ABAP Select data from SAP table ISAFTBILLITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISAFTBILLITEM
*  INTO TABLE @DATA(IT_ISAFTBILLITEM2).
*--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_ISAFTBILLITEM INDEX 1 INTO DATA(WA_ISAFTBILLITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISAFTBILLITEM>-MANDT = 1.
<ISAFTBILLITEM>-BILLINGDOCUMENT = 1.
<ISAFTBILLITEM>-BILLINGDOCUMENTITEM = 1.
<ISAFTBILLITEM>-COMPANYCODE = 1.
<ISAFTBILLITEM>-MATERIAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISAFTBILLITEM-QUANTITY, sy-vline,
  WA_ISAFTBILLITEM-UNITOFMEASURE, sy-vline,
  WA_ISAFTBILLITEM-TRANSACTIONCURRENCY, sy-vline,
  WA_ISAFTBILLITEM-NETPRICEAMOUNT, sy-vline,
  WA_ISAFTBILLITEM-BILLINGDOCUMENTITEMTEXT, sy-vline,
  WA_ISAFTBILLITEM-NETAMOUNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISAFTBILLITEM 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_ISAFTBILLITEM 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_ISAFTBILLITEM INTO WA_ISAFTBILLITEM.


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

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ISAFTBILLITEM-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISAFTBILLITEM-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNITOFMEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ISAFTBILLITEM-UNITOFMEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISAFTBILLITEM-UNITOFMEASURE.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit GJAHR, internal->external for field FISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ISAFTBILLITEM-FISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISAFTBILLITEM-FISCALYEAR.
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_ISAFTBILLITEM_STR, 
MANDT TYPE STRING,
BILLINGDOCUMENT TYPE STRING,
BILLINGDOCUMENTITEM TYPE STRING,
COMPANYCODE TYPE STRING,
MATERIAL TYPE STRING,
QUANTITY TYPE STRING,
UNITOFMEASURE TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
NETPRICEAMOUNT TYPE STRING,
BILLINGDOCUMENTITEMTEXT TYPE STRING,
NETAMOUNT TYPE STRING,
EXCHANGERATE TYPE STRING,
EXCHANGERATEDATE TYPE STRING,
SDDOCUMENTREASON TYPE STRING,
SALESDOCUMENT TYPE STRING,
SALESDOCUMENTITEM TYPE STRING,
REFERENCESDDOCUMENTCATEGORY TYPE STRING,
REFERENCESDDOCUMENT TYPE STRING,
REFERENCESDDOCUMENTITEM TYPE STRING,
CONTROLLINGAREA TYPE STRING,
COSTCENTER TYPE STRING,
CREATIONDATE TYPE STRING,
BILLINGPLANRULE TYPE STRING,
FISCALYEAR TYPE STRING,
CONDITIONISDELETED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISAFTBILLITEM_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_ISAFTBILLITEM_STR-MANDT sy-vline 
WA_ISAFTBILLITEM_STR-BILLINGDOCUMENT sy-vline 
WA_ISAFTBILLITEM_STR-BILLINGDOCUMENTITEM sy-vline 
WA_ISAFTBILLITEM_STR-COMPANYCODE sy-vline 
WA_ISAFTBILLITEM_STR-MATERIAL sy-vline 
WA_ISAFTBILLITEM_STR-QUANTITY sy-vline 
WA_ISAFTBILLITEM_STR-UNITOFMEASURE sy-vline 
WA_ISAFTBILLITEM_STR-TRANSACTIONCURRENCY sy-vline 
WA_ISAFTBILLITEM_STR-NETPRICEAMOUNT sy-vline 
WA_ISAFTBILLITEM_STR-BILLINGDOCUMENTITEMTEXT sy-vline 
WA_ISAFTBILLITEM_STR-NETAMOUNT sy-vline 
WA_ISAFTBILLITEM_STR-EXCHANGERATE sy-vline 
WA_ISAFTBILLITEM_STR-EXCHANGERATEDATE sy-vline 
WA_ISAFTBILLITEM_STR-SDDOCUMENTREASON sy-vline 
WA_ISAFTBILLITEM_STR-SALESDOCUMENT sy-vline 
WA_ISAFTBILLITEM_STR-SALESDOCUMENTITEM sy-vline 
WA_ISAFTBILLITEM_STR-REFERENCESDDOCUMENTCATEGORY sy-vline 
WA_ISAFTBILLITEM_STR-REFERENCESDDOCUMENT sy-vline 
WA_ISAFTBILLITEM_STR-REFERENCESDDOCUMENTITEM sy-vline 
WA_ISAFTBILLITEM_STR-CONTROLLINGAREA sy-vline 
WA_ISAFTBILLITEM_STR-COSTCENTER sy-vline 
WA_ISAFTBILLITEM_STR-CREATIONDATE sy-vline 
WA_ISAFTBILLITEM_STR-BILLINGPLANRULE sy-vline 
WA_ISAFTBILLITEM_STR-FISCALYEAR sy-vline 
WA_ISAFTBILLITEM_STR-CONDITIONISDELETED sy-vline      INTO ld_text SEPARATED BY SPACE.

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