ABAP Select data from SAP table ISAFTBILCUST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISAFTBILCUST
*  INTO TABLE @DATA(IT_ISAFTBILCUST2).
*--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_ISAFTBILCUST INDEX 1 INTO DATA(WA_ISAFTBILCUST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISAFTBILCUST>-MANDT = 1.
<ISAFTBILCUST>-BILLINGDOCUMENT = 1.
<ISAFTBILCUST>-COMPANYCODE = 1.
<ISAFTBILCUST>-FISCALYEAR = 1.
<ISAFTBILCUST>-DOCUMENTDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISAFTBILCUST-CUSTOMER, sy-vline,
  WA_ISAFTBILCUST-RECONCILIATIONACCOUNT, sy-vline,
  WA_ISAFTBILCUST-PARTNERFIRSTNAME, sy-vline,
  WA_ISAFTBILCUST-PARTNERLASTNAME, sy-vline,
  WA_ISAFTBILCUST-ADDRESSID, sy-vline,
  WA_ISAFTBILCUST-VATREGISTRATIONCOUNTRY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISAFTBILCUST 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_ISAFTBILCUST 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_ISAFTBILCUST INTO WA_ISAFTBILCUST.


*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_ISAFTBILCUST-BILLINGDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISAFTBILCUST-BILLINGDOCUMENT.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field ADDRESSID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISAFTBILCUST-ADDRESSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISAFTBILCUST-ADDRESSID.
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_ISAFTBILCUST_STR, 
MANDT TYPE STRING,
BILLINGDOCUMENT TYPE STRING,
COMPANYCODE TYPE STRING,
FISCALYEAR TYPE STRING,
DOCUMENTDATE TYPE STRING,
CUSTOMER TYPE STRING,
RECONCILIATIONACCOUNT TYPE STRING,
PARTNERFIRSTNAME TYPE STRING,
PARTNERLASTNAME TYPE STRING,
ADDRESSID TYPE STRING,
VATREGISTRATIONCOUNTRY TYPE STRING,
VATREGISTRATION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISAFTBILCUST_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_ISAFTBILCUST_STR-MANDT sy-vline 
WA_ISAFTBILCUST_STR-BILLINGDOCUMENT sy-vline 
WA_ISAFTBILCUST_STR-COMPANYCODE sy-vline 
WA_ISAFTBILCUST_STR-FISCALYEAR sy-vline 
WA_ISAFTBILCUST_STR-DOCUMENTDATE sy-vline 
WA_ISAFTBILCUST_STR-CUSTOMER sy-vline 
WA_ISAFTBILCUST_STR-RECONCILIATIONACCOUNT sy-vline 
WA_ISAFTBILCUST_STR-PARTNERFIRSTNAME sy-vline 
WA_ISAFTBILCUST_STR-PARTNERLASTNAME sy-vline 
WA_ISAFTBILCUST_STR-ADDRESSID sy-vline 
WA_ISAFTBILCUST_STR-VATREGISTRATIONCOUNTRY sy-vline 
WA_ISAFTBILCUST_STR-VATREGISTRATION sy-vline      INTO ld_text SEPARATED BY SPACE.

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