Gabriel39 opened a new pull request #8516:
URL: https://github.com/apache/incubator-doris/pull/8516


   # Proposed changes
   
   Related Issues:
   #8389 
   #8441 
   
   ## Problem Summary:
   
   This feature is propsoed in 
[DIP-1](https://cwiki.apache.org/confluence/display/DORIS/DSIP-001%3A+Java+UDF).
 This PR support fixed-length input and output Java UDF. Phase I in DIP-1 is 
done after this PR.
   
   To support Java UDF effeciently, I use no data copy in JNI call and all 
compute operations are off-heap in Java. To achieve that, I use a UdfExecutor 
instead. 
   
   For users, a UDF class must have a public evaluate method.
   
   ## Checklist(Required)
   
   1. Does it affect the original behavior: No
   2. Has unit tests been added: Yes
   3. Has document been added or modified: No Need
   4. Does it need to update dependencies: No
   5. Are there any changes that cannot be rolled back: No
   
   ## Further comments
   
   If this is a relatively large or complex change, kick off the discussion at 
[[email protected]](mailto:[email protected]) by explaining why you 
chose the solution you did and what alternatives you considered, etc...
   


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