Hyunsik Choi created TAJO-125:
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             Summary: Improve LogicalPlanner and LogicalOptimizer to support 
table subqueries
                 Key: TAJO-125
                 URL: https://issues.apache.org/jira/browse/TAJO-125
             Project: Tajo
          Issue Type: Improvement
          Components: planner/optimizer
            Reporter: Hyunsik Choi
            Assignee: Hyunsik Choi
             Fix For: 0.2-incubating


The current logical planner and logical optimizer cannot support table 
subqueries as follows:

{code}
SELECT col1, col2, col3 from tb1 join (select col3, col4 from tb2) on col1 = 
col2;
{code}

We need to improve LogicalPlanner and LogicalOptimizer to support table 
subqueries.

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