maryannxue opened a new pull request #27857: [SPARK-31096][SQL] Replace `Array` with `Seq` in AQE `CustomShuffleReaderExec` URL: https://github.com/apache/spark/pull/27857 ### What changes were proposed in this pull request? This PR changes the type of `CustomShuffleReaderExec`'s `partitionSpecs` from `Array` to `Seq`, since `Array` compares references not values for equality, which could lead to potential plan reuse problem. ### Why are the changes needed? Unlike `Seq`, `Array` compares references not values for equality, which could lead to potential plan reuse problem. ### Does this PR introduce any user-facing change? No. ### How was this patch tested? Passes existing UTs.
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