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Add distinct if needed to the right side of a semijoin #24510

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kaikalur opened this issue Feb 6, 2025 · 0 comments

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intermediate-task optimizer Query Optimization

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kaikalur commented Feb 6, 2025

Looks like SetBuilder works best when you give it distinct elements. So when we see something like:

select ... from t1
where id in (select id from t2)

we should distinct id in t2

kaikalur added intermediate-task Query Optimization optimizer labels

github-project-automation bot added this to Presto Optimizer

github-project-automation bot moved this to 🆕 Unprioritized in Presto Optimizer

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