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From "Aihua Xu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-14251) Union All of different types resolves to incorrect data
Date Fri, 22 Jul 2016 17:28:20 GMT

     [ https://issues.apache.org/jira/browse/HIVE-14251?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aihua Xu updated HIVE-14251:
----------------------------
    Status: Open  (was: Patch Available)

> Union All of different types resolves to incorrect data
> -------------------------------------------------------
>
>                 Key: HIVE-14251
>                 URL: https://issues.apache.org/jira/browse/HIVE-14251
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Planning
>    Affects Versions: 2.0.0
>            Reporter: Aihua Xu
>            Assignee: Aihua Xu
>         Attachments: HIVE-14251.1.patch, HIVE-14251.2.patch
>
>
> create table src(c1 date, c2 int, c3 double);
> insert into src values ('2016-01-01',5,1.25);
> select * from 
> (select c1 from src union all
> select c2 from src union all
> select c3 from src) t;
> It will return NULL for the c1 values. Seems the common data type is resolved to the
last c3 which is double.



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