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From "Ashutosh Chauhan (Jira)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-22200) Hash collision may cause column resolution to fail
Date Sat, 14 Sep 2019 20:13:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-22200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16929814#comment-16929814
] 

Ashutosh Chauhan commented on HIVE-22200:
-----------------------------------------

+1

> 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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