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https://issues.apache.org/jira/browse/HIVE-22200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16929814#comment-16929814
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Ashutosh Chauhan commented on HIVE-22200:
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+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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