CommandType.StoredProcedure or CommandType.Text: Which is Better for Stored Procedure Execution in C#?

CommandType.StoredProcedure vs CommandType.Text in Stored Procedure Execution

Executing stored procedures in C# with CommandType.StoredProcedure prompts the question: is this necessary? Does it provide any benefits over using CommandType.Text? This article investigates the advantages of both methods.

Default Parameterization

According to a blog study, SQL Server automatically parameterizes statements in sp_executesql when CommandType.Text is used. In contrast, CommandType.StoredProcedure explicitly parameterizes procedures, lightening the database's workload, and thus enhancing performance.

Testing and Results

Using SQL Server Profiler, we tested stored procedures called with both CommandType variations. In both cases, RPC calls were generated.

CommandType.Text

exec sp_executesql N'dbo.Test',N'@Text1 nvarchar(5),@Text2 nvarchar(5)',@Text1=N'Text1',@Text2=N'Text2'

• The text call is enclosed in a sp_executesql call.
• Parameters are declared but not used in the call.

CommandType.StoredProcedure

exec dbo.Test @Text1=N'Text1',@Text2=N'Text2'

• No additional wrapping or parameter declaration occurs.

Conclusion

• CommandType.StoredProcedure is marginally faster due to explicit parameterization.
• With CommandType.Text, any character parameter names must be included in the call, except for parameters with default values.

Therefore, to gain the best performance and parameter flexibility, use CommandType.StoredProcedure when executing stored procedures in C#.

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