[FLINK-16161] Statistics zero should be unknown in HiveCatalog

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.10.0
• Fix Version/s: 1.10.1, 1.11.0
• Component/s: Connectors / Hive
• Labels: pull-request-available
• Assignee: Jingsong Lee
• Reporter: Jingsong Lee
• Created: 19/Feb/20 09:04
• Updated: 25/Feb/20 01:34
• Resolved: 24/Feb/20 11:31

Description

In hive, treat statistics zero as unknown, but in Flink HiveCatalog, treat zero as real value.

This lead wrong inputs to CBO.

Previous discussed in https://github.com/apache/flink/pull/10380

Issue Links

• links to: GitHub Pull Request #11199