Row counts and arrow width, read or returned
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In my last two posts, I presented use cases for the Actual Number of Rows and Estimated Number of Rows properties, and showcased one shortcoming. Was that the only problem with these properties? Unfortunately not. Rows read versus rows returned The visual of the arrows in an execution plan strongly suggests that they represent the flow of rows from one operator to another. And hence, the width of that arrow strongly appears to be an indication of how many rows are passed between the connected operators. That used to be always the case. But unfortunately, this changed in December 2017…
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