Scenario: A DBA is optimizing database performance in DB2 and considers using user-defined functions. How can UDFs contribute to performance tuning efforts?
- User-defined functions can execute complex operations directly within SQL queries, reducing the need for multiple queries.
- User-defined functions can execute only simple calculations, limiting their impact on performance tuning efforts.
- User-defined functions can leverage DB2's query optimizer, leading to efficient execution plans.
- User-defined functions can only be called from application code, bypassing the query optimization process.
User-defined functions in DB2 can contribute significantly to performance tuning efforts by leveraging the query optimizer. When properly designed and utilized, UDFs can enable the optimizer to generate efficient execution plans, leading to improved query performance. This allows DBAs to streamline database operations and enhance overall system performance.
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