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troubleshooting Question

cast(cast(getdate() as int) as smalldatetime) in WHERE clause. Executed ONCE or EVERY ROW?

Avatar of ZuZuPetals
ZuZuPetalsFlag for United States of America asked on
Microsoft SQL Server
10 Comments1 Solution999 ViewsLast Modified:
See code below.  Does SQL Server optimize the right-hand-side formula of the expression to only evaluate it once?  Or does it needlessly execute it for every single row?  The RHS is essentially a constant in this case and won't change on a per-row basis.

Sounds like in these situations it's better to store the value in a @variable ahead of time then just reference the @variable in the WHERE clause.
select MyColumn from MyTable where SomeColumn < cast(cast(getdate() as int) as smalldatetime)
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