[CALCITE-3473] Getting unique result for table scan should contain key column(s)

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.22.0
• Labels: pull-request-available
• Assignee: Wang Yanlin
• Reporter: Wang Yanlin
• Created: 04/Nov/19 08:24
• Updated: 06/Mar/20 04:35
• Resolved: 03/Dec/19 22:21

Description

Currently,  mq.getUniqueKeys() for TableScan returns empty.

However, for table with key column(s) defined, we can refer uniqueness on key column(s), so the result should contain key column(s)

Issue Links

• links to: GitHub Pull Request #1557