I need to know "what is the maximum number of UDFs that could be added to a system table ?"
Its urgent ...
What database platform are you using? There is a limitation in SQL 2000 that restricts the overall size of any table row to approx 8K bytes. So if you are using SQL 2000 then any SBO system table, including UDFs, cannot exceed this limit. SQL 2005 does offer some options to get around this restriction (ie the nvarchar(max) datatype).