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https://issues.apache.org/jira/browse/TAJO-739?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
hyoungjunkim reassigned TAJO-739:
---------------------------------
Assignee: hyoungjunkim
> 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
> Assignee: 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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