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.
Postgres
Add Postgres as an external catalog in Altertable for unified analytics. Query across Postgres and other sources with the federated query engine.Supabase
Add Supabase as an external catalog in Altertable for unified analytics using Transaction Pooler. Query and analyze data across Supabase and other sources.MySQL
Add MySQL as an external catalog for federated analytics. Query MySQL alongside other sources through Altertable's SQL engine.MariaDB
Add MariaDB as an external catalog in Altertable for unified analytics. Query across MariaDB and other sources with federated query engine.BigQuery
Add BigQuery as an external catalog in Altertable for unified analytics. Configure service account credentials and required roles to query BigQuery data.Snowflake
Add Snowflake as an external catalog in Altertable for unified analytics across your data sources.Redshift
Add Amazon Redshift as an external catalog in Altertable for unified analytics. Query and analyze data across Redshift and other sources with federated queries.ClickHouse
Add ClickHouse as an external catalog in Altertable for federated analytics.DuckDB
Connect an existing DuckDB database file from object storage as an external catalog for federated queries in Altertable.Bucket Tables
Map files in a connected bucket to external tables in Altertable.Iceberg Tables
Map existing Iceberg tables in a connected bucket to external tables in Altertable.R2 Data Catalog
Connect Cloudflare R2 Data Catalog to Altertable as an Iceberg REST catalog.S3 Tables
Connect Amazon S3 Tables to Altertable as an Iceberg REST catalog.AWS Glue
Connect AWS Glue Data Catalog to Altertable for querying Iceberg tables.