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Posted to issues@spark.apache.org by "Ke Jia (Jira)" <ji...@apache.org> on 2019/10/22 06:55:00 UTC
[jira] [Commented] (SPARK-29544) Optimize skewed join at runtime
with new Adaptive Execution
[ https://issues.apache.org/jira/browse/SPARK-29544?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16956744#comment-16956744 ]
Ke Jia commented on SPARK-29544:
--------------------------------
[~wenchen] The attachment is the design doc of skew join optimization. We can have a discussion based on this doc. Thanks.
> Optimize skewed join at runtime with new Adaptive Execution
> -----------------------------------------------------------
>
> Key: SPARK-29544
> URL: https://issues.apache.org/jira/browse/SPARK-29544
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Ke Jia
> Priority: Major
> Attachments: Skewed Join Optimization Design Doc.docx
>
>
> Implement a rule in the new adaptive execution framework introduced in [SPARK-23128|https://issues.apache.org/jira/browse/SPARK-23128]. This rule is used to handle the skew join optimization based on the runtime statistics (data size and row count).
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