slinkydeveloper commented on a change in pull request #18352: URL: https://github.com/apache/flink/pull/18352#discussion_r784660032
########## File path: docs/content/docs/dev/table/functions/udfs.md ########## @@ -240,7 +240,9 @@ An implementation class must extend from one of the available base classes (e.g. The class must be declared `public`, not `abstract`, and should be globally accessible. Thus, non-static inner or anonymous classes are not allowed. -For storing a user-defined function in a persistent catalog, the class must have a default constructor and must be instantiable during runtime. +For storing a user-defined function in a persistent catalog, the class must have a default constructor +and must be instantiable during runtime. Anonymous functions in Table API can only be persisted if the +function is not stateful (i.e. no non-transient fields). Review comment: and non static. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@flink.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org