[DRILL-2281] Drill never returns when we use aggregate functions after a join with an order by

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.0
• Component/s: Execution - Relational Operators
• Assignee: Abdel Hakim Deneche
• Reporter: Rahul Kumar Challapalli
• Created: 20/Feb/15 23:40
• Updated: 15/May/15 17:40
• Resolved: 15/May/15 17:40

Description

git.commit.id.abbrev=6676f2d

The below query never returns : (Order by seems to be the culprit)

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;

There seems to be constant activity in the drillbit.log file. The below message is continuously displayed in the log file

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]

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 :

 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;

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.