ClickHouse has a solid Iceberg integration. It has an Iceberg table function[0] and Iceberg table engine[1] for interacting with Iceberg data stored in s3, gcs, azure, hadoop etc.
oh and now the developer reopened it because it is not actually fully complete, lol. Yep, Iceburg on Clickhouse is WIP. I am actively watching this because it is relevant for my company.
https://github.com/ClickHouse/ClickHouse/issues/52054