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From "Rahul Challapalli (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-2281) Drill never returns when we use aggregate functions after a join with an order by
Date Fri, 20 Feb 2015 23:41:13 GMT
Rahul Challapalli created DRILL-2281:
----------------------------------------

             Summary: Drill never returns when we use aggregate functions after a join with
an order by
                 Key: DRILL-2281
                 URL: https://issues.apache.org/jira/browse/DRILL-2281
             Project: Apache Drill
          Issue Type: Bug
          Components: Execution - Relational Operators
            Reporter: Rahul Challapalli
            Assignee: Chris Westin


git.commit.id.abbrev=6676f2d

The below query never returns : (Order by seems to be the culprit)
{code}
create view v1 as select uid, flatten(events) event from `data.json`;
create view v2 as select uid, flatten(transactions) transaction from `data.json`;
select v1.uid, MAX(v2.transaction.amount), MIN(v1.event.event_time) from v1 inner join v2
on v1.uid = v2.uid where v2.transaction.trans_time < 0 group by v1.uid order by v1.uid;
{code}

There seems to be constant activity in the drillbit.log file. The below message is continuously
displayed in the log file
{code}
2015-02-20 23:35:04,450 [2b183b65-4551-bb9a-35ca-b71b9eedc4d6:frag:1:2] INFO  o.a.d.exec.vector.BaseValueVector
- Realloc vector null. [32768] -> [65536]
2015-02-20 23:35:04,451 [2b183b65-4551-bb9a-35ca-b71b9eedc4d6:frag:1:2] INFO  o.a.d.exec.vector.BaseValueVector
- Realloc vector null. [32768] -> [65536]
2015-02-20 23:35:04,451 [2b183b65-4551-bb9a-35ca-b71b9eedc4d6:frag:1:2] INFO  o.a.d.exec.vector.BaseValueVector
- Realloc vector null. [32768] -> [65536]
{code}

Drill returns correct data when we remove one of the agg functions or use multiple aggs from
the same side of the join. The below queries work :
{code}
 select v1.uid, MAX(v2.transaction.amount) from v1 inner join v2 on v1.uid = v2.uid where
v2.transaction.trans_time < 0 group by v1.uid order by v1.uid;

 select v1.uid, MAX(v2.transaction.amount), MAX(v2.transaction.amount) from v1 inner join
v2 on v1.uid = v2.uid where v2.transaction.trans_time < 0 group by v1.uid order by v1.uid;
{code}

Attached the dataset which contains 2 records. I copied over the same 2 records 50000 times
and ran the queries on the data set. Let me know if you need anything else.



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