Hot answers tagged execution-plan
Try: LEFT OUTER JOIN TaskItems AS TI ON O.OwnerId = TI.OwnerId AND LastOperationTime IS NOT NULL The engine could be grabbing the Null row separately, as it's a slightly different scenario to not finding one. But as you essentially want the same behaviour, just out the explicit filter in there, within the ON clause of your LEFT JOIN. Then the only NULLs ...
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