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From "Jacques Nadeau (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-1169) Simple UNION query fails
Date Fri, 25 Jul 2014 17:19:39 GMT

    [ https://issues.apache.org/jira/browse/DRILL-1169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14074607#comment-14074607
] 

Jacques Nadeau commented on DRILL-1169:
---------------------------------------

Drill doesn't support a distinct UNION yet.  Currently only UNION ALL is supported.

> Simple UNION query fails
> ------------------------
>
>                 Key: DRILL-1169
>                 URL: https://issues.apache.org/jira/browse/DRILL-1169
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Query Planning & Optimization
>         Environment: Running Drill on MacOSX standalone.
> #Sun Jul 20 20:12:53 PDT 2014
> git.commit.id.abbrev=e5c2da0
>            Reporter: Bob Rumsby
>
> A query that selects a compatible column from the same JSON file on either side of the
UNION operator fails. The same query works if UNION ALL is used. 
> Example of Failure:
> 0: jdbc:drill:zk=local> select id from dfs.`/Users/brumsby/drill/donuts.json` union
select id from dfs.`/Users/brumsby/drill/donuts.json`;
> Query failed: org.apache.drill.exec.rpc.RpcException: Remote failure while running query.[error_id:
"dfe76b6b-7eb0-49ee-8084-1e29ea995be0"
> endpoint {
>   address: "10.250.0.28"
>   user_port: 31010
>   control_port: 31011
>   data_port: 31012
> }
> error_type: 0
> message: "Failure while parsing sql. < CannotPlanException:[ Node [rel#880:Subset#6.PHYSICAL.SINGLETON([]).[]]
could not be implemented; planner state:
> ...
> Same query with UNION ALL (which works):
> 0: jdbc:drill:zk=local> select id from dfs.`/Users/brumsby/drill/donuts.json` union
all select id from dfs.`/Users/brumsby/drill/donuts.json`;
> +------------+
> |     id     |
> +------------+
> | 0001       |
> | 0001       |
> +------------+
> 2 rows selected (0.111 seconds)



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