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https://issues.apache.org/jira/browse/HIVE-24221?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zoltan Haindrich resolved HIVE-24221.
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Fix Version/s: 4.0.0
Resolution: Fixed
merged into master. Thank you [~zabetak] for enhancing this!
> Use vectorizable expression to combine multiple columns in semijoin bloom
> filters
> ---------------------------------------------------------------------------------
>
> Key: HIVE-24221
> URL: https://issues.apache.org/jira/browse/HIVE-24221
> Project: Hive
> Issue Type: Improvement
> Components: Query Planning
> Environment:
> Reporter: Stamatis Zampetakis
> Assignee: Stamatis Zampetakis
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> Currently, multi-column semijoin reducers use an n-ary call to
> GenericUDFMurmurHash to combine multiple values into one, which is used as an
> entry to the bloom filter. However, there are no vectorized operators that
> treat n-ary inputs. The same goes for the vectorized implementation of
> GenericUDFMurmurHash introduced in HIVE-23976.
> The goal of this issue is to choose an alternative way to combine multiple
> values into one to pass in the bloom filter comprising only vectorized
> operators.
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