<https://stackoverflow.com/posts/75087307/timeline>
I'm interested in doing a "lookup join" or "enrichment join" against a "changelog stream" read by "upsert-kafka". I am wondering if this is possible against the table API. I found https://github.com/fhueske/flink-sql-demo#enrichment-join-against-temporal-table however when I read up on https://nightlies.apache.org/flink/flink-docs-master/docs/dev/table/concepts/temporal_table_function/ it says that it does not work on changelog inputs. Then it appears that I specifically can't perform the "enrichment join". Is there a technique I am missing? Is there a reason why we should not perform the join that I am missing?
