[SPARK-25083] remove the type erasure hack in data source scan

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.0
• Component/s: SQL
• Target Version/s: 3.0.0
• Assignee: Unassigned
• Reporter: Wenchen Fan
• Created: 10/Aug/18 01:56
• Updated: 17/Mar/20 03:58
• Resolved: 17/Mar/20 03:58

Description

It's hacky to pretend a `RDD[ColumnarBatch]` to be a `RDD[InternalRow]`. We should make the type explicit.

Issue Links

• links to: [Github] Pull Request #22222 (xuanyuanking)
• links to: GitHub Pull Request #22222