SQL Server Team-based Development - Red Gate Software

Chapter 6: Reusing T-SQL Code
Unfortunately, performance considerations may prevent us from reusing our code to
the fullest. Yet, with careful benchmarking, we can usually find a nice compromise and
develop code that is easy to maintain but still performs well enough.
Specifically, I hope the chapter has taught you the following lessons in code reuse:
• views are useful for simple reuse of non-parameterized queries
• for reuse of parameterized queries, inline UDFs are often preferable to
stored procedures
• be wary of performance issues with scalar and multi-statement table-valued UDFs
• if possible, enforce reusable business logic in a simple constraint, or possibly a filtered
index in SQL 2008 and upwards
• for more complex logic, triggers often offer the most convenient means of promoting
reuse, but they require extensive testing.
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