ABAP Select data from SAP table RECN_EXTERNAL_OBJECT_ODATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RECN_EXTERNAL_OBJECT_ODATA
*  INTO TABLE @DATA(IT_RECN_EXTERNAL_OBJECT_ODATA2).
*--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_RECN_EXTERNAL_OBJECT_ODATA INDEX 1 INTO DATA(WA_RECN_EXTERNAL_OBJECT_ODATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RECN_EXTERNAL_OBJECT_ODATA>-BUKRS = 1.
<RECN_EXTERNAL_OBJECT_ODATA>-RECNNR = 1.
<RECN_EXTERNAL_OBJECT_ODATA>-OBJTYPE = 1.
<RECN_EXTERNAL_OBJECT_ODATA>-OBJID = 1.
<RECN_EXTERNAL_OBJECT_ODATA>-OBJNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RECN_EXTERNAL_OBJECT_ODATA-VALIDFROM, sy-vline,
  WA_RECN_EXTERNAL_OBJECT_ODATA-TEXT, sy-vline,
  WA_RECN_EXTERNAL_OBJECT_ODATA-VALIDTO, sy-vline,
  WA_RECN_EXTERNAL_OBJECT_ODATA-CITY, sy-vline,
  WA_RECN_EXTERNAL_OBJECT_ODATA-POSTL_COD1, sy-vline,
  WA_RECN_EXTERNAL_OBJECT_ODATA-STREET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RECN_EXTERNAL_OBJECT_ODATA 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_RECN_EXTERNAL_OBJECT_ODATA 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_RECN_EXTERNAL_OBJECT_ODATA INTO WA_RECN_EXTERNAL_OBJECT_ODATA.


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

*Conversion exit REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RECN_EXTERNAL_OBJECT_ODATA-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECN_EXTERNAL_OBJECT_ODATA-VALIDTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MEASTYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RECN_EXTERNAL_OBJECT_ODATA-MEASTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECN_EXTERNAL_OBJECT_ODATA-MEASTYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEASUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RECN_EXTERNAL_OBJECT_ODATA-MEASUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECN_EXTERNAL_OBJECT_ODATA-MEASUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field NEWVALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RECN_EXTERNAL_OBJECT_ODATA-NEWVALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECN_EXTERNAL_OBJECT_ODATA-NEWVALIDTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RECN_EXTERNAL_OBJECT_ODATA-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECN_EXTERNAL_OBJECT_ODATA-SPRAS.
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_RECN_EXTERNAL_OBJECT_ODATA_STR, 
BUKRS TYPE STRING,
RECNNR TYPE STRING,
OBJTYPE TYPE STRING,
OBJID TYPE STRING,
OBJNR TYPE STRING,
VALIDFROM TYPE STRING,
TEXT TYPE STRING,
VALIDTO TYPE STRING,
CITY TYPE STRING,
POSTL_COD1 TYPE STRING,
STREET TYPE STRING,
HOUSE_NO TYPE STRING,
COUNTRY TYPE STRING,
USAGETYPE TYPE STRING,
USAGETYPETEXT TYPE STRING,
FLOORLEVEL TYPE STRING,
FLOORLEVELTEXT TYPE STRING,
MEASTYPE TYPE STRING,
MEASTYPETEXT TYPE STRING,
MEAS TYPE STRING,
MEASUNIT TYPE STRING,
NEWVALIDTO TYPE STRING,
MEMOTEXT TYPE STRING,
SPRAS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RECN_EXTERNAL_OBJECT_ODATA_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_RECN_EXTERNAL_OBJECT_ODATA_STR-BUKRS sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-RECNNR sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-OBJTYPE sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-OBJID sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-OBJNR sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-VALIDFROM sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-TEXT sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-VALIDTO sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-CITY sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-POSTL_COD1 sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-STREET sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-HOUSE_NO sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-COUNTRY sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-USAGETYPE sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-USAGETYPETEXT sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-FLOORLEVEL sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-FLOORLEVELTEXT sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-MEASTYPE sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-MEASTYPETEXT sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-MEAS sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-MEASUNIT sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-NEWVALIDTO sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-MEMOTEXT sy-vline 
WA_RECN_EXTERNAL_OBJECT_ODATA_STR-SPRAS sy-vline      INTO ld_text SEPARATED BY SPACE.

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