[SPARK-20941] Subquery Reuse does not work

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2.0
• Fix Version/s: 2.2.0
• Component/s: SQL
• Target Version/s: 2.2.0
• Assignee: Xiao Li
• Reporter: Xiao Li
• Created: 31/May/17 22:11
• Updated: 01/Jun/17 22:57
• Resolved: 01/Jun/17 22:57

Description

• Subquery reuse does not work.
• It is sharing the same `SQLConf` (`spark.sql.exchange.reuse`) with the one for Exchange Reuse.
• No test case covers the rule Subquery reuse.

Issue Links

• links to: [Github] Pull Request #18169 (gatorsmile)