Is there any way to limit the size of the QueryResults?

Simple scenario is that I have a single table with 20000 rows in it
(assume no other relationships).  I'm trying to find the row which is
the newest.

My OQL is:
SELECT n FROM com.softswitch.db.model.Test n WHERE serialNumber=$1 ORDER
BY createTime desc

Due to the ordering, I only need the first object returned from the
QueryResults.  Essentially what I need is:

SELECT TOP 1 n FROM com.softswitch.db.model.Test n WHERE type=$1 ORDER
BY createTime desc

in the syntax of SQL Server.  Lazy loading won't help me as I understand
it since this isn't some 1:many relationship or dependent object, etc.

Thanks,
 - John

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