The optimizer has options.

Not every option is optimal.

Optimistic query tuners hope that the optimizer will make optimal choices.

Often, the optimizer will stick an optional operator in a plan that just doesn't belong.

Sorts, Spools, Lookups, Tops, Aggregates, and Bitmaps can all end up where they don't belong.

Opt out of bad powerpoint decks with this demo-only session!

Joe Obbish and Erik Darling will show you when the optimizer's optics might require a trip to the optometrist.

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