ABAP Select data from SAP table ODATA_CV_DOCUMENTHEADERDRAFT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ODATA_CV_DOCUMENTHEADERDRAFT
*  INTO TABLE @DATA(IT_ODATA_CV_DOCUMENTHEADERDRAFT2).
*--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_ODATA_CV_DOCUMENTHEADERDRAFT INDEX 1 INTO DATA(WA_ODATA_CV_DOCUMENTHEADERDRAFT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ODATA_CV_DOCUMENTHEADERDRAFT>-DRAFTUUID = 1.
<ODATA_CV_DOCUMENTHEADERDRAFT>-DOCUMENTINFORECORDDOCTYPE = 1.
<ODATA_CV_DOCUMENTHEADERDRAFT>-DOCUMENTINFORECORDDOCNUMBER = 1.
<ODATA_CV_DOCUMENTHEADERDRAFT>-DOCUMENTINFORECORDDOCVERSION = 1.
<ODATA_CV_DOCUMENTHEADERDRAFT>-DOCUMENTINFORECORDDOCPART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ODATA_CV_DOCUMENTHEADERDRAFT-DOCUMENTDESCRIPTION, sy-vline,
  WA_ODATA_CV_DOCUMENTHEADERDRAFT-CREATEDBYUSER, sy-vline,
  WA_ODATA_CV_DOCUMENTHEADERDRAFT-CREATIONDATETIME, sy-vline,
  WA_ODATA_CV_DOCUMENTHEADERDRAFT-DOCINFORECDISMARKEDFORDELETION, sy-vline,
  WA_ODATA_CV_DOCUMENTHEADERDRAFT-ISDOCINFORECDCREATEDFROMCAD, sy-vline,
  WA_ODATA_CV_DOCUMENTHEADERDRAFT-ISDOCINFORECDSTRUCTURE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ODATA_CV_DOCUMENTHEADERDRAFT 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_ODATA_CV_DOCUMENTHEADERDRAFT 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_ODATA_CV_DOCUMENTHEADERDRAFT INTO WA_ODATA_CV_DOCUMENTHEADERDRAFT.


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

*Conversion exit TSTLC, internal->external for field CREATIONDATETIME
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_ODATA_CV_DOCUMENTHEADERDRAFT-CREATIONDATETIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ODATA_CV_DOCUMENTHEADERDRAFT-CREATIONDATETIME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTLC, internal->external for field CHANGEDDATETIME
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_ODATA_CV_DOCUMENTHEADERDRAFT-CHANGEDDATETIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ODATA_CV_DOCUMENTHEADERDRAFT-CHANGEDDATETIME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOCINFORECDSOURCEDOCNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ODATA_CV_DOCUMENTHEADERDRAFT-DOCINFORECDSOURCEDOCNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ODATA_CV_DOCUMENTHEADERDRAFT-DOCINFORECDSOURCEDOCNUMBER.
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_ODATA_CV_DOCUMENTHEADERDRAFT_STR, 
DRAFTUUID TYPE STRING,
DOCUMENTINFORECORDDOCTYPE TYPE STRING,
DOCUMENTINFORECORDDOCNUMBER TYPE STRING,
DOCUMENTINFORECORDDOCVERSION TYPE STRING,
DOCUMENTINFORECORDDOCPART TYPE STRING,
DOCUMENTDESCRIPTION TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATETIME TYPE STRING,
DOCINFORECDISMARKEDFORDELETION TYPE STRING,
ISDOCINFORECDCREATEDFROMCAD TYPE STRING,
ISDOCINFORECDSTRUCTURE TYPE STRING,
INTERNALDOCUMENTSTATUS TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
CHANGEDDATETIME TYPE STRING,
LABORATORYORDESIGNOFFICE TYPE STRING,
DOCINFORECDSOURCEDOCNUMBER TYPE STRING,
DOCINFORECDSOURCEDOCVERSION TYPE STRING,
DOCINFORECDSOURCEDOCPART TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ODATA_CV_DOCUMENTHEADERDRAFT_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_ODATA_CV_DOCUMENTHEADERDRAFT_STR-DRAFTUUID sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-DOCUMENTINFORECORDDOCTYPE sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-DOCUMENTINFORECORDDOCNUMBER sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-DOCUMENTINFORECORDDOCVERSION sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-DOCUMENTINFORECORDDOCPART sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-DOCUMENTDESCRIPTION sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-CREATEDBYUSER sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-CREATIONDATETIME sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-DOCINFORECDISMARKEDFORDELETION sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-ISDOCINFORECDCREATEDFROMCAD sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-ISDOCINFORECDSTRUCTURE sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-INTERNALDOCUMENTSTATUS sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-AUTHORIZATIONGROUP sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-LASTCHANGEDBYUSER sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-CHANGEDDATETIME sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-LABORATORYORDESIGNOFFICE sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-DOCINFORECDSOURCEDOCNUMBER sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-DOCINFORECDSOURCEDOCVERSION sy-vline 
WA_ODATA_CV_DOCUMENTHEADERDRAFT_STR-DOCINFORECDSOURCEDOCPART sy-vline      INTO ld_text SEPARATED BY SPACE.

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