ABAP Select data from SAP table BUP_S_RELX_CHECK_EXTERNAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BUP_S_RELX_CHECK_EXTERNAL
*  INTO TABLE @DATA(IT_BUP_S_RELX_CHECK_EXTERNAL2).
*--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_BUP_S_RELX_CHECK_EXTERNAL INDEX 1 INTO DATA(WA_BUP_S_RELX_CHECK_EXTERNAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BUP_S_RELX_CHECK_EXTERNAL>-CLIENT = 1.
<BUP_S_RELX_CHECK_EXTERNAL>-RELNR = 1.
<BUP_S_RELX_CHECK_EXTERNAL>-PARTNER1 = 1.
<BUP_S_RELX_CHECK_EXTERNAL>-PARTNER2 = 1.
<BUP_S_RELX_CHECK_EXTERNAL>-DATE_TO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BUP_S_RELX_CHECK_EXTERNAL-DATE_FROM, sy-vline,
  WA_BUP_S_RELX_CHECK_EXTERNAL-RELTYP, sy-vline,
  WA_BUP_S_RELX_CHECK_EXTERNAL-XRF, sy-vline,
  WA_BUP_S_RELX_CHECK_EXTERNAL-DFTVAL, sy-vline,
  WA_BUP_S_RELX_CHECK_EXTERNAL-RLTYP, sy-vline,
  WA_BUP_S_RELX_CHECK_EXTERNAL-RELKIND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BUP_S_RELX_CHECK_EXTERNAL 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_BUP_S_RELX_CHECK_EXTERNAL 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_BUP_S_RELX_CHECK_EXTERNAL INTO WA_BUP_S_RELX_CHECK_EXTERNAL.


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

*Conversion exit ALPHA, internal->external for field PARTNER1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BUP_S_RELX_CHECK_EXTERNAL-PARTNER1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BUP_S_RELX_CHECK_EXTERNAL-PARTNER1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARTNER2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BUP_S_RELX_CHECK_EXTERNAL-PARTNER2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BUP_S_RELX_CHECK_EXTERNAL-PARTNER2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field SMTP_ADDRESS
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_BUP_S_RELX_CHECK_EXTERNAL-SMTP_ADDRESS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BUP_S_RELX_CHECK_EXTERNAL-SMTP_ADDRESS.
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_BUP_S_RELX_CHECK_EXTERNAL_STR, 
CLIENT TYPE STRING,
RELNR TYPE STRING,
PARTNER1 TYPE STRING,
PARTNER2 TYPE STRING,
DATE_TO TYPE STRING,
DATE_FROM TYPE STRING,
RELTYP TYPE STRING,
XRF TYPE STRING,
DFTVAL TYPE STRING,
RLTYP TYPE STRING,
RELKIND TYPE STRING,
CRUSR TYPE STRING,
CRDAT TYPE STRING,
CRTIM TYPE STRING,
CHUSR TYPE STRING,
CHDAT TYPE STRING,
CHTIM TYPE STRING,
XDFREL TYPE STRING,
XDFREL2 TYPE STRING,
DB_KEY TYPE STRING,
DB_KEY_TD TYPE STRING,
RELDIR TYPE STRING,
FNCTN TYPE STRING,
PAFKT TYPE STRING,
DPRTMNT TYPE STRING,
ABTNR TYPE STRING,
PAAUTH TYPE STRING,
PAVIP TYPE STRING,
PAREM TYPE STRING,
TEL_NUMBER TYPE STRING,
TEL_EXTENS TYPE STRING,
FAX_NUMBER TYPE STRING,
FAX_EXTENS TYPE STRING,
SMTP_ADDRESS TYPE STRING,
REL_PER TYPE STRING,
REL_AMO TYPE STRING,
REL_CUR TYPE STRING,
CALL_RULEID TYPE STRING,
VISIT_RULEID TYPE STRING,
CALL_GUID TYPE STRING,
VISIT_GUID TYPE STRING,
BP_EEW_BUT051 TYPE STRING,
BP_EEW_BUT051_SP TYPE STRING,
PARTNER_SWAPPED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BUP_S_RELX_CHECK_EXTERNAL_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_BUP_S_RELX_CHECK_EXTERNAL_STR-CLIENT sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-RELNR sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-PARTNER1 sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-PARTNER2 sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-DATE_TO sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-DATE_FROM sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-RELTYP sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-XRF sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-DFTVAL sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-RLTYP sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-RELKIND sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-CRUSR sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-CRDAT sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-CRTIM sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-CHUSR sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-CHDAT sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-CHTIM sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-XDFREL sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-XDFREL2 sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-DB_KEY sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-DB_KEY_TD sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-RELDIR sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-FNCTN sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-PAFKT sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-DPRTMNT sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-ABTNR sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-PAAUTH sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-PAVIP sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-PAREM sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-TEL_NUMBER sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-TEL_EXTENS sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-FAX_NUMBER sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-FAX_EXTENS sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-SMTP_ADDRESS sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-REL_PER sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-REL_AMO sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-REL_CUR sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-CALL_RULEID sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-VISIT_RULEID sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-CALL_GUID sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-VISIT_GUID sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-BP_EEW_BUT051 sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-BP_EEW_BUT051_SP sy-vline 
WA_BUP_S_RELX_CHECK_EXTERNAL_STR-PARTNER_SWAPPED sy-vline      INTO ld_text SEPARATED BY SPACE.

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