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https://issues.apache.org/jira/browse/HIVE-2901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13248260#comment-13248260
]
Hudson commented on HIVE-2901:
------------------------------
Integrated in Hive-trunk-h0.21 #1357 (See
[https://builds.apache.org/job/Hive-trunk-h0.21/1357/])
HIVE-2901 Hive union with NULL constant and string in same column returns
all null
(Navis via namit) (Revision 1310179)
Result = SUCCESS
namit : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1310179
Files :
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/FunctionRegistry.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java
* /hive/trunk/ql/src/test/queries/clientpositive/union_null.q
* /hive/trunk/ql/src/test/results/clientpositive/union_null.q.out
> Hive union with NULL constant and string in same column returns all null
> ------------------------------------------------------------------------
>
> Key: HIVE-2901
> URL: https://issues.apache.org/jira/browse/HIVE-2901
> Project: Hive
> Issue Type: Bug
> Reporter: Kevin Wilfong
> Assignee: Navis
> Priority: Critical
> Attachments: HIVE-2901.D2541.1.patch, HIVE-2901.D2541.2.patch,
> HIVE-2901.D2541.3.patch
>
>
> select x from (select value as x from src union all select NULL as x from
> src)a;
> This query produces all nulls, where value is a string column.
> Notably,
> select x from (select key as x from src union all select NULL as x from src)a;
> where key is a string, but can be cast to a double, the query returns correct
> results.
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