SQL Server full text query across multiple tables - why so slow?

Question

I\'m trying to understand the performance of an SQL Server 2008 full-text query I am constructing.

The following query, using a full-text index, returns the correct

Answer 1

How does the execution plan for this compare?

SELECT
    O.ID, O.Name
FROM
    dbo.EventOccurrence O
    WHERE O.EventID IN (
            SELECT
                E.ID
            FROM
                 dbo.Event E
            WHERE
                FREETEXT(E.Name, 'search')
            UNION
            SELECT
                E.ID
            FROM
                 dbo.Event E
                INNER JOIN dbo.Venue V ON E.VenueID = V.ID
            WHERE
                FREETEXT(V.Name, 'search')
                )