SQL function as default parameter value?

Question

I tried changing a default parameter value with this:

ALTER PROCEDURE [dbo].[my_sp]
@currentDate datetime = GETDATE()

and all the SQL pre-c

Answer 1

I infer you're using Microsoft SQL Server from the square brackets in your example.

From MSDN:

Only a constant value, such as a character string; a scalar function (either a system, user-defined, or CLR function); or NULL can be used as a default.

The function GETDATE() returns a different value from time to time, so it is not a constant expression.