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From "Hyunsik Choi (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (TAJO-126) Improve LogicalPlanner and LogicalOptimizer to support sclar subqueries
Date Sat, 12 Oct 2013 15:16:45 GMT

     [ https://issues.apache.org/jira/browse/TAJO-126?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hyunsik Choi updated TAJO-126:
------------------------------

    Fix Version/s:     (was: 0.2-incubating)
                   0.3-incubating

> Improve LogicalPlanner and LogicalOptimizer to support sclar subqueries
> -----------------------------------------------------------------------
>
>                 Key: TAJO-126
>                 URL: https://issues.apache.org/jira/browse/TAJO-126
>             Project: Tajo
>          Issue Type: Improvement
>          Components: planner/optimizer
>            Reporter: Hyunsik Choi
>             Fix For: 0.3-incubating
>
>
> The current logical planner and logical optimizer cannot support scalar subquery as follows:
> {code}
> SELECT col1, col2, col3 from tb1 where col1 < (select col3 from tb2);
> {code}
> We need to improve LogicalPlanner and LogicalOptimizer to support sclar subqueries.



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