[SPARK-30671] SparkSession emptyDataFrame should not create an RDD

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.4
• Fix Version/s: 3.0.0
• Component/s: SQL
• Assignee: Herman van Hövell
• Reporter: Herman van Hövell
• Created: 29/Jan/20 21:57
• Updated: 12/Dec/22 18:10
• Resolved: 31/Jan/20 07:14

Description

SparkSession.emptyDataFrame uses an empty RDD in the background. This is a bit of a pity because the optimizer can't recognize this as being empty and it won't apply things like PropagateEmptyRelation.

Issue Links

• links to: GitHub Pull Request #27400