ABAP Select data from SAP table CNLSAFTVATC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNLSAFTVATC
*  INTO TABLE @DATA(IT_CNLSAFTVATC2).
*--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_CNLSAFTVATC INDEX 1 INTO DATA(WA_CNLSAFTVATC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNLSAFTVATC>-MANDT = 1.
<CNLSAFTVATC>-COMPANYCODE = 1.
<CNLSAFTVATC>-TAXITEMCLASSIFICATION = 1.
<CNLSAFTVATC>-TAXCODE = 1.
<CNLSAFTVATC>-COUNTRY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNLSAFTVATC-CHARTOFACCOUNTS, sy-vline,
  WA_CNLSAFTVATC-TAXCALCULATIONPROCEDURE, sy-vline,
  WA_CNLSAFTVATC-PAYABLEVATACCOUNT, sy-vline,
  WA_CNLSAFTVATC-RECEIVABLEVATACCOUNT, sy-vline,
  WA_CNLSAFTVATC-TAXCODENAME, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_CNLSAFTVATC 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_CNLSAFTVATC 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_CNLSAFTVATC INTO WA_CNLSAFTVATC.


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

*Conversion exit ALPHA, internal->external for field RECEIVABLEVATACCOUNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNLSAFTVATC-RECEIVABLEVATACCOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNLSAFTVATC-RECEIVABLEVATACCOUNT.
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_CNLSAFTVATC_STR, 
MANDT TYPE STRING,
COMPANYCODE TYPE STRING,
TAXITEMCLASSIFICATION TYPE STRING,
TAXCODE TYPE STRING,
COUNTRY TYPE STRING,
CHARTOFACCOUNTS TYPE STRING,
TAXCALCULATIONPROCEDURE TYPE STRING,
PAYABLEVATACCOUNT TYPE STRING,
RECEIVABLEVATACCOUNT TYPE STRING,
TAXCODENAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNLSAFTVATC_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_CNLSAFTVATC_STR-MANDT sy-vline 
WA_CNLSAFTVATC_STR-COMPANYCODE sy-vline 
WA_CNLSAFTVATC_STR-TAXITEMCLASSIFICATION sy-vline 
WA_CNLSAFTVATC_STR-TAXCODE sy-vline 
WA_CNLSAFTVATC_STR-COUNTRY sy-vline 
WA_CNLSAFTVATC_STR-CHARTOFACCOUNTS sy-vline 
WA_CNLSAFTVATC_STR-TAXCALCULATIONPROCEDURE sy-vline 
WA_CNLSAFTVATC_STR-PAYABLEVATACCOUNT sy-vline 
WA_CNLSAFTVATC_STR-RECEIVABLEVATACCOUNT sy-vline 
WA_CNLSAFTVATC_STR-TAXCODENAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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