Register the parallelizable UDR

When you register a UDR with the PARALLELIZABLE routine modifier, you tell the database server that the UDR was written according to the guidelines in Write the parallelizable UDR. That is, the UDR does not call any DataBlade API functions that are non-PDQ-threadsafe. However, registering the UDR with the PARALLELIZABLE modifier does not guarantee that every invocation of the UDR executes in parallel. The decision whether to parallelize a query and any accompanying UDRs is made when the query is parsed and optimized.