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Compute Scalars, Expressions and Execution Plan Performance
The humble Compute Scalar is one of the least well-understood of the execution plan operators, and usually the last place people look for query performance problems. It often appears in execution plans with a very low (or even zero) cost, which goes some way to explaining why people ignore it. Some readers will already know that a Compute ...
Paul White: Page Free Space
September 4, 2012
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