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https://issues.apache.org/jira/browse/HIVE-24221?focusedWorklogId=524216&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-524216
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ASF GitHub Bot logged work on HIVE-24221:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 15/Dec/20 02:36
Start Date: 15/Dec/20 02:36
Worklog Time Spent: 10m
Work Description: jcamachor commented on pull request #1544:
URL: https://github.com/apache/hive/pull/1544#issuecomment-745013346
@zabetak , can this be rebased / merged?
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Issue Time Tracking
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Worklog Id: (was: 524216)
Time Spent: 1h (was: 50m)
> 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
> Time Spent: 1h
> 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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