[jira] [Work started] (HIVE-6934) PartitionPruner doesn't handle top level constant expression correctly

["Hari Sankar Sivarama Subramaniyan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-6934?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HIVE-6934 started by Hari Sankar Sivarama Subramaniyan.
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> PartitionPruner doesn't handle top level constant expression correctly
> ----------------------------------------------------------------------
>
>                 Key: HIVE-6934
>                 URL: https://issues.apache.org/jira/browse/HIVE-6934
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Harish Butani
>            Assignee: Hari Sankar Sivarama Subramaniyan
>            Priority: Critical
>             Fix For: 0.14.0
>
>         Attachments: HIVE-6934.4.patch, HIVE-6934.5.patch, HIVE-6934.6.patch, HIVE-6934.7.patch, HIVE-6934.8.patch, HIVE-6934.9.patch, HIVE-6934.91.patch
>
>
> You hit this error indirectly, because how we handle invalid constant comparisons. Consider:
> {code}
> create table x(key int, value string) partitioned by (dt int, ts string);
> -- both these queries hit this issue
> select * from x where key = 'abc';
> select * from x where dt = 'abc';
> -- the issue is the comparison get converted to the constant false
> -- and the PartitionPruner doesn't handle top level constant exprs corrcetly
> {code}
> Thanks to [~hsubramaniyan] for uncovering this as part of adding tests for HIVE-5376



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