Hi Flink devs, Quick question: Why does *TableEnvironmentImpl#*TemporarySystemFunction* doesn't offer an API with *ignoreIfExists* - basically to support idempotent registration of UDF functions unlike createFunction that offers an API with *ignoreExists?*
Want to understand if there is any nuance to it that I'm missing or is it simply just a new API that needs to be added? Side question: does re-registration of a same UDF function can cause inconsistent behavior in terms of classloading that fails with "Caused by: org.apache.flink.table.api.ValidationException: Invalid argument type at position 0. Data type X expected but X passed." Is this a different manifestation of the same X cannot be cast to X exception <https://nightlies.apache.org/flink/flink-docs-master/docs/ops/debugging/debugging_classloading/#x-cannot-be-cast-to-x-exceptions> ? Regards Venkata krishnan
