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https://issues.apache.org/jira/browse/HIVE-11335?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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fatkun updated HIVE-11335:
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Attachment: query1.txt
query2.txt
attach query explain
> Multi-Join Inner Query producing incorrect results
> --------------------------------------------------
>
> Key: HIVE-11335
> URL: https://issues.apache.org/jira/browse/HIVE-11335
> Project: Hive
> Issue Type: Bug
> Components: Query Planning
> Affects Versions: 1.1.0
> Environment: CDH5.4.0
> Reporter: fatkun
> Attachments: query1.txt, query2.txt
>
>
> test step
> {code}
> create table log (uid string, uid2 string);
> insert into log values ('1', '1');
> create table user (uid string, name string);
> insert into user values ('1', "test1");
> select b.name, c.name from log a
> left outer join (select uid, name from user) b on (a.uid=b.uid)
> left outer join user c on (a.uid2=c.uid);
> {code}
> return wrong result：
> 1 test1
> It should be both return test1
> I try to find error, if I use this query, return right result.（join key
> different）
> {code}
> select b.name, c.name from log a
> left outer join (select uid, name from user) b on (a.uid=b.uid)
> left outer join user c on (a.uid=c.uid);
> {code}
> The explain is different,Query1 only select one colum. It should select uid
> and name.
> {code}
> b:user
> TableScan
> alias: user
> Statistics: Num rows: 1 Data size: 7 Basic stats: COMPLETE Column
> stats: NONE
> Select Operator
> expressions: uid (type: string)
> outputColumnNames: _col0
> {code}
> I think there is something wrong in ColumnPruner.But i cannot find it out.
> It may relate HIVE-10996
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