> For the complete documentation index, see [llms.txt](https://docs.e6data.com/query-engine/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.e6data.com/query-engine/guides/catalogs.md).

# Catalogs

e6data connects to an external catalog to discover the databases, schemas, tables, columns, and storage locations available for querying.

You can connect multiple catalogs to a workspace and configure which catalogs each e6data cluster can access.

## Supported catalog types

<table><thead><tr><th>Catalog</th><th data-hidden>Best for</th></tr></thead><tbody><tr><td><a href="/query-engine/guides/catalogs/hive-metastore.md">Hive Metastore</a></td><td>Existing Hadoop/Spark deployments and OSS Iceberg tables</td></tr><tr><td><a href="/query-engine/guides/catalogs/aws-glue-catalog.md">AWS Glue</a></td><td>AWS-native data lakes using Glue Data Catalog</td></tr><tr><td><a href="/query-engine/guides/catalogs/unity-catalog.md">Databricks Unity</a></td><td>Workspaces standardized on Databricks Unity</td></tr><tr><td><a href="/query-engine/guides/catalogs/apache-polaris.md">Apache Polaris</a></td><td>Snowflake Polaris-managed Iceberg catalogs</td></tr><tr><td><a href="/query-engine/guides/catalogs/microsoft-fabric.md">Microsoft Fabric</a></td><td>OneLake-managed data in Microsoft Fabric</td></tr><tr><td><a href="/query-engine/guides/catalogs/iceberg-rest-catalog.md">Iceberg REST</a></td><td>Lakekeeper, Tabular, Nessie REST, Gravitino, or any spec-compliant REST server</td></tr><tr><td><a href="/query-engine/guides/catalogs/amazon-s3-tables.md">Amazon S3 Tables</a></td><td>AWS S3 Tables (managed Iceberg tables)</td></tr></tbody></table>

## In this section

* [Register and manage catalogs](/query-engine/guides/catalogs/register-and-manage-catalogs.md) - the common create flow, plus refresh, edit, delete, and scheduled refresh.
* [Cross-account access](/query-engine/guides/catalogs/cross-account.md) - connect to metastores or data in a different cloud account.
* [Troubleshooting catalogs](/query-engine/guides/catalogs/troubleshooting-catalogs.md) - common connection and refresh errors.

##


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