Aitozi opened a new pull request, #22455:
URL: https://github.com/apache/flink/pull/22455

   …g casting
   
   ## What is the purpose of the change
   
   Fix wrong serializer used when calling `toObject` for RawType.
   
   Before it will fails the cast with 
   
   
![image](https://user-images.githubusercontent.com/9486140/233818503-dea44202-3424-405f-91f8-8cb5e436dbed.png)
   
   
   ## Brief change log
   
   Return the inner serializer for `RawValueDataSerializer` when doing cast.
   
   
   ## Verifying this change
   
   CastRulesTest
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): (yes / no)
     - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: (yes / no)
     - The serializers: (yes / no / don't know)
     - The runtime per-record code paths (performance sensitive): (yes / no / 
don't know)
     - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / no / don't know)
     - The S3 file system connector: (yes / no / don't know)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (yes / no)
     - If yes, how is the feature documented? (not applicable / docs / JavaDocs 
/ not documented)
   


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