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From "ASF GitHub Bot (JIRA)" <>
Subject [jira] [Work logged] (HIVE-21867) Sort semijoin conditions to accelerate query processing
Date Tue, 25 Jun 2019 21:29:00 GMT


ASF GitHub Bot logged work on HIVE-21867:

                Author: ASF GitHub Bot
            Created on: 25/Jun/19 21:28
            Start Date: 25/Jun/19 21:28
    Worklog Time Spent: 10m 
      Work Description: vineetgarg02 commented on pull request #687: HIVE-21867

 File path: ql/src/java/org/apache/hadoop/hive/ql/parse/
 @@ -1766,6 +1774,59 @@ private void removeSemijoinOptimizationByBenefit(OptimizeTezProcContext
       GenTezUtils.removeSemiJoinOperator(procCtx.parseContext, rs, ts);
+    for (Entry<FilterOperator, Collection<SemijoinOperatorInfo>> e : globalReductionFactorMap.asMap().entrySet())
 Review comment:
   Creating separate method for this and adding comments to explain why we are doing it will
be nice.
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Issue Time Tracking

    Worklog Id:     (was: 267052)
    Time Spent: 40m  (was: 0.5h)

> Sort semijoin conditions to accelerate query processing
> -------------------------------------------------------
>                 Key: HIVE-21867
>                 URL:
>             Project: Hive
>          Issue Type: New Feature
>          Components: Physical Optimizer
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: HIVE-21867.02.patch, HIVE-21867.03.patch, HIVE-21867.patch
>          Time Spent: 40m
>  Remaining Estimate: 0h
> The problem was tackled for CBO in HIVE-21857. Semijoin filters are introduced later
in the planning phase. Follow similar approach to sort them, trying to accelerate filter evaluation.

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