Classifier should by default exclude system tables from the scan. Each DB platform has well defined system tables where users / apps don't touch. In a large environment where you have tens and thousands of DBs to scan, if the classifier automatically excludes the system tables for that DB platform, this can significantly reduce the Classifier runtime. In the Data Source definition, the DB platform is identified and that can be used to automatically exclude platform specific system tables or an option can be given to the user to exclude the well defined and known system tables.
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