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Type All in Explain for Union Query

I am trying to optimize a union query for which the union result is a
type of all, but when each component is explained the types are either
ref or eq_ref. There are quite a few tables and views which form the
bases for the ultimate query, so I don't think posting all of those
would be viable. I am just looking for pointers.
Aug 11 '06 #1
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