[IMPALA-912] Planner generates redundant hash exprs for data stream senders

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 1.3
• Fix Version/s: Impala 1.3.1
• Assignee: Alexander Behm
• Reporter: Nong Li
• Created: 20/Mar/14 23:29
• Updated: 18/Apr/14 20:53
• Resolved: 18/Apr/14 20:53

Description

TPCH-Q18 will generate plans where there is a redundant hash expr on the exchange nodes.

e.g.

 |--11:EXCHANGE [PARTITION=HASH(o.o_orderkey,o.o_orderkey)]
 |     hosts=10 per-host-mem=0B
 |     tuple-ids=1 row-size=50B cardinality=150000000