Hello,

How can I do a sum using a LINQ query when the query produces no
elements?

Int32 sum = (from a in session.Query<AnalogicalValue>() select
a.Value).Sum();

This fails with a NullReferenceException. The DefaultIfEmpty operator
could probably solve this, but it is not yet implemented.
Does any of you guys have a solution? Shall I add a JIRA issue for
implementing the DefaultIfEmpty operator?

Thanks!

RP

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