[SPARK-23203] DataSourceV2 should use immutable trees.

• Type: Sub-task
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.4.0
• Component/s: SQL
• Assignee: Ryan Blue
• Reporter: Ryan Blue
• Created: 24/Jan/18 18:42
• Updated: 20/Feb/18 08:05
• Resolved: 20/Feb/18 08:05

Description

The DataSourceV2 integration doesn't use immutable trees, which is a basic requirement of Catalyst. The v2 relation should not wrap a mutable reader and change the logical plan by pushing projections and filters.

Issue Links

• links to: [Github] Pull Request #20387 (rdblue)
• links to: [Github] Pull Request #20448 (cloud-fan)