[jira] [Created] (TAJO-739) A subquery with the same column alias caused planning error.

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

hyoungjunkim created TAJO-739:
---------------------------------

             Summary: A subquery with the same column alias caused planning error.
                 Key: TAJO-739
                 URL: https://issues.apache.org/jira/browse/TAJO-739
             Project: Tajo
          Issue Type: Bug
            Reporter: hyoungjunkim
            Priority: Minor


I ran the bellow query.
{code:sql}
select nation.n_nationkey as n_nationkey,
       nation.n_name as n_name
from nation 
inner join (select distinct c_nationkey as n_nationkey from customer) a
on nation.n_nationkey = a.n_nationkey     
{code}

{noformat}
2014-04-07 10:52:26,419 ERROR org.apache.tajo.master.querymaster.QueryMasterTask: Already Exists Field: tpch100.a.n_nationkey
org.apache.tajo.catalog.exception.AlreadyExistsFieldException: Already Exists Field: tpch100.a.n_nationkey
        at org.apache.tajo.catalog.Schema.addColumn(Schema.java:287)
        at org.apache.tajo.catalog.Schema.addColumn(Schema.java:299)
        at org.apache.tajo.catalog.Schema.clone(Schema.java:330)
        at org.apache.tajo.engine.utils.SchemaUtil.clone(SchemaUtil.java:66)
        at org.apache.tajo.engine.planner.global.DataChannel.setSchema(DataChannel.java:180)
        at org.apache.tajo.engine.planner.global.DataChannel.<init>(DataChannel.java:55)
        at org.apache.tajo.engine.planner.global.GlobalPlanner.createDataChannelFromJoin(GlobalPlanner.java:157)
        at org.apache.tajo.engine.planner.global.GlobalPlanner.buildJoinPlan(GlobalPlanner.java:258)
        at org.apache.tajo.engine.planner.global.GlobalPlanner.access$300(GlobalPlanner.java:55)
        at org.apache.tajo.engine.planner.global.GlobalPlanner$DistributedPlannerVisitor.visitJoin(GlobalPlanner.java:1006)
        at org.apache.tajo.engine.planner.global.GlobalPlanner$DistributedPlannerVisitor.visitJoin(GlobalPlanner.java:867)
        at org.apache.tajo.engine.planner.BasicLogicalPlanVisitor.visit(BasicLogicalPlanVisitor.java:81)
        at org.apache.tajo.engine.planner.BasicLogicalPlanVisitor.visitRoot(BasicLogicalPlanVisitor.java:133)
        at org.apache.tajo.engine.planner.global.GlobalPlanner$DistributedPlannerVisitor.visitRoot(GlobalPlanner.java:872)
        at org.apache.tajo.engine.planner.global.GlobalPlanner$DistributedPlannerVisitor.visitRoot(GlobalPlanner.java:867)
        at org.apache.tajo.engine.planner.BasicLogicalPlanVisitor.visit(BasicLogicalPlanVisitor.java:58)
        at org.apache.tajo.engine.planner.global.GlobalPlanner.build(GlobalPlanner.java:113)
        at org.apache.tajo.master.querymaster.QueryMasterTask.startQuery(QueryMasterTask.java:346)
        at org.apache.tajo.master.querymaster.QueryMasterTask.start(QueryMasterTask.java:167)
        at org.apache.tajo.master.querymaster.QueryMaster$QueryStartEventHandler.handle(QueryMaster.java:379)
        at org.apache.tajo.master.querymaster.QueryMaster$QueryStartEventHandler.handle(QueryMaster.java:371)
        at org.apache.tajo.master.TajoAsyncDispatcher.dispatch(TajoAsyncDispatcher.java:137)
        at org.apache.tajo.master.TajoAsyncDispatcher$1.run(TajoAsyncDispatcher.java:79)
        at java.lang.Thread.run(Thread.java:744)
{noformat}



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