interface postgres {
  use rdbms-types.{parameter-value, row-set, error};

  /// A connection to a postgres database.
  resource connection {
    /// Open a connection to the Postgres instance at `address`.
    open: static func(address: string) -> result<connection, error>;

    /// Query the database.
    query: func(statement: string, params: list<parameter-value>) -> result<row-set, error>;

    /// Execute command to the database.
    execute: func(statement: string, params: list<parameter-value>) -> result<u64, error>;
  }
}