[HIVE-19202] CBO failed due to NullPointerException in HiveAggregate.isBucketedInput()

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.1.1
• Fix Version/s: 4.0.0-alpha-1
• Component/s: CBO
• Assignee: zhuwei
• Reporter: zhuwei
• Created: 13/Apr/18 10:09
• Updated: 17/Nov/22 08:55
• Resolved: 17/Apr/18 04:35

Description

I ran a query with join and group by with below settings, COB failed due to NullPointerException in HiveAggregate.isBucketedInput()

set hive.execution.engine=tez;

set hive.cbo.costmodel.extended=true;

 

In class HiveRelMdDistribution, we implemented below functions:

public RelDistribution distribution(HiveAggregate aggregate, RelMetadataQuery mq)

public RelDistribution distribution(HiveJoin join, RelMetadataQuery mq)

 

But in HiveAggregate.isBucketedInput, the argument passed to distribution is "this.getInput()"

, obviously it's not right here. The right argument needed is "this"