Enum Query 

pub enum Query<D: Driver> {
    Raw(String),
    Prepared(D::Prepared),
}

A query ready to be executed by an Executor.

Represents either raw SQL (Raw) or a backend prepared statement (Prepared) carrying driver-specific caching / parsing state.

Variants

Raw(String)

Unprepared SQL text.

Prepared(D::Prepared)

Driver prepared handle.

Implementations

impl<D: Driver> Query<D>

pub fn run<'e, Exec: Executor<Driver = D>>( self, executor: &mut Exec, ) -> impl Stream<Item = Result<QueryResult>> + Send

Execute the query streaming heterogeneous QueryResult items.

pub fn fetch_one<Exec: Executor<Driver = D>>( self, executor: &mut Exec, ) -> impl Future<Output = Result<Option<RowLabeled>>> + Send

Fetch at most one labeled row.

pub fn fetch_many<Exec: Executor<Driver = D>>( self, executor: &mut Exec, ) -> impl Stream<Item = Result<RowLabeled>> + Send

Stream all labeled rows.

Trait Implementations

impl<D: Clone + Driver> Clone for Query<D>

where D::Prepared: Clone,

fn clone(&self) -> Query<D>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<D: Driver> Display for Query<D>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<D: Driver> From<&str> for Query<D>

fn from(value: &str) -> Self

Converts to this type from the input type.

impl<D, P> From<P> for Query<D>

where D: Driver<Prepared = P>, P: Prepared,

fn from(value: P) -> Self

Converts to this type from the input type.

impl<D: Driver> From<String> for Query<D>

fn from(value: String) -> Self

Converts to this type from the input type.