[FLINK-25805] Use compact DataType serialization for default classes instead of internal ones

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.15.0
• Component/s: Table SQL / Planner
• Labels: pull-request-available
• Assignee: Timo Walther
• Reporter: Timo Walther
• Created: 25/Jan/22 10:30
• Updated: 27/Jan/22 14:42
• Resolved: 27/Jan/22 14:42

Description

It is more likely that default conversion classes spam the plan than internal classes. In most cases when internal classes are used, they usually also use logical type instead of data type. So it should be safer to skip default conversion classes. This also reduces the plan size for serializing `ResolvedSchema`.

Issue Links

• links to: GitHub Pull Request #18506
• links to: GitHub Pull Request #18533