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https://issues.apache.org/jira/browse/SPARK-41509?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan reassigned SPARK-41509:
-----------------------------------
Assignee: jiaan.geng
> Delay execution hash until after aggregation for semi-join runtime filter.
> --------------------------------------------------------------------------
>
> Key: SPARK-41509
> URL: https://issues.apache.org/jira/browse/SPARK-41509
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: jiaan.geng
> Assignee: jiaan.geng
> Priority: Major
>
> Currently, Spark runtime filter supports bloom filter and in subquery filter.
> The in subquery filter always execute Murmur3Hash before aggregate the join
> key.
> Because the data size before aggregate will lager than after, we can delay
> execute Murmur3Hash until after aggregation for semi-join runtime filter and
> it will reduce the number of calls to Murmur3Hash and improve performance.
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