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From "Aihua Xu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-14251) Union All of different types resolves to incorrect data
Date Fri, 15 Jul 2016 18:26:20 GMT
Aihua Xu created HIVE-14251:
-------------------------------

             Summary: 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
            Reporter: Aihua Xu
            Assignee: Aihua Xu


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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