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From "ASF GitHub Bot (Jira)" <j...@apache.org>
Subject [jira] [Work logged] (HIVE-22200) Hash collision may cause column resolution to fail
Date Sat, 14 Sep 2019 19:56:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-22200?focusedWorklogId=312588&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-312588
]

ASF GitHub Bot logged work on HIVE-22200:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 14/Sep/19 19:55
            Start Date: 14/Sep/19 19:55
    Worklog Time Spent: 10m 
      Work Description: jcamachor commented on pull request #775: HIVE-22200
URL: https://github.com/apache/hive/pull/775
 
 
   
 
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Issue Time Tracking
-------------------

            Worklog Id:     (was: 312588)
    Remaining Estimate: 0h
            Time Spent: 10m

> Hash collision may cause column resolution to fail
> --------------------------------------------------
>
>                 Key: HIVE-22200
>                 URL: https://issues.apache.org/jira/browse/HIVE-22200
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>            Priority: Critical
>              Labels: pull-request-available
>         Attachments: HIVE-22200.01.patch, HIVE-22200.patch, HIVE-22200.patch, HIVE-22200.patch
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> {{ExprNodeDescUtils.getExprNodeColumnDesc}} extracts the {{ExprNodeColumnDesc}} (column
descriptors) from an expression. In fact, it creates a map from hash to the object itself.
If same hash value is generated for two different objects, this will result in a clash in
the map and some expressions not being part of its values.



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