godfreyhe opened a new pull request #14878:
URL: https://github.com/apache/flink/pull/14878


   
   
   ## What is the purpose of the change
   
   *This pr aims to support StreamExecCalc json serialization/deserialization. 
now we can get json plan for sql like: select a, b from MyTable where c > 0, 
and execute the json plan.*
   
   
   ## Brief change log
   
     - *LogicalType's serializer and deserializer should consider empty 
Char/VarChar/Binary/VarBinary*
     - *Support RexNode and RelDataType json serialization/deserialization*
     - *Support StreamExecCalc json serialization/deserialization*
   
   
   ## Verifying this change
   
   
   This change added tests and can be verified as follows:
   
     - *Extended LogicalTypeSerdeTest test for empty 
Char/VarChar/Binary/VarBinary json serialization/deserialization*
     - *Added RelDataTypeSerdeTest to verify RelDataType json 
serialization/deserialization*
     - *Added RexNodeSerdeTest to verify RexNode json 
serialization/deserialization*
     - *Added CalcJsonPlanTest to verify the json plan of calc query, Added 
CalcJsonPlanITCase to execute the json plan of calc query.*
   
   ## 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/Mesos, 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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