ABAP Select data from SAP table ISX_INV_HEADER_DATA_IL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISX_INV_HEADER_DATA_IL
*  INTO TABLE @DATA(IT_ISX_INV_HEADER_DATA_IL2).
*--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_ISX_INV_HEADER_DATA_IL INDEX 1 INTO DATA(WA_ISX_INV_HEADER_DATA_IL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISX_INV_HEADER_DATA_IL>-APPLK = 1.
<ISX_INV_HEADER_DATA_IL>-INV_PROCESS = 1.
<ISX_INV_HEADER_DATA_IL>-INV_TYPE = 1.
<ISX_INV_HEADER_DATA_IL>-INV_CATEGORY = 1.
<ISX_INV_HEADER_DATA_IL>-GPART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISX_INV_HEADER_DATA_IL-VKONT, sy-vline,
  WA_ISX_INV_HEADER_DATA_IL-MDCAT, sy-vline,
  WA_ISX_INV_HEADER_DATA_IL-ABWVK, sy-vline,
  WA_ISX_INV_HEADER_DATA_IL-ABWBL, sy-vline,
  WA_ISX_INV_HEADER_DATA_IL-CRNAME, sy-vline,
  WA_ISX_INV_HEADER_DATA_IL-CRDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISX_INV_HEADER_DATA_IL 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_ISX_INV_HEADER_DATA_IL 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_ISX_INV_HEADER_DATA_IL INTO WA_ISX_INV_HEADER_DATA_IL.


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

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISX_INV_HEADER_DATA_IL-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISX_INV_HEADER_DATA_IL-VKONT.
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_ISX_INV_HEADER_DATA_IL_STR, 
APPLK TYPE STRING,
INV_PROCESS TYPE STRING,
INV_TYPE TYPE STRING,
INV_CATEGORY TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
MDCAT TYPE STRING,
ABWVK TYPE STRING,
ABWBL TYPE STRING,
CRNAME TYPE STRING,
CRDATE TYPE STRING,
CRTIME TYPE STRING,
CRMODE TYPE STRING,
FIKEY TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
FAEDN TYPE STRING,
FAEDS TYPE STRING,
SKTPZ TYPE STRING,
TOTAL_CURR TYPE STRING,
TOTAL_AMT TYPE STRING,
INVOICED TYPE STRING,
SIMULATED TYPE STRING,
REVREASON TYPE STRING,
REVERSALDOC TYPE STRING,
REVERSEDDOC TYPE STRING,
PRINTDATE TYPE STRING,
PRINTLOCK TYPE STRING,
PYMET TYPE STRING,
NRZAS TYPE STRING,
ZLSCH TYPE STRING,
DOCTYPE TYPE STRING,
EXKID TYPE STRING,
EXBEL TYPE STRING,
INVPERCAT TYPE STRING,
INVPERIOD TYPE STRING,
INVPERIOD_FROM TYPE STRING,
CHGDOC_EX TYPE STRING,
BOLLOTAX TYPE STRING,
XSUBINV TYPE STRING,
INV_DOC_TITLE TYPE STRING,
ARCHIVED TYPE STRING,
XREVERSED TYPE STRING,
REVREASON_TXT TYPE STRING,
PYMET_TXT TYPE STRING,
CRM_TOTAL_AMOUNT TYPE STRING,
CRM_NET_AMOUNT TYPE STRING,
CRM_TAX_AMOUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISX_INV_HEADER_DATA_IL_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_ISX_INV_HEADER_DATA_IL_STR-APPLK sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-INV_PROCESS sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-INV_TYPE sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-INV_CATEGORY sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-GPART sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-VKONT sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-MDCAT sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-ABWVK sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-ABWBL sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-CRNAME sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-CRDATE sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-CRTIME sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-CRMODE sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-FIKEY sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-BUDAT sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-BLDAT sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-FAEDN sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-FAEDS sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-SKTPZ sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-TOTAL_CURR sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-TOTAL_AMT sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-INVOICED sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-SIMULATED sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-REVREASON sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-REVERSALDOC sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-REVERSEDDOC sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-PRINTDATE sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-PRINTLOCK sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-PYMET sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-NRZAS sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-ZLSCH sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-DOCTYPE sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-EXKID sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-EXBEL sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-INVPERCAT sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-INVPERIOD sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-INVPERIOD_FROM sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-CHGDOC_EX sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-BOLLOTAX sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-XSUBINV sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-INV_DOC_TITLE sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-ARCHIVED sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-XREVERSED sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-REVREASON_TXT sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-PYMET_TXT sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-CRM_TOTAL_AMOUNT sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-CRM_NET_AMOUNT sy-vline 
WA_ISX_INV_HEADER_DATA_IL_STR-CRM_TAX_AMOUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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