Data catalogs

Data catalog integrations for ClickHouse Cloud

ClickHouse Cloud can connect directly to your open table format data catalogs, giving you access to your data lake tables without duplicating data. Through the integration, your catalog’s tables will appear as queryable databases inside ClickHouse. Setup is available both via SQL command (DataLakeCatalog) and via the ClickHouse Cloud UI on the Data Sources tab.

Using the UI:

• Simplifies setup with a form using fields consistent with your Data Catalog objects
• Provides a single interface for active data catalog integrations
• Tests connections and credentials when saving

Name	Open Table Format Supported	Auth Method	Support	Version
AWS Glue Catalog	Iceberg	IAM/Access keys	Cloud & Core	25.10+
Lakekeeper	Iceberg	OAuth client credentials	Core	25.10+
Microsoft OneLake	Iceberg	Azure Active Directory (AAD)	Cloud & Core	25.12+
Nessie	Iceberg	OAuth client credentials	Core	25.10+
Polaris/Open Catalog	Iceberg	OAuth client credentials	Core	26.1+
REST catalog	Iceberg	OAuth client credentials, Bearer token	Cloud & Core	25.10+
Unity Catalog	Iceberg (UniForm-enabled and managed), Delta	OAuth client credentials	Cloud (Iceberg only) & Core	25.10+

We have more catalogs planned, including Horizon and S3 tables REST endpoint.