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From "Sean Hsuan-Yi Chu (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (DRILL-1986) Natural join query returns wrong result
Date Thu, 29 Jan 2015 22:38:35 GMT

     [ https://issues.apache.org/jira/browse/DRILL-1986?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sean Hsuan-Yi Chu reopened DRILL-1986:
--------------------------------------

> Natural join query returns wrong result
> ---------------------------------------
>
>                 Key: DRILL-1986
>                 URL: https://issues.apache.org/jira/browse/DRILL-1986
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Query Planning & Optimization
>    Affects Versions: 0.8.0
>            Reporter: Victoria Markman
>            Assignee: Sean Hsuan-Yi Chu
>
> Natural join returns wrong result:
> {code}
> 0: jdbc:drill:schema=dfs> select * from `t1.json`;
> +------------+------------+------------+
> |     a1     |     b1     |     c1     |
> +------------+------------+------------+
> | 1          | 1          | 2015-01-01 |
> | 2          | 2          | 2015-01-02 |
> +------------+------------+------------+
> 2 rows selected (0.087 seconds)
> 0: jdbc:drill:schema=dfs> select * from `t2.json`;
> +------------+------------+------------+
> |     a1     |     b1     |     c1     |
> +------------+------------+------------+
> | 1          | 1          | 2015-01-01 |
> +------------+------------+------------+
> 1 row selected (0.112 seconds)
> 0: jdbc:drill:schema=dfs> select * from `t1.json` natural join `t2.json`;
> +------------+------------+------------+------------+------------+------------+
> |     a1     |     b1     |     c1     |    a10     |    b10     |    c10     |
> +------------+------------+------------+------------+------------+------------+
> +------------+------------+------------+------------+------------+------------+
> No rows selected (0.223 seconds)
> {code}
> Equivalent inner join query returns one row:
> {code}
> 0: jdbc:drill:schema=dfs> select * from `t1.json` t1, `t2.json` t2 where t1.a1=t2.a1
and t1.b1=t2.b1 and t1.c1=t2.c1;
> +------------+------------+------------+------------+------------+------------+
> |     a1     |     b1     |     c1     |    a10     |    b10     |    c10     |
> +------------+------------+------------+------------+------------+------------+
> | 1          | 1          | 2015-01-01 | 1          | 1          | 2015-01-01 |
> +------------+------------+------------+------------+------------+------------+
> 1 row selected (0.732 seconds)
> {code}
> Natural join is listed as supported in our documentation. 
> If we decide not to support it, we need to make sure to remove it from docs as well.



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