[jira] Assigned: (HIVE-747) void type (null column) cannot be UNIONed with other type

["Ning Zhang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ning Zhang reassigned HIVE-747:
-------------------------------

    Assignee: Ning Zhang

> void type (null column) cannot be UNIONed with other type
> ---------------------------------------------------------
>
>                 Key: HIVE-747
>                 URL: https://issues.apache.org/jira/browse/HIVE-747
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Ning Zhang
>            Assignee: Ning Zhang
>
> hive> select * from (select NULL from zshao_tt union all select 1 from zshao_tt)x;
> select * from (select NULL from zshao_tt union all select 1 from zshao_tt)x;
> FAILED: Error in semantic analysis: Schema of both sides of union should match: Column _c0 is of type void on first table and type int on second table

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