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Posted to issues@hive.apache.org by "Jesus Camacho Rodriguez (Jira)" <ji...@apache.org> on 2019/09/13 06:43:00 UTC

[jira] [Work started] (HIVE-22200) Hash collision may cause column resolution to fail

     [ https://issues.apache.org/jira/browse/HIVE-22200?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HIVE-22200 started by Jesus Camacho Rodriguez.
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> 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
>         Attachments: HIVE-22200.patch
>
>
> {{ExprNodeDescUtils.getExprNodeColumnDesc}} extracts the {{ExprNodeColumnDesc}} (column descriptors) from an expression. In fact, it creates a map from hash to the object itself. It 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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