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From "ASF GitHub Bot (JIRA)" <>
Subject [jira] [Work logged] (HIVE-22003) Shared work optimizer may leave semijoin branches in plan that are not used
Date Mon, 22 Jul 2019 23:06:00 GMT


ASF GitHub Bot logged work on HIVE-22003:

                Author: ASF GitHub Bot
            Created on: 22/Jul/19 23:05
            Start Date: 22/Jul/19 23:05
    Worklog Time Spent: 10m 
      Work Description: vineetgarg02 commented on pull request #729: HIVE-22003

 File path: ql/src/java/org/apache/hadoop/hive/ql/optimizer/
 @@ -486,6 +510,75 @@ private static boolean sharedWorkOptimization(ParseContext pctx, SharedWorkOptim
     return mergedExecuted;
+  private static void replaceSemijoinExpressions(TableScanOperator tsOp, List<ExprNodeDesc>
semijoinExprNodes) {
 Review comment:
   If I understand this correctly this is suppose to remove all semijoin related expressions
from TS as well as its children filter op. Why is this method taking `retainableTsOp's` `semijoinExprNodes`?
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Issue Time Tracking

            Worklog Id:     (was: 280684)
            Time Spent: 10m
    Remaining Estimate: 0h

> Shared work optimizer may leave semijoin branches in plan that are not used
> ---------------------------------------------------------------------------
>                 Key: HIVE-22003
>                 URL:
>             Project: Hive
>          Issue Type: Bug
>          Components: Physical Optimizer
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: HIVE-22003.01.patch, HIVE-22003.01.patch, HIVE-22003.patch
>          Time Spent: 10m
>  Remaining Estimate: 0h
> This may happen only when the TS are the only operators that are shared. Repro attached
in q file.

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