Lakehouse
External Catalogs
External Catalogs
External catalogs connect your existing systems to Altertable, making them queryable alongside your Altertable catalogs and other data sources.
For network-restricted database-style catalogs, Altertable can also connect through an SSH tunnel. Configure the bastion host while creating the catalog, then copy the generated public key from the catalog details page into the SSH server's authorized_keys.
PostgresAdd Postgres as an external catalog in Altertable for unified analytics. Query across Postgres and other sources with the federated query engine.SupabaseAdd Supabase as an external catalog in Altertable for unified analytics using Transaction Pooler. Query and analyze data across Supabase and other sources.MySQLAdd MySQL as an external catalog for federated analytics. Query MySQL alongside other sources through Altertable's SQL engine.MariaDBAdd MariaDB as an external catalog in Altertable for unified analytics. Query across MariaDB and other sources with federated query engine.BigQueryAdd BigQuery as an external catalog in Altertable for unified analytics. Configure service account credentials and required roles to query BigQuery data.SnowflakeAdd Snowflake as an external catalog in Altertable so teams can query warehouse data with lakehouse analytics.RedshiftAdd Amazon Redshift as an external catalog in Altertable for unified analytics. Query and analyze data across Redshift and other sources with federated queries.DuckDBConnect an existing DuckDB database file from object storage as an external catalog for federated queries in Altertable.Bucket TablesMap files in a connected bucket to external Altertable tables and query object storage data from the lakehouse.Iceberg TablesMap existing Iceberg tables in connected object storage to external tables in Altertable for unified lakehouse queries.R2 Data CatalogConnect Cloudflare R2 Data Catalog to Altertable as an Iceberg REST catalog for open, governed lakehouse analytics.S3 TablesConnect Amazon S3 Tables to Altertable as an Iceberg REST catalog for managed, open-table lakehouse analytics.AWS GlueConnect AWS Glue Data Catalog to Altertable so teams can query Iceberg tables through a shared lakehouse foundation.