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https://issues.apache.org/jira/browse/TAJO-585?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jaehwa Jung updated TAJO-585:
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Attachment: TAJO-585_2.patch
I uploaded second patch.
> TajoCli prints unexpected results in simple union query.
> --------------------------------------------------------
>
> Key: TAJO-585
> URL: https://issues.apache.org/jira/browse/TAJO-585
> Project: Tajo
> Issue Type: Bug
> Components: query master
> Affects Versions: 0.8-incubating
> Reporter: Jaehwa Jung
> Assignee: Jaehwa Jung
> Fix For: 0.8-incubating
>
> Attachments: TAJO-585.patch, TAJO-585_2.patch
>
>
> I found a bug which TajoCli prints unexpected results in union query.
> For the first, TajoCli prints wrong row numbers as follows:
> {code:xml}
> tajo> select id from table1 union all select id from table2;
> result:
> hdfs://localhost:9010/tmp/tajo-blrunner/staging/q_1391680780275_0004/RESULT,
> 5 rows (21 B)
> id
> -------------------------------
> 6
> 7
> 8
> 9
> 10
> 1
> 2
> 3
> 4
> 5
> {code}
> And if empty table located on last phase, it just prints zero as follows:
> {code:xml}
> tajo> select id from table1 union all select id from table3;
> result:
> hdfs://localhost:9010/tmp/tajo-blrunner/staging/q_1391680780275_0005/RESULT,
> 0 rows (10 B)
> id
> -------------------------------
> {code}
> For reference, I created test tables as follows:
> {code:xml}
> CREATE EXTERNAL TABLE table1 (id INT4, name TEXT, score FLOAT4, type TEXT)
> USING CSV WITH ('csvfile.delimiter'='|') LOCATION
> 'hdfs://localhost:9010/tajo/warehouse/table1';
> CREATE EXTERNAL TABLE table2 (id INT4, name TEXT, score FLOAT4, type TEXT)
> USING CSV WITH ('csvfile.delimiter'='|') LOCATION
> 'hdfs://localhost:9010/tajo/warehouse/table2';
> CREATE EXTERNAL TABLE table3 (id INT4, name TEXT, score FLOAT4, type TEXT)
> USING CSV WITH ('csvfile.delimiter'='|') LOCATION
> 'hdfs://localhost:9010/tajo/warehouse/table3';
> tajo> select * from table1;
> result:
> hdfs://localhost:9010/tmp/tajo-blrunner/staging/q_1391680780275_0001/RESULT,
> 5 rows (60 B)
> id, name, score, type
> -------------------------------
> 1, ooo, 1.1, a
> 2, ppp, 2.3, b
> 3, qqq, 3.4, c
> 4, rrr, 4.5, d
> 5, xxx, 5.6, e
> tajo> select * from table2;
> result:
> hdfs://localhost:9010/tmp/tajo-blrunner/staging/q_1391680780275_0002/RESULT,
> 5 rows (61 B)
> id, name, score, type
> -------------------------------
> 6, ooo, 1.1, a
> 7, ppp, 2.3, b
> 8, qqq, 3.4, c
> 9, rrr, 4.5, d
> 10, xxx, 5.6, e
> tajo> select * from table3;
> result:
> hdfs://localhost:9010/tmp/tajo-blrunner/staging/q_1391680780275_0003/RESULT,
> 0 rows (0 B)
> id, name, score, type
> -------------------------------
> {code}
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