[jira] [Updated] (DRILL-2207) Fix Union All Operator

["Jacques Nadeau (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DRILL-2207?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jacques Nadeau updated DRILL-2207:
----------------------------------
    Summary: Fix Union All Operator  (was: Union All Design Proposal)

> Fix Union All Operator
> ----------------------
>
>                 Key: DRILL-2207
>                 URL: https://issues.apache.org/jira/browse/DRILL-2207
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Execution - Relational Operators
>            Reporter: Sean Hsuan-Yi Chu
>            Assignee: Sean Hsuan-Yi Chu
>            Priority: Critical
>             Fix For: 0.8.0
>
>         Attachments: DRILL-2207.1.patch
>
>
> The current specification/behavior of UNION ALL is not well defined. 
> This issue attempts to reach agreement on the expected behavior of UNION ALL.
> A link for the latest design document is below: 
> https://docs.google.com/document/d/1OQFQ6IvdeBJkDLKHFBlwP3tle2WuzpBgZf6R_6Vh0mw/edit
> ..............................................................................................................................
> An example of the current implementation:
> (select n_name from cp.`tpch/nation.parquet` limit 1)" +
>             "UNION ALL " +
>          "(select r_name from cp.`tpch/region.parquet` limit 1);
> returns:
> n_name
> ALGERIA
> r_name
> AFRICA



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