> ## Documentation Index
> Fetch the complete documentation index at: https://docs.firebolt.io/llms.txt
> Use this file to discover all available pages before exploring further.

> Reference and syntax for the USE ENGINE command.

# USE ENGINE

Changes the client to direct queries against the specified engine.

The client can be updated to direct queries against the system engine by using `system` for the `engine_name`.

Changing the engine used by the client will reset the user's session.

## Syntax

```sql theme={"theme":{"light":"github-light","dark":"github-dark"}}
USE ENGINE <engine_name>
```

## Parameters

| Parameter       | Description                        |
| :-------------- | :--------------------------------- |
| `<engine_name>` | The name of the engine to be used. |

## Example 1

The following example changes the client to use my\_engine:

```sql theme={"theme":{"light":"github-light","dark":"github-dark"}}
USE ENGINE my_engine
```

## Example 2

The following example changes the client to use system:

```sql theme={"theme":{"light":"github-light","dark":"github-dark"}}
USE ENGINE system
```