[TAJO-410] A query with a combination of general and distinct aggregation functions fails

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.8.0
• Component/s: Planner/Optimizer
• Assignee: Hyunsik Choi
• Reporter: Hyunsik Choi
• Created: 11/Dec/13 09:08
• Updated: 12/Dec/13 19:56
• Resolved: 11/Dec/13 09:38

Description

select 
    l_orderkey, 
    count(*) as cnt, 
    count(distinct l_linenumber) as unique_key 
from 
    lineitem
group by 
    l_orderkey;

The above query causes the following error:

/tajo-localdir/q_1386667006044_0002/output
2013-12-10 18:33:48,792 ERROR querymaster.QueryUnitAttempt (QueryUnitAttempt.java:transition(293)) - FROM  >> java.lang.Arrayy
IndexOutOfBoundsException: 0
        at org.apache.tajo.storage.VTuple.get(VTuple.java:97)
        at org.apache.tajo.engine.function.builtin.CountRows.merge(CountRows.java:54)
        at org.apache.tajo.engine.eval.AggregationFunctionCallEval.eval(AggregationFunctionCallEval.java:65)
        at org.apache.tajo.engine.planner.physical.SortAggregateExec.next(SortAggregateExec.java:57)
        at org.apache.tajo.engine.planner.physical.StoreTableExec.next(StoreTableExec.java:84)
        at org.apache.tajo.worker.Task.run(Task.java:358)
        at org.apache.tajo.worker.TaskRunner$1.run(TaskRunner.java:376)
        at java.lang.Thread.run(Thread.java:662)

2013-12-10 18:33:48,792 INFO  event.DefaultTaskSchedulerEvent (DefaultTaskScheduler.java:handle(233)) - TaskRequest: container_138666700
06044_0002_01_000188,eb_1386667006044_0002_000002
2013-12-10 18:33:48,792 INFO  querymaster.QueryUnit (QueryUnit.java:transition(433)) -