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https://issues.apache.org/jira/browse/HIVE-24221?focusedWorklogId=523681&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-523681
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ASF GitHub Bot logged work on HIVE-24221:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 14/Dec/20 00:53
Start Date: 14/Dec/20 00:53
Worklog Time Spent: 10m
Work Description: github-actions[bot] commented on pull request #1544:
URL: https://github.com/apache/hive/pull/1544#issuecomment-744104254
This pull request has been automatically marked as stale because it has not
had recent activity. It will be closed if no further activity occurs.
Feel free to reach out on the d...@hive.apache.org list if the patch is in
need of reviews.
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Issue Time Tracking
-------------------
Worklog Id: (was: 523681)
Time Spent: 40m (was: 0.5h)
> 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: 40m
> 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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