[SPARK-49085] Remove special casing for Protobuf functions in Connect

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Fix Version/s: 4.0.0
• Component/s: Connect, SQL
• Labels: pull-request-available
• Epic Link: Unified SQL Scala Interface
• Assignee: Haejoon Lee
• Reporter: Herman van Hövell
• Created: 01/Aug/24 20:09
• Updated: 12/Sep/24 01:07
• Resolved: 05/Sep/24 04:26

Description

Tasks to perform:

• Remove the special casing from the connect planner.
• Register the protobuf functions under system.internal using session extensions.
• Add the needed constructors to the protobuf expressions.
• Update protobuf functions and make them use unresolved function path

Issue Links

• links to: GitHub Pull Request #47885
• links to: GitHub Pull Request #48051
• links to: GitHub Pull Request #48080