[jira] [Assigned] (TAJO-883) UNION should be compatible between similar types.

["Hyoungjun Kim (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAJO-883?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyoungjun Kim reassigned TAJO-883:
----------------------------------

    Assignee:     (was: Hyoungjun Kim)

> UNION should be compatible between similar types. 
> --------------------------------------------------
>
>                 Key: TAJO-883
>                 URL: https://issues.apache.org/jira/browse/TAJO-883
>             Project: Tajo
>          Issue Type: Improvement
>            Reporter: Hyoungjun Kim
>            Priority: Trivial
>
> If each result type in a union's subquery is INT4 and INT8, a type mismatch error occurs.
> {code:sql}
> select 0::INT4 from lineitem union all select 1::INT8 from lineitem
> {code}
> {noformat}
> org.apache.tajo.engine.exception.VerifyException: UNION types INT4 and INT8 cannot be matched
> 	at org.apache.tajo.master.GlobalEngine.createLogicalPlan(GlobalEngine.java:498)
> 	at org.apache.tajo.master.GlobalEngine.executeQuery(GlobalEngine.java:148)
> 	at org.apache.tajo.master.TajoMasterClientService$TajoMasterClientProtocolServiceHandler.submitQuery(TajoMasterClientService.java:261)
> {noformat}



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