Connection Pool

To obtain a database connection, use the Database interface:

let db: DatabaseConnection = Database::connect("protocol://username:password@host/database").await?;

protocol can be mysql:, postgres: or sqlite:.

host is usually localhost, a domain name or an IP address.

Under the hood, a sqlx::Pool is created and owned by DatabaseConnection.

Each time you call execute or query_one/all on it, a connection will be acquired and released from the pool.

Multiple queries will execute in parallel as you await on them.

Connect Options

To configure the connection, use the ConnectOptions interface:

let mut opt = ConnectOptions::new("protocol://username:password@host/database".to_owned());
opt.max_connections(100)
    .min_connections(5)
    .connect_timeout(Duration::from_secs(8))
    .idle_timeout(Duration::from_secs(8))
    .max_lifetime(Duration::from_secs(8))
    .sqlx_logging(true);

let db = Database::connect(opt).await?;

To configure the underlying SQLite database use SQLite's URI Filenames. As an example, to open a database for read and write, creating the database if it is missing, we would specify sqlite://data.db?mode=rwc.