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Message Posted: Tue, 18 Aug 2015 @ 20:17:31 GMT
Looks like it would always be a full table scan as there is no filter condition. Your output table will be 5.5 billion rows minus duplicates.
What is happening in viewMED? I assume this is a view. Is There something else going on in this view? Table joins? Case statements?
Did you try a GROUP BY or DISTINCT to get rid of duplicates?
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