beyond1920 opened a new pull request #8261: [FLINK-12307][table-planner-blink] 
Support translation from StreamExecWindowJoin to StreamTransformation.
URL: https://github.com/apache/flink/pull/8261
 
 
   ## What is the purpose of the change
   
   Support translation from StreamExecWindowJoin to StreamTransformation.
   
   ## Brief change log
   
     - Introduce ProcTimeBoundedStreamJoin and RowTimeBoundedStreamJoin to 
handle intervalJoin.
     - Introduce KeyedCoProcessOperatorWithWatermarkDelay that supports holding 
back watermarks with a static delay.
     - StreamExecWindowJoin implements StreamExecNode.
     - Introduce FlinkJoinType in runtime module to replace original 
FlinkJoinRelType in plan module. Delete SortMergeJoinType in 
SortMergeJoinOperator. 
   
   
   ## Verifying this change
   
    UT & IT
   
   ## 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, Yarn/Mesos, ZooKeeper: (no)
     - The S3 file system connector: (no)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (no)

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