sql - Return master rows based on detail filter -

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I have a query where I want to return the master lines, depending on whether the extension meets certain criteria .

For example, I want to return only a special master line if at least one extension rows have someProperty = X.

Based on the following determination: 

  Predicate = predicate.And (p = & gt; p.basketItems.Where (obi = & gt; obi.basketItemTypeID == (Int) basketball type. Refund. Count ()> gt; 0);

Generates the following SQL: 

  SELECT COUNT (*) FROM [dbo] [BasketetTemplate] AS [T3] WHERE ([T3]. [Basket ID] = [T.]. [Orderbosacetid]] and ([T3]. [TokiTyType ID] = 3)))) 0)

This is scanning a table, so the query may take some time to run.

Just by checking that I am not doing anything crazy, I wonder if there is something that can trigger this query?

Thanks Duncan 

  M.basketID, max (M.field1 ) As field1, max (M.field2) as d2.basketItems as field 2, connect to the extension on M.basketID = detail.basketID, where detail.basketItemTypeID = '3' group M.basketID < / Code>

(Connect to Master in detail. Select all the rows where the required criteria are in detail. As a result press the rows down from 1 to record per owner.)


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