR-CAD_POS sy-vline 
WA_CDESK_MULTI_DOC_STRUCTURE_STR-FILENAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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