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Making Life Harder for Filter Operators

Erik Darling has a how-not-to guide for us:

We looked at a couple examples of when SQL Server might need to filter out rows later in the plan than we’d like, and why that can cause performance issues.

Now it’s time to look at a few more examples, because a lot of people find them surprising.

Read on for several examples. Also, because the bribes came through I don’t mind shilling for Erik, check out 25 hours of recorded content for $100. I think Erik’s knowledge is worth at least $4 an hour. Maybe even $5.