sql server - Optimize For in CTE or Subquery -

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setup:

i'm experimenting optimize for clause in sql server 2008 r2. i've put following @ end of query.

option (optimize (@usertype= 'm', @date unknown))

issue:

however, i'm getting below error.

the variable "@usertype" specified in optimize clause, not used in query.

this variable used in subquery within query, , used in location.

if try moving optimize for subquery, stored proc not compile. likewise, cannot put subquery in cte , optimize within that; doesn't compile either.

incorrect syntax near keyword 'option'.

question:

is there way can use optimize for clause within cte or subquery? i'd prefer use cte since cleaner , more legible.

the option keyword must placed @ end of outer select query.

for example:

declare @var int = 1;  cte (     select @var val ) select * cte option (optimize (@var = 2))

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