[SPARK-46777] Refactor `StreamingDataSourceRelation` into `StreamingDataSourceRelation` and `StreamingDataSourceScanRelation` for parity with batch scan

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Fix Version/s: 4.0.0
• Component/s: SQL, Structured Streaming
• Labels: pull-request-available
• Assignee: Jackie Zhang
• Reporter: Jackie Zhang
• Created: 19/Jan/24 18:18
• Updated: 22/Jan/24 09:59
• Resolved: 22/Jan/24 09:59

Description

To prepare for the incoming structured streaming operator pushdown, we'd like to refactor some catalyst object relationships first.

Issue Links

• links to: GitHub Pull Request #44818