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Posted to issues@quickstep.apache.org by "Zuyu Zhang (JIRA)" <ji...@apache.org> on 2018/04/27 13:08:00 UTC

[jira] [Assigned] (QUICKSTEP-121) Self-join support

     [ https://issues.apache.org/jira/browse/QUICKSTEP-121?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zuyu Zhang reassigned QUICKSTEP-121:
------------------------------------

    Assignee: Zuyu Zhang

> Self-join support
> -----------------
>
>                 Key: QUICKSTEP-121
>                 URL: https://issues.apache.org/jira/browse/QUICKSTEP-121
>             Project: Apache Quickstep
>          Issue Type: Improvement
>          Components: Expressions, Query Execution, Query Optimizer, Relational Operators
>            Reporter: Zuyu Zhang
>            Assignee: Zuyu Zhang
>            Priority: Major
>
> Quickstep does not support a self-join, and has a workaround that creates a false filter predicate.
>  
> The problem seems that the ScalarAttribute does not recognize a table alias in the self-join case.



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