[FLINK-14903] Relax structured types constraints

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.10.0
• Component/s: Table SQL / API
• Labels: pull-request-available
• Assignee: Timo Walther
• Reporter: Timo Walther
• Created: 21/Nov/19 15:02
• Updated: 26/Nov/19 10:35
• Resolved: 26/Nov/19 10:35

Description

As mentioned in FLIP-65:

In order to allow type extraction of structured types that are not registered in a catalog, we need to relax the structured type concept to "inline or anonymous structured types" that are not identified by an object identifier in a catalog but the fully qualified implementation class.

In order to support case classes and immutable types, we relax the constraint of enforcing a default constructor by the alternative of having a constructor that fully assigns all fields (same parameter names and types). Because we are already using code generation, the implementation of creating instances even without a default constructor is relatively easy.

Issue Links

• links to: GitHub Pull Request #10307