liyang1206 opened a new pull request, #26892:
URL: https://github.com/apache/flink/pull/26892

   ## What is the purpose of the change
   
   Implementing 
[FLINK-36377](https://issues.apache.org/jira/browse/FLINK-36377) for supporting 
ROW, ARRAY, MAP, and RAW types for LAST_VALUE aggregate function. 
   
   
   ## Brief change log
   
     - Modify the AggFunctionFactory to ensure that the creation of the 
LAST_VALUE function supports ROW, ARRAY, MAP, and RAW types.
     - Modify the LastValueAggFunction and LastValueWithRetractAggFunction to 
support copying of complex data type arguments and remove the original handling 
of StringData
   
   
   ## Verifying this change
   
   This change added tests and can be verified as follows:
   
   - Added  test in AggregateITCase to validate ROW, MAP, ARRAY in LAST_VALUE
   - Added unit test for applying LAST_VALUE for ROW in 
LastValueAggFunctionWithOrderTest, LastValueAggFunctionWithoutOrderTest, 
LastValueWithRetractAggFunctionWithOrderTest and 
LastValueWithRetractAggFunctionWithoutOrderTest
   - Added unit test for applying LAST_VALUE for ROW and ARRAY in 
GroupAggregateHarnessTest
   
   ## 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): yes
     - 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? yes
     - If yes, how is the feature documented? docs
   


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