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Also, it depends on how simple is your WHERE clause - if it contains a function that operates on a column, it is NOT simple anymore.

On 3/4/2013 10:22 AM, James H. H. Lampert wrote:
On 3/2/13 9:35 AM, CRPence wrote:
Actually to be UNION'd is more [work] than to be UNION ALL'd ;-)
I'm more interested in why adding censorship with a simple WHERE clause
in the VIEW definition is adding a nested loop join.

And in which branch of the UNION ALL is causing the entire view to be
scanned, from top to bottom.

--
JHHL


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