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https://issues.apache.org/jira/browse/TAJO-429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jaehwa Jung resolved TAJO-429.
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Resolution: Won't Fix
This issue seems to be fix by lots of other patches.
> UNION clause has a problem in sub-query.
> ----------------------------------------
>
> Key: TAJO-429
> URL: https://issues.apache.org/jira/browse/TAJO-429
> Project: Tajo
> Issue Type: Bug
> Reporter: Jaehwa Jung
>
> If UNION clause write in SubQuery clause, TajoCli doesn't print any data.
> I found that UNION query is right as follows:
> {code:xml}
> tajo> select a.id, a.name from table1 a union select b.id, b.name from table4
> b ;
> Progress: 100%, response time: 0.382 sec
> final state: QUERY_SUCCEEDED, response time: 0.382 sec
> result:
> hdfs://localhost:9010/tmp/tajo-blrunner/staging/q_1387355494232_0050/RESULT,
> 6 rows (72 B)
> id, name
> -------------------------------
> 12, c02
> 13, c03
> 14, c04
> 15, c05
> 16, d01
> 17, d02
> 1, ooo
> 2, ppp
> 3, qqq
> 4, rrr
> 5, xxx
> tajo>
> {code}
> But, if I use UNION query in sub-query, there isn't any result data as
> follows:
> {code:xml}
> tajo> select * from (select a.id, a.name from table1 a union select b.id,
> b.name from table4 b) t;
> Progress: 100%, response time: 0.396 sec
> final state: QUERY_SUCCEEDED, response time: 0.396 sec
> result:
> hdfs://localhost:9010/tmp/tajo-blrunner/staging/q_1387355494232_0051/RESULT,
> 11 rows (0 B)
> id, name
> -------------------------------
> tajo>
> {code}
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