[FLINK-25769] Add internal functions and basic function versioning

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.15.0
• Component/s: Table SQL / API, Table SQL / Planner
• Labels: pull-request-available
• Assignee: Timo Walther
• Reporter: Timo Walther
• Created: 24/Jan/22 07:42
• Updated: 25/Jan/22 17:08
• Resolved: 25/Jan/22 16:30

Description

As mentioned in FLIP-190:

We keep the old function definition around under an internal name. The physical plan after restore might look similar to:

== Optimized Physical Plan ==
Calc(select=[$TO_TIMESTAMP_LTZ$1(f0)])

$TO_TIMESTAMP_LTZ$1 has been returned by the ModuleManager.

Issue Links

• links to: GitHub Pull Request #18464