ABAP Select data from SAP table /XFT/INV_S_HEAD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /XFT/INV_S_HEAD 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 /XFT/INV_S_HEAD. 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 /XFT/INV_S_HEAD 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_/XFT/INV_S_HEAD TYPE STANDARD TABLE OF /XFT/INV_S_HEAD,
      WA_/XFT/INV_S_HEAD TYPE /XFT/INV_S_HEAD,
      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: </XFT/INV_S_HEAD> TYPE /XFT/INV_S_HEAD.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /XFT/INV_S_HEAD
  INTO TABLE IT_/XFT/INV_S_HEAD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /XFT/INV_S_HEAD
*  INTO TABLE @DATA(IT_/XFT/INV_S_HEAD2).
*--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_/XFT/INV_S_HEAD INDEX 1 INTO DATA(WA_/XFT/INV_S_HEAD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/XFT/INV_S_HEAD ASSIGNING </XFT/INV_S_HEAD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</XFT/INV_S_HEAD>-INVOICE_IND = 1.
</XFT/INV_S_HEAD>-DOC_TYPE = 1.
</XFT/INV_S_HEAD>-DOC_DATE = 1.
</XFT/INV_S_HEAD>-PSTNG_DATE = 1.
</XFT/INV_S_HEAD>-REF_DOC_NO = 1.

ENDLOOP.

LOOP AT IT_/XFT/INV_S_HEAD INTO WA_/XFT/INV_S_HEAD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/XFT/INV_S_HEAD-COMP_CODE, sy-vline,
  WA_/XFT/INV_S_HEAD-DIFF_INV, sy-vline,
  WA_/XFT/INV_S_HEAD-CURRENCY, sy-vline,
  WA_/XFT/INV_S_HEAD-CURRENCY_ISO, sy-vline,
  WA_/XFT/INV_S_HEAD-GROSS_AMOUNT, sy-vline,
  WA_/XFT/INV_S_HEAD-INV_REC_DATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/XFT/INV_S_HEAD 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_/XFT/INV_S_HEAD 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_/XFT/INV_S_HEAD INTO WA_/XFT/INV_S_HEAD.


*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 DIFF_INV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/XFT/INV_S_HEAD-DIFF_INV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/XFT/INV_S_HEAD-DIFF_INV.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field PAYEE_PAYER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/XFT/INV_S_HEAD-PAYEE_PAYER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/XFT/INV_S_HEAD-PAYEE_PAYER.
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_/XFT/INV_S_HEAD_STR, 
INVOICE_IND TYPE STRING,
DOC_TYPE TYPE STRING,
DOC_DATE TYPE STRING,
PSTNG_DATE TYPE STRING,
REF_DOC_NO TYPE STRING,
COMP_CODE TYPE STRING,
DIFF_INV TYPE STRING,
CURRENCY TYPE STRING,
CURRENCY_ISO TYPE STRING,
GROSS_AMOUNT TYPE STRING,
INV_REC_DATE TYPE STRING,
CALC_TAX_IND TYPE STRING,
BLINE_DATE TYPE STRING,
PMNTTRMS TYPE STRING,
DSCT_DAYS1 TYPE STRING,
DSCT_PCT1 TYPE STRING,
DSCT_DAYS2 TYPE STRING,
DSCT_PCT2 TYPE STRING,
NETTERMS TYPE STRING,
FIXEDTERMS TYPE STRING,
PMNT_BLOCK TYPE STRING,
DSCT_AMOUNT TYPE STRING,
PYMT_METH TYPE STRING,
INV_REF_NO TYPE STRING,
INV_YEAR TYPE STRING,
PARTNER_BK TYPE STRING,
HOUSEBANKID TYPE STRING,
EXCH_RATE TYPE STRING,
EXCH_RATE_V TYPE STRING,
IV_CATEGORY TYPE STRING,
DEL_COSTS TYPE STRING,
DEL_COSTS_TAXC TYPE STRING,
DEL_COSTS_TAXJ TYPE STRING,
PERSON_EXT TYPE STRING,
PMTMTHSUPL TYPE STRING,
SCBANK_IND TYPE STRING,
SUPCOUNTRY TYPE STRING,
BLLSRV_IND TYPE STRING,
REF_DOC_NO_LONG TYPE STRING,
PO_SUB_NO TYPE STRING,
PO_CHECKDG TYPE STRING,
PO_REF_NO TYPE STRING,
PAYEE_PAYER TYPE STRING,
ALLOC_NMBR TYPE STRING,
PAYMT_REF TYPE STRING,
PLANNING_LEVEL TYPE STRING,
PLANNING_DATE TYPE STRING,
BUS_AREA TYPE STRING,
LOT_NUMBER TYPE STRING,
ITEM_TEXT TYPE STRING,
J_1BNFTYPE TYPE STRING,
EU_TRIANG_DEAL TYPE STRING,
REPCOUNTRY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/XFT/INV_S_HEAD_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_/XFT/INV_S_HEAD_STR-INVOICE_IND sy-vline 
WA_/XFT/INV_S_HEAD_STR-DOC_TYPE sy-vline 
WA_/XFT/INV_S_HEAD_STR-DOC_DATE sy-vline 
WA_/XFT/INV_S_HEAD_STR-PSTNG_DATE sy-vline 
WA_/XFT/INV_S_HEAD_STR-REF_DOC_NO sy-vline 
WA_/XFT/INV_S_HEAD_STR-COMP_CODE sy-vline 
WA_/XFT/INV_S_HEAD_STR-DIFF_INV sy-vline 
WA_/XFT/INV_S_HEAD_STR-CURRENCY sy-vline 
WA_/XFT/INV_S_HEAD_STR-CURRENCY_ISO sy-vline 
WA_/XFT/INV_S_HEAD_STR-GROSS_AMOUNT sy-vline 
WA_/XFT/INV_S_HEAD_STR-INV_REC_DATE sy-vline 
WA_/XFT/INV_S_HEAD_STR-CALC_TAX_IND sy-vline 
WA_/XFT/INV_S_HEAD_STR-BLINE_DATE sy-vline 
WA_/XFT/INV_S_HEAD_STR-PMNTTRMS sy-vline 
WA_/XFT/INV_S_HEAD_STR-DSCT_DAYS1 sy-vline 
WA_/XFT/INV_S_HEAD_STR-DSCT_PCT1 sy-vline 
WA_/XFT/INV_S_HEAD_STR-DSCT_DAYS2 sy-vline 
WA_/XFT/INV_S_HEAD_STR-DSCT_PCT2 sy-vline 
WA_/XFT/INV_S_HEAD_STR-NETTERMS sy-vline 
WA_/XFT/INV_S_HEAD_STR-FIXEDTERMS sy-vline 
WA_/XFT/INV_S_HEAD_STR-PMNT_BLOCK sy-vline 
WA_/XFT/INV_S_HEAD_STR-DSCT_AMOUNT sy-vline 
WA_/XFT/INV_S_HEAD_STR-PYMT_METH sy-vline 
WA_/XFT/INV_S_HEAD_STR-INV_REF_NO sy-vline 
WA_/XFT/INV_S_HEAD_STR-INV_YEAR sy-vline 
WA_/XFT/INV_S_HEAD_STR-PARTNER_BK sy-vline 
WA_/XFT/INV_S_HEAD_STR-HOUSEBANKID sy-vline 
WA_/XFT/INV_S_HEAD_STR-EXCH_RATE sy-vline 
WA_/XFT/INV_S_HEAD_STR-EXCH_RATE_V sy-vline 
WA_/XFT/INV_S_HEAD_STR-IV_CATEGORY sy-vline 
WA_/XFT/INV_S_HEAD_STR-DEL_COSTS sy-vline 
WA_/XFT/INV_S_HEAD_STR-DEL_COSTS_TAXC sy-vline 
WA_/XFT/INV_S_HEAD_STR-DEL_COSTS_TAXJ sy-vline 
WA_/XFT/INV_S_HEAD_STR-PERSON_EXT sy-vline 
WA_/XFT/INV_S_HEAD_STR-PMTMTHSUPL sy-vline 
WA_/XFT/INV_S_HEAD_STR-SCBANK_IND sy-vline 
WA_/XFT/INV_S_HEAD_STR-SUPCOUNTRY sy-vline 
WA_/XFT/INV_S_HEAD_STR-BLLSRV_IND sy-vline 
WA_/XFT/INV_S_HEAD_STR-REF_DOC_NO_LONG sy-vline 
WA_/XFT/INV_S_HEAD_STR-PO_SUB_NO sy-vline 
WA_/XFT/INV_S_HEAD_STR-PO_CHECKDG sy-vline 
WA_/XFT/INV_S_HEAD_STR-PO_REF_NO sy-vline 
WA_/XFT/INV_S_HEAD_STR-PAYEE_PAYER sy-vline 
WA_/XFT/INV_S_HEAD_STR-ALLOC_NMBR sy-vline 
WA_/XFT/INV_S_HEAD_STR-PAYMT_REF sy-vline 
WA_/XFT/INV_S_HEAD_STR-PLANNING_LEVEL sy-vline 
WA_/XFT/INV_S_HEAD_STR-PLANNING_DATE sy-vline 
WA_/XFT/INV_S_HEAD_STR-BUS_AREA sy-vline 
WA_/XFT/INV_S_HEAD_STR-LOT_NUMBER sy-vline 
WA_/XFT/INV_S_HEAD_STR-ITEM_TEXT sy-vline 
WA_/XFT/INV_S_HEAD_STR-J_1BNFTYPE sy-vline 
WA_/XFT/INV_S_HEAD_STR-EU_TRIANG_DEAL sy-vline 
WA_/XFT/INV_S_HEAD_STR-REPCOUNTRY sy-vline      INTO ld_text SEPARATED BY SPACE.

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