This is a self-contained demo using Materialize.com. This demo would show you how to use Materialize to join MySQL and Postgres in a live materialized view. For this demo, we are going to monitor the orders on our demo website and generate events that could, later on, be used to send notifications when a cart has been abandoned for a long time. The orders would be stored in a. database, Debezium streams the changes out of the database writes to a Redpanda topic. We would then ingest this. topic into Materialize directly along with users from the Postgres database. In Materialize we will join our orders and users together, do some filtering and create a materialized. view that. create a.