type Sql: AsRef<str>
type ParamsPostgres: AsRef<[&'__query (dyn ToSql + Sync)]>
type ParamsSQLite: AsRef<[&'__query dyn ToSql]>
fn sql_postgres(&'__query self) -> Self::Sql
fn sql_sqlite(&'__query self) -> Self::Sql
fn params_postgres(&'__query self) -> Self::ParamsPostgres
fn params_sqlite(&'__query self) -> Self::ParamsSQLite