Table Value Conversion Type 
Table Value Conversion Type
Use
The Table Value conversion type operates in a similar way to the Constant conversion type where the Interface Toolbox replaces the old value of the field object with a new value during the export process. However it differs from the constant conversion type because the new value contained in a field, for example, TITEL for title, comes from a
database table, for example, T535N for name supplements. The new value is a value stored in the SAP System and is not determined by a constant.
To use the table value conversion type, you need to know the table names of the required database tables (for example, table T535N for name supplements) and fields (for example, the TITEL field for title).
Key Fields for the Table Value Conversion Type
The content of the key fields defines the access path for the selected field, whose content is to be used as the replacement.
If you enter the name of the database table and field name and choose Enter, then the Toolbox automatically enters the default values from the SAP System in the key fields for this table.
The access path for the key fields is a default value in the SAP System. Check and, if necessary, correct this access path so that the correct field object can be used for the table value conversion.
In addition, the SAP System allows you to use system fields that are available in the System Fields in ABAP Programs (SYST) table. These are the fields that begin with SY-, for example, SY-LANGU for the language key in the SAP logon procedure, and SY-DATUM for the current date in the system: You can use these system fields to define the access path to a field object.