[DRILL-1617] Disable ProducerConsumer

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.7.0
• Assignee: Unassigned
• Reporter: Steven Phillips
• Created: 30/Oct/14 21:37
• Updated: 09/Dec/14 17:47
• Resolved: 12/Nov/14 00:37

Description

This operator causes incorrect query results:

0: jdbc:drill:schema=dfs.par100> alter session set `planner.add_producer_consumer` = true;
----------------------+

ok

summary

----------------------+

true	planner.add_producer_consumer updated.

----------------------+
1 row selected (0.053 seconds)
0: jdbc:drill:schema=dfs.par100> select count(l_orderkey) from lineitem;
------------

EXPR$0

------------

600037902

------------
1 row selected (0.212 seconds)
0: jdbc:drill:schema=dfs.par100> select count(l_orderkey) from lineitem where 1 = 1;
------------

EXPR$0

------------

569114624

------------
1 row selected (2.163 seconds)
0: jdbc:drill:schema=dfs.par100> alter session set `planner.add_producer_consumer` = false;
----------------------+

ok

summary

----------------------+

true	planner.add_producer_consumer updated.

----------------------+
1 row selected (0.046 seconds)
0: jdbc:drill:schema=dfs.par100> select count(l_orderkey) from lineitem where 1 = 1;
------------

EXPR$0

------------

600037902

------------
1 row selected (2.657 seconds)

As an immediate fix, we should disable this operator.