Function create_async_runtime 

pub fn create_async_runtime() -> Result<Runtime, CreateRuntimeError>

Create a Tokio async runtime

Use this runtime to run async code in block mode. Run blocked code is required by Postgres callback functions which is fine because Postgres process is single-threaded.

For example,

let rt = create_async_runtime()?;

// client.query() is an async function returning a Result
match rt.block_on(client.query(&sql)) {
    Ok(result) => { }
    Err(err) => { }
}