[DRILL-6755] HashJoin should not build hash tables when probe side is empty.

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.15.0
• Labels: ready-to-commit
• Assignee: Boaz Ben-Zvi
• Reporter: Timothy Farkas
• Reviewer: Timothy Farkas
• Created: 21/Sep/18 21:38
• Updated: 31/Jan/19 21:57
• Resolved: 01/Oct/18 12:37

Description

Currently when doing an Inner or a Right join we still build hashtables when the probe side is empty. A performance optimization would be to not build them.

Issue Links

• links to: GitHub Pull Request #1480