[SPARK-19420] Confusing error message when using outer join on two large tables

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Incomplete
• Affects Version/s: 2.1.0
• Component/s: SQL
• Labels: bulk-closed
• Assignee: Xiao Li
• Reporter: Xiao Li
• Created: 01/Feb/17 06:13
• Updated: 21/May/19 04:13
• Resolved: 21/May/19 04:13

Description

When users use the outer joins where both sides of the tables are too large to be broadcasted, Spark will still select `BroadcastNestedLoopJoin`. CROSS JOIN syntax is unable to cover the scenario of outer join, but we still issue the following error message:

Use the CROSS JOIN syntax to allow cartesian products between these relations

Issue Links

• links to: [Github] Pull Request #16762 (gatorsmile)