[SPARK-43838][SQL][FOLLOWUP] Replace HashSet with HashMap to improve performance of DeduplicateRelations
#48392
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cloud-fan
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HyukjinKwon
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…ove performance of `DeduplicateRelations` ### What changes were proposed in this pull request? This PR replaces `HashSet` that is currently used with a `HashMap` to improve `DeduplicateRelations` performance. Additionally, this PR reverts apache#48053 as that change is no longer needed ### Why are the changes needed? Current implementation doesn't utilize `HashSet` properly, but instead performs multiple linear searches on the set creating a O(n^2) complexity ### Does this PR introduce _any_ user-facing change? ### How was this patch tested? Existing tests ### Was this patch authored or co-authored using generative AI tooling? Closes apache#48392 from mihailotim-db/mihailotim-db/master. Authored-by: Mihailo Timotic <mihailo.timotic@databricks.com> Signed-off-by: Hyukjin Kwon <gurwls223@apache.org>
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What changes were proposed in this pull request?
This PR replaces
HashSetthat is currently used with aHashMapto improveDeduplicateRelationsperformance.Additionally, this PR reverts #48053 as that change is no longer needed
Why are the changes needed?
Current implementation doesn't utilize
HashSetproperly, but instead performs multiple linear searches on the set creating a O(n^2) complexityDoes this PR introduce any user-facing change?
How was this patch tested?
Existing tests
Was this patch authored or co-authored using generative AI tooling?