ABAP Select data from SAP table EXT_RECON_HDR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EXT_RECON_HDR
*  INTO TABLE @DATA(IT_EXT_RECON_HDR2).
*--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_EXT_RECON_HDR INDEX 1 INTO DATA(WA_EXT_RECON_HDR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EXT_RECON_HDR>-MANDT = 1.
<EXT_RECON_HDR>-BUKRS = 1.
<EXT_RECON_HDR>-BELNR = 1.
<EXT_RECON_HDR>-GJAHR = 1.
<EXT_RECON_HDR>-ODN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EXT_RECON_HDR-BUPLA, sy-vline,
  WA_EXT_RECON_HDR-BPTAXID, sy-vline,
  WA_EXT_RECON_HDR-INVOICE_DATE, sy-vline,
  WA_EXT_RECON_HDR-BUDAT, sy-vline,
  WA_EXT_RECON_HDR-VATDATE, sy-vline,
  WA_EXT_RECON_HDR-INVOICE_VALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EXT_RECON_HDR 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_EXT_RECON_HDR 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_EXT_RECON_HDR INTO WA_EXT_RECON_HDR.


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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_EXT_RECON_HDR-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EXT_RECON_HDR-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field INVOICE_VALUE
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_EXT_RECON_HDR-INVOICE_VALUE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EXT_RECON_HDR-INVOICE_VALUE.
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_EXT_RECON_HDR_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
ODN TYPE STRING,
BUPLA TYPE STRING,
BPTAXID TYPE STRING,
INVOICE_DATE TYPE STRING,
BUDAT TYPE STRING,
VATDATE TYPE STRING,
INVOICE_VALUE TYPE STRING,
GENERATED_STATUS TYPE STRING,
USER_STATUS TYPE STRING,
REASON TYPE STRING,
CREATEDBY TYPE STRING,
CREATION_TIMESTAMPLONG TYPE STRING,
UPDATEDBY TYPE STRING,
UPDATE_TIMESTAMPLONG TYPE STRING,
EXECID TYPE STRING,
GST_SECTION TYPE STRING,
CTIN TYPE STRING,
DOCTYP TYPE STRING,
DIFFPRCNT TYPE STRING,
SEC7ACT TYPE STRING,
RFNDELG TYPE STRING,
ACTION TYPE STRING,
CFS TYPE STRING,
POS TYPE STRING,
CLMRFND TYPE STRING,
ITCENT TYPE STRING,
ITCENTEDTBL TYPE STRING,
UPLDDT TYPE STRING,
CHKSUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EXT_RECON_HDR_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_EXT_RECON_HDR_STR-MANDT sy-vline 
WA_EXT_RECON_HDR_STR-BUKRS sy-vline 
WA_EXT_RECON_HDR_STR-BELNR sy-vline 
WA_EXT_RECON_HDR_STR-GJAHR sy-vline 
WA_EXT_RECON_HDR_STR-ODN sy-vline 
WA_EXT_RECON_HDR_STR-BUPLA sy-vline 
WA_EXT_RECON_HDR_STR-BPTAXID sy-vline 
WA_EXT_RECON_HDR_STR-INVOICE_DATE sy-vline 
WA_EXT_RECON_HDR_STR-BUDAT sy-vline 
WA_EXT_RECON_HDR_STR-VATDATE sy-vline 
WA_EXT_RECON_HDR_STR-INVOICE_VALUE sy-vline 
WA_EXT_RECON_HDR_STR-GENERATED_STATUS sy-vline 
WA_EXT_RECON_HDR_STR-USER_STATUS sy-vline 
WA_EXT_RECON_HDR_STR-REASON sy-vline 
WA_EXT_RECON_HDR_STR-CREATEDBY sy-vline 
WA_EXT_RECON_HDR_STR-CREATION_TIMESTAMPLONG sy-vline 
WA_EXT_RECON_HDR_STR-UPDATEDBY sy-vline 
WA_EXT_RECON_HDR_STR-UPDATE_TIMESTAMPLONG sy-vline 
WA_EXT_RECON_HDR_STR-EXECID sy-vline 
WA_EXT_RECON_HDR_STR-GST_SECTION sy-vline 
WA_EXT_RECON_HDR_STR-CTIN sy-vline 
WA_EXT_RECON_HDR_STR-DOCTYP sy-vline 
WA_EXT_RECON_HDR_STR-DIFFPRCNT sy-vline 
WA_EXT_RECON_HDR_STR-SEC7ACT sy-vline 
WA_EXT_RECON_HDR_STR-RFNDELG sy-vline 
WA_EXT_RECON_HDR_STR-ACTION sy-vline 
WA_EXT_RECON_HDR_STR-CFS sy-vline 
WA_EXT_RECON_HDR_STR-POS sy-vline 
WA_EXT_RECON_HDR_STR-CLMRFND sy-vline 
WA_EXT_RECON_HDR_STR-ITCENT sy-vline 
WA_EXT_RECON_HDR_STR-ITCENTEDTBL sy-vline 
WA_EXT_RECON_HDR_STR-UPLDDT sy-vline 
WA_EXT_RECON_HDR_STR-CHKSUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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