> ## 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.

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

## Syntax

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

## Parameters

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

## Example

The following example changes the client to use `my_engine`:

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