ABAP Select data from SAP table EIV_GTD_HDR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP EIV_GTD_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 EIV_GTD_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 EIV_GTD_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_EIV_GTD_HDR TYPE STANDARD TABLE OF EIV_GTD_HDR,
      WA_EIV_GTD_HDR TYPE EIV_GTD_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: <EIV_GTD_HDR> TYPE EIV_GTD_HDR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EIV_GTD_HDR
*  INTO TABLE @DATA(IT_EIV_GTD_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_EIV_GTD_HDR INDEX 1 INTO DATA(WA_EIV_GTD_HDR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EIV_GTD_HDR>-MANDT = 1.
<EIV_GTD_HDR>-GTD_HEADER_UUID = 1.
<EIV_GTD_HDR>-GTD_NMBR = 1.
<EIV_GTD_HDR>-GTD_STATUS = 1.
<EIV_GTD_HDR>-INVC_CAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EIV_GTD_HDR-INVC_TYPE, sy-vline,
  WA_EIV_GTD_HDR-POS_GTVBELN, sy-vline,
  WA_EIV_GTD_HDR-POS_TYPCODE, sy-vline,
  WA_EIV_GTD_HDR-IS_CANCEL_IND, sy-vline,
  WA_EIV_GTD_HDR-IS_GOODS_LIST, sy-vline,
  WA_EIV_GTD_HDR-NET_VALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EIV_GTD_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_EIV_GTD_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_EIV_GTD_HDR INTO WA_EIV_GTD_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 INVC_TYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EIV_GTD_HDR-INVC_TYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EIV_GTD_HDR-INVC_TYPE.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit EXCRT, internal->external for field EXCH_RATE
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_EIV_GTD_HDR-EXCH_RATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EIV_GTD_HDR-EXCH_RATE.
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_EIV_GTD_HDR_STR, 
MANDT TYPE STRING,
GTD_HEADER_UUID TYPE STRING,
GTD_NMBR TYPE STRING,
GTD_STATUS TYPE STRING,
INVC_CAT TYPE STRING,
INVC_TYPE TYPE STRING,
POS_GTVBELN TYPE STRING,
POS_TYPCODE TYPE STRING,
IS_CANCEL_IND TYPE STRING,
IS_GOODS_LIST TYPE STRING,
NET_VALUE TYPE STRING,
TAX_AMOUNT TYPE STRING,
DISC_AMOUNT TYPE STRING,
DISC_TAX_AMOUNT TYPE STRING,
CURRENCY TYPE STRING,
TAX_RATE TYPE STRING,
BUYER_NMBR TYPE STRING,
BUYER_NAME TYPE STRING,
BUYER_TAX_REG_NMBR TYPE STRING,
BUYER_ADDR_TEL TYPE STRING,
BUYER_BANK TYPE STRING,
BUYER_BUSTYP TYPE STRING,
BUYER_PHONE TYPE STRING,
BUYER_MOBILE TYPE STRING,
BUYER_PROVINCE TYPE STRING,
BUYER_EMAIL TYPE STRING,
REF_GTD_NMBR TYPE STRING,
SELLER_NAME TYPE STRING,
SELLER_BANK TYPE STRING,
SELLER_ADDR_TEL TYPE STRING,
SELLER_PHONE TYPE STRING,
NOTE TYPE STRING,
NOTE2 TYPE STRING,
RED_NOTE_NMBR TYPE STRING,
RED_NOTE_IND TYPE STRING,
ISSUER TYPE STRING,
REVIEWER TYPE STRING,
RECEIVER TYPE STRING,
SEND_TYPE TYPE STRING,
DOC_DATE TYPE STRING,
DOC_TIME TYPE STRING,
SENT_DATE TYPE STRING,
PRINT_TIMES TYPE STRING,
LAST_PRINT_DATE TYPE STRING,
EXCH_RATE TYPE STRING,
FRGN_AMOUNT TYPE STRING,
FRGN_CRCY TYPE STRING,
CREATE_USER TYPE STRING,
CREATE_TIME TYPE STRING,
CHANGE_USER TYPE STRING,
CHANGE_TIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EIV_GTD_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_EIV_GTD_HDR_STR-MANDT sy-vline 
WA_EIV_GTD_HDR_STR-GTD_HEADER_UUID sy-vline 
WA_EIV_GTD_HDR_STR-GTD_NMBR sy-vline 
WA_EIV_GTD_HDR_STR-GTD_STATUS sy-vline 
WA_EIV_GTD_HDR_STR-INVC_CAT sy-vline 
WA_EIV_GTD_HDR_STR-INVC_TYPE sy-vline 
WA_EIV_GTD_HDR_STR-POS_GTVBELN sy-vline 
WA_EIV_GTD_HDR_STR-POS_TYPCODE sy-vline 
WA_EIV_GTD_HDR_STR-IS_CANCEL_IND sy-vline 
WA_EIV_GTD_HDR_STR-IS_GOODS_LIST sy-vline 
WA_EIV_GTD_HDR_STR-NET_VALUE sy-vline 
WA_EIV_GTD_HDR_STR-TAX_AMOUNT sy-vline 
WA_EIV_GTD_HDR_STR-DISC_AMOUNT sy-vline 
WA_EIV_GTD_HDR_STR-DISC_TAX_AMOUNT sy-vline 
WA_EIV_GTD_HDR_STR-CURRENCY sy-vline 
WA_EIV_GTD_HDR_STR-TAX_RATE sy-vline 
WA_EIV_GTD_HDR_STR-BUYER_NMBR sy-vline 
WA_EIV_GTD_HDR_STR-BUYER_NAME sy-vline 
WA_EIV_GTD_HDR_STR-BUYER_TAX_REG_NMBR sy-vline 
WA_EIV_GTD_HDR_STR-BUYER_ADDR_TEL sy-vline 
WA_EIV_GTD_HDR_STR-BUYER_BANK sy-vline 
WA_EIV_GTD_HDR_STR-BUYER_BUSTYP sy-vline 
WA_EIV_GTD_HDR_STR-BUYER_PHONE sy-vline 
WA_EIV_GTD_HDR_STR-BUYER_MOBILE sy-vline 
WA_EIV_GTD_HDR_STR-BUYER_PROVINCE sy-vline 
WA_EIV_GTD_HDR_STR-BUYER_EMAIL sy-vline 
WA_EIV_GTD_HDR_STR-REF_GTD_NMBR sy-vline 
WA_EIV_GTD_HDR_STR-SELLER_NAME sy-vline 
WA_EIV_GTD_HDR_STR-SELLER_BANK sy-vline 
WA_EIV_GTD_HDR_STR-SELLER_ADDR_TEL sy-vline 
WA_EIV_GTD_HDR_STR-SELLER_PHONE sy-vline 
WA_EIV_GTD_HDR_STR-NOTE sy-vline 
WA_EIV_GTD_HDR_STR-NOTE2 sy-vline 
WA_EIV_GTD_HDR_STR-RED_NOTE_NMBR sy-vline 
WA_EIV_GTD_HDR_STR-RED_NOTE_IND sy-vline 
WA_EIV_GTD_HDR_STR-ISSUER sy-vline 
WA_EIV_GTD_HDR_STR-REVIEWER sy-vline 
WA_EIV_GTD_HDR_STR-RECEIVER sy-vline 
WA_EIV_GTD_HDR_STR-SEND_TYPE sy-vline 
WA_EIV_GTD_HDR_STR-DOC_DATE sy-vline 
WA_EIV_GTD_HDR_STR-DOC_TIME sy-vline 
WA_EIV_GTD_HDR_STR-SENT_DATE sy-vline 
WA_EIV_GTD_HDR_STR-PRINT_TIMES sy-vline 
WA_EIV_GTD_HDR_STR-LAST_PRINT_DATE sy-vline 
WA_EIV_GTD_HDR_STR-EXCH_RATE sy-vline 
WA_EIV_GTD_HDR_STR-FRGN_AMOUNT sy-vline 
WA_EIV_GTD_HDR_STR-FRGN_CRCY sy-vline 
WA_EIV_GTD_HDR_STR-CREATE_USER sy-vline 
WA_EIV_GTD_HDR_STR-CREATE_TIME sy-vline 
WA_EIV_GTD_HDR_STR-CHANGE_USER sy-vline 
WA_EIV_GTD_HDR_STR-CHANGE_TIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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