Currently, there isn't any direct documentation on using ClickHouse as a sink with RisingWave. However, a demo is in progress and is expected to be available later this month. In the meantime, if you have a specific use case, the solution team can work with you to connect RisingWave to your ClickHouse cluster. For persisting data to Delta/Iceberg, there is support and documentation available, as well as a demo for sinking to Iceberg. Ad hoc queries can be run directly on materialized views in RisingWave. For Delta Lake, the support is still under consideration, especially for the open-source version, as it is closely associated with Databricks.