> ## Documentation Index > Fetch the complete documentation index at: https://docs.hightouch.com/llms.txt > Use this file to discover all available pages before exploring further. # Trino > Trino is an open-source distributed SQL query engine designed to query large data sets distributed over one or more heterogeneous data sources. ## Get started Hightouch lets you pull data stored in [TrinoDB](https://trino.io/) (previously PrestoSQL) and push it to downstream destinations. Most of the setup occurs in the Hightouch UI, but you need access to your Trino instance for information like your host, port, database name, and credentials. Hightouch can also connect to managed Trino services like Starburst. > [!NOTE] > > You may need to allowlist Hightouch's IP addresses to let our systems connect to your warehouse. Reference our [networking docs](https://docs.hightouch.com/security/networking#ip-addresses) to determine which IP addresses you need to allowlist. ## Connection configuration To get started, go to the [**Sources** overview page](https://app.hightouch.com/sources?from=docs) and click the **Add source** button. Select **Trino** and follow the steps below. ### Choose connection type Hightouch can connect directly to Trino over the public internet or via an SSH tunnel. Since data is encrypted in transit via TLS, a direct connection is suitable for most use cases. You may need to set up a tunnel if your Trino instance is on a private network or virtual private cloud (VPC). ![Direct connection vs. SSH tunnel](https://mintcdn.com/hightouch-3c037897/L_vQfA0JQEpeGUUo/images/get-started/connection-types-comparison.png?fit=max\&auto=format\&n=L_vQfA0JQEpeGUUo\&q=85\&s=2300535707894b1f08608939cac812b2) Hightouch supports both standard and reverse SSH tunnels. To learn more about SSH tunneling, refer to Hightouch's [tunneling documentation](https://docs.hightouch.com/security/ssh-tunneling.md). ### Configure your source Enter the following fields into Hightouch: * **Host**: The hostname or IP address of your Trino coordinator server. * **Port**: The port number of your Trino coordinator server. * (Optional) **Default catalog**: This specifies the catalog that will be used when Hightouch executes queries in Trino. * **Engine**: Select whether to use the Trino or Presto engine to execute queries. * **Connector**: Select the connector that will be used to access the data source used by the sync engine. We support the following connectors: * Hive * Iceberg * PostgreSQL * (Optional) **Disable encryption**: Encryption is enabled by default. Check this option if your Trino instance doesn't support encrypted connections. ### Choose your sync engine For optimal performance, Hightouch [tracks incremental changes](https://docs.hightouch.com/getting-started/concepts.md#change-data-capture) in your data model—such as added, changed, or removed rows—and only syncs those records. You can choose between two different sync engines for this work. The **Basic engine** requires read-only access to Trino. Hightouch executes a query in your database, reads all query results, and then determines incremental changes using Hightouch's infrastructure. This engine is easier to set up since it requires read—not write—access to Trino. The **Lightning engine** requires read and write access to Trino. The engine stores previously synced data in a separate schema in Trino managed by Hightouch. In other words, the engine uses Trino to track incremental changes to your data rather than performing these calculations in Hightouch. Therefore, these computations are completed more quickly. ![Standard vs Lightning engine comparison](https://mintcdn.com/hightouch-3c037897/L_vQfA0JQEpeGUUo/images/get-started/sync-engine-comparison.png?fit=max\&auto=format\&n=L_vQfA0JQEpeGUUo\&q=85\&s=1202b36c58e475d85344db87dde2c825) > [!TIP] > > Hightouch recommends using the Lightning sync engine when syncing more than 100,000 rows of data. If you select the Basic engine, you can switch to the Lightning engine later. Once you've configured the Lightning engine, you can't move back to the Basic engine without recreating Trino as a source. To learn more, including migration steps and tips, check out the [Lightning sync engine docs](https://docs.hightouch.com/syncs/lightning-sync-engine.md). #### Basic versus Lightning engine comparison | Criteria | Basic sync engine | Lightning sync engine | | - | - | - | | Performance | Slower | Quicker | | Ideal for large data models (over 100 thousand rows) | No | Yes | | Reliability | Normal | High | | Resilience to sync interruptions | Normal | High | | Extra features | None | Warehouse Sync Logs, Match Booster, Identity Resolution | | Ease of setup | Simpler | More involved | | Location of change data capture | Hightouch infrastructure | Trino schemas managed by Hightouch | | Required permissions in Trino | Read-only | Read and write | | Ability to switch | You can move to the Lightning engine at any time | You can't move to the Basic engine once Lightning is configured | #### Lightning engine setup To set up the Lightning engine, you need to grant Hightouch write access to your Trino connector. The steps to do so depend on the connector. These snippets serve as a reference and should be run on your Trino server. **Hive & Iceberg** ```sql theme={null} CREATE SCHEMA IF NOT EXISTS .hightouch_audit; CREATE SCHEMA IF NOT EXISTS .hightouch_planner; ``` **PostgreSQL** ```sql theme={null} CREATE USER hightouch_user WITH PASSWORD '********'; CREATE SCHEMA IF NOT EXISTS .hightouch_audit; CREATE SCHEMA IF NOT EXISTS .hightouch_planner; GRANT CREATE, USAGE ON SCHEMA .hightouch_audit TO hightouch_user; GRANT CREATE, USAGE ON SCHEMA .hightouch_planner TO hightouch_user; ``` The snippet provisions two schemas (`hightouch_planner` and `hightouch_audit`) for storing logs of previously synced data and, in some cases, creates a dedicated SQL user. Hightouch must be able to read and write to these schemas, but the specific username and schema names might vary. ### Provide credentials Enter the following fields into Hightouch: * **User**: This can be your personal Trino login or a dedicated user for Hightouch. At minimum, this user must have read access to the data you wish to sync. If using the Lightning sync engine, you must also grant this user additional permissions as described above. * **Password**: The password for the user specified above. ## Test your connection When setting up a source for the first time, Hightouch validates the following: * Network connectivity * Trino credentials * Permission to list schemas and tables * Permission to write to `hightouch_planner` schema * Permission to write to `hightouch_audit` schema All configurations must pass the first three, while those with the Lightning engine must pass all of them. Some sources may initially fail connection tests due to timeouts. Once a connection is established, subsequent API requests should happen more quickly, so it's best to retry tests if they first fail. You can do this by clicking **Test again**. If you've retried the tests and verified your credentials are correct but the tests are still failing, don't hesitate to [reach out to our Customer Success team](#pylon-chat). ## Create models Once your source configuration has passed the necessary validation, your source setup is complete. Next, you can set up [models](https://docs.hightouch.com/getting-started/concepts.md#models) to define which data you want to pull from Trino. The Trino source supports these modeling methods: * writing a query in [the SQL editor](https://docs.hightouch.com/models/sql-editor.md) * using the visual [table selector](https://docs.hightouch.com/models/table-selector.md) * leveraging existing [dbt models](https://docs.hightouch.com/extensions/dbt-models.md) You may also want to consider [storing sync logs](https://docs.hightouch.com/syncs/warehouse-sync-logs.md) in Trino. Like using the Lightning sync engine versus the standard one, this feature lets you use Trino instead of Hightouch infrastructure. Rather than performance gains, it makes your sync log data available for more complex analysis. Refer to the [warehouse sync logs docs](https://docs.hightouch.com/syncs/warehouse-sync-logs.md) to learn more. > [!NOTE] > > You must enable the [Lightning sync engine](#choose-your-sync-engine) to store sync logs in your warehouse. ## Data types Hightouch supports all built-in [Trino data types](https://trino.io/docs/current/language/types.html). Custom data types provided by plugins are represented as strings. ## Tips and troubleshooting If you run into an issue this page doesn't cover, [contact support](#pylon-chat).