xuyangzhong opened a new pull request, #23505:
URL: https://github.com/apache/flink/pull/23505

   ## What is the purpose of the change
   
   This pull request aims to introduce the support of the session window tvf in 
the plan. After this pr, users can use the syntax with session window tvf with 
SQL.
   
   Note: this pr is not related to table-runtime.
   
   The session window tvf only has the basic features  like those described in 
https://issues.apache.org/jira/browse/FLINK-23544 .
   
   ## Brief change log
   
     - adapt the requirement about ptf in calcite: full the table 
characteristic of the session window tvf.
     - adapt some rules about introducing session window tvf.
     - add ut and it cases for it.
   
   
   ## Verifying this change
   
   Some ut and it cases are added to verify this pr.
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): no
     - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: no
     - The serializers: no
     - The runtime per-record code paths (performance sensitive): no
     - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
     - The S3 file system connector: no
   
   ## Documentation
   
     - Does this pull request introduce a new feature? no
     - If yes, how is the feature documented? no
   


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