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Posted to reviews@spark.apache.org by "wankunde (via GitHub)" <gi...@apache.org> on 2023/10/18 15:15:43 UTC
[PR] [SPARK-45594][SQL] Auto repartition before writing data into partitioned or bucket table [spark]
wankunde opened a new pull request, #43437:
URL: https://github.com/apache/spark/pull/43437
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### What changes were proposed in this pull request?
Add a new rule **RepartitionBeforeWriting** to add a shuffle before writing data into partitioned table or bucket table when
**AUTO_REPARTITION_FOR_WRITING_ENABLED** is true, which can avoid creating too many small files.
* For bucket tables, repartition by bucket columns.
* For partition tables, repartition by dynamic partition columns.
### Why are the changes needed?
Now, when writing data into partitioned table, there will be at least dynamicPartitions * ShuffleNum files; when writing data into bucket table, there will be at least bucketNums * shuffleNum files.
We can shuffle by the dynamic partitions or bucket columns before writing data into the table and will create ShuffleNum files.
There is a similar rule in kyuubi:
https://github.com/apache/kyuubi/blob/f7143273a52b1b0735108ef1733781820098aa99/extensions/spark/kyuubi-extension-spark-3-5/src/main/scala/org/apache/kyuubi/sql/RebalanceBeforeWriting.scala
### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
Added UT
### Was this patch authored or co-authored using generative AI tooling?
No
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Re: [PR] [SPARK-45594][SQL] Auto repartition before writing data into partitioned or bucket table [spark]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] closed pull request #43437: [SPARK-45594][SQL] Auto repartition before writing data into partitioned or bucket table
URL: https://github.com/apache/spark/pull/43437
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Re: [PR] [SPARK-45594][SQL] Auto repartition before writing data into partitioned or bucket table [spark]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] commented on PR #43437:
URL: https://github.com/apache/spark/pull/43437#issuecomment-1913776358
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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