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Posted to reviews@spark.apache.org by "MRKKmrkk (via GitHub)" <gi...@apache.org> on 2025/09/26 13:24:00 UTC
[PR] [SPARK-53718][SQL] Add a new Optimizer rule to flatten nested MapConcat expressions [spark]
MRKKmrkk opened a new pull request, #52469:
URL: https://github.com/apache/spark/pull/52469
### What changes were proposed in this pull request?
Add a new Optimizer rule to flatten nested MapConcat expressions in two ways:
1.Flattens nested MapConcat expressions into a single MapConcat.
Example: `map_concat(map('a', 'a1'), map_concat(map('b', 'b1'), map('c', 'c1'))) → map_concat(map('a', 'a1'), map('b', 'b1'), map('c', 'c1'))`
2.Extracts the child directly when MapConcat has only one child
Example: `map_concat(map('a', 'a1')) → map('a', 'a1')`
### Does this PR introduce any user-facing change?
No.
### How was this patch tested?
SQLQueryTestSuite and CombineMapConcatsSuite.
### Was this patch authored or co-authored using generative AI tooling?
No.
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Re: [PR] [SPARK-53718][SQL] Add a new Optimizer rule to flatten nested MapConcat expressions [spark]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] commented on PR #52469:
URL: https://github.com/apache/spark/pull/52469#issuecomment-3708586902
We're closing this PR because it hasn't been updated in a while. This isn't a judgement on the merit of the PR in any way. It's just a way of keeping the PR queue manageable.
If you'd like to revive this PR, please reopen it and ask a committer to remove the Stale tag!
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Re: [PR] [SPARK-53718][SQL] Add a new Optimizer rule to flatten nested MapConcat expressions [spark]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] closed pull request #52469: [SPARK-53718][SQL] Add a new Optimizer rule to flatten nested MapConcat expressions
URL: https://github.com/apache/spark/pull/52469
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