Struct sqlx::query::QueryScalar [−][src]
#[must_use = "query must be executed to affect database"]pub struct QueryScalar<'q, DB, O, A> where
DB: Database, { /* fields omitted */ }
Expand description
Raw SQL query with bind parameters, mapped to a concrete type using FromRow
on (O,)
.
Returned from [query_scalar
].
Implementations
impl<'q, DB, O> QueryScalar<'q, DB, O, <DB as HasArguments<'q>>::Arguments> where
DB: Database,
[src]
impl<'q, DB, O> QueryScalar<'q, DB, O, <DB as HasArguments<'q>>::Arguments> where
DB: Database,
[src]pub fn bind<T>(
self,
value: T
) -> QueryScalar<'q, DB, O, <DB as HasArguments<'q>>::Arguments> where
T: 'q + Send + Encode<'q, DB> + Type<DB>,
[src]
pub fn bind<T>(
self,
value: T
) -> QueryScalar<'q, DB, O, <DB as HasArguments<'q>>::Arguments> where
T: 'q + Send + Encode<'q, DB> + Type<DB>,
[src]Bind a value for use with this SQL query.
See Query::bind
.
impl<'q, DB, O, A> QueryScalar<'q, DB, O, A> where
A: 'q + IntoArguments<'q, DB>,
O: Send + Unpin,
DB: Database,
(O,): Send,
(O,): Unpin,
(O,): for<'r> FromRow<'r, <DB as Database>::Row>,
[src]
impl<'q, DB, O, A> QueryScalar<'q, DB, O, A> where
A: 'q + IntoArguments<'q, DB>,
O: Send + Unpin,
DB: Database,
(O,): Send,
(O,): Unpin,
(O,): for<'r> FromRow<'r, <DB as Database>::Row>,
[src]pub fn fetch<'e, 'c, E>(
self,
executor: E
) -> Pin<Box<dyn Stream<Item = Result<O, Error>> + 'e + Send, Global>> where
'c: 'e,
'q: 'e,
A: 'e,
O: 'e,
DB: 'e,
E: 'e + Executor<'c, Database = DB>,
[src]
pub fn fetch<'e, 'c, E>(
self,
executor: E
) -> Pin<Box<dyn Stream<Item = Result<O, Error>> + 'e + Send, Global>> where
'c: 'e,
'q: 'e,
A: 'e,
O: 'e,
DB: 'e,
E: 'e + Executor<'c, Database = DB>,
[src]Execute the query and return the generated results as a stream.
pub fn fetch_many<'e, 'c, E>(
self,
executor: E
) -> Pin<Box<dyn Stream<Item = Result<Either<<DB as Database>::QueryResult, O>, Error>> + 'e + Send, Global>> where
'c: 'e,
'q: 'e,
A: 'e,
O: 'e,
DB: 'e,
E: 'e + Executor<'c, Database = DB>,
[src]
pub fn fetch_many<'e, 'c, E>(
self,
executor: E
) -> Pin<Box<dyn Stream<Item = Result<Either<<DB as Database>::QueryResult, O>, Error>> + 'e + Send, Global>> where
'c: 'e,
'q: 'e,
A: 'e,
O: 'e,
DB: 'e,
E: 'e + Executor<'c, Database = DB>,
[src]Execute multiple queries and return the generated results as a stream from each query, in a stream.
pub async fn fetch_all<'e, 'c, E>(
self,
executor: E
) -> Result<Vec<O, Global>, Error> where
'c: 'e,
'q: 'e,
A: 'e,
DB: 'e,
E: 'e + Executor<'c, Database = DB>,
(O,): 'e,
[src]
pub async fn fetch_all<'e, 'c, E>(
self,
executor: E
) -> Result<Vec<O, Global>, Error> where
'c: 'e,
'q: 'e,
A: 'e,
DB: 'e,
E: 'e + Executor<'c, Database = DB>,
(O,): 'e,
[src]Execute the query and return all the generated results, collected into a Vec
.
Trait Implementations
impl<'q, DB, O, A> Execute<'q, DB> for QueryScalar<'q, DB, O, A> where
A: Send + 'q + IntoArguments<'q, DB>,
O: Send,
DB: Database,
[src]
impl<'q, DB, O, A> Execute<'q, DB> for QueryScalar<'q, DB, O, A> where
A: Send + 'q + IntoArguments<'q, DB>,
O: Send,
DB: Database,
[src]pub fn statement(&self) -> Option<&<DB as HasStatement<'q>>::Statement>
[src]
pub fn statement(&self) -> Option<&<DB as HasStatement<'q>>::Statement>
[src]Gets the previously cached statement, if available.
pub fn take_arguments(&mut self) -> Option<<DB as HasArguments<'q>>::Arguments>
[src]
pub fn take_arguments(&mut self) -> Option<<DB as HasArguments<'q>>::Arguments>
[src]Returns the arguments to be bound against the query string. Read more
pub fn persistent(&self) -> bool
[src]
pub fn persistent(&self) -> bool
[src]Returns true
if the statement should be cached.
Auto Trait Implementations
impl<'q, DB, O, A> RefUnwindSafe for QueryScalar<'q, DB, O, A> where
A: RefUnwindSafe,
DB: RefUnwindSafe,
O: RefUnwindSafe,
<DB as HasStatement<'q>>::Statement: RefUnwindSafe,
A: RefUnwindSafe,
DB: RefUnwindSafe,
O: RefUnwindSafe,
<DB as HasStatement<'q>>::Statement: RefUnwindSafe,
impl<'q, DB, O, A> Send for QueryScalar<'q, DB, O, A> where
A: Send,
O: Send,
A: Send,
O: Send,
impl<'q, DB, O, A> Sync for QueryScalar<'q, DB, O, A> where
A: Sync,
DB: Sync,
O: Sync,
A: Sync,
DB: Sync,
O: Sync,
impl<'q, DB, O, A> Unpin for QueryScalar<'q, DB, O, A> where
A: Unpin,
DB: Unpin,
O: Unpin,
A: Unpin,
DB: Unpin,
O: Unpin,
impl<'q, DB, O, A> UnwindSafe for QueryScalar<'q, DB, O, A> where
A: UnwindSafe,
DB: UnwindSafe,
O: UnwindSafe,
<DB as HasStatement<'q>>::Statement: RefUnwindSafe,
A: UnwindSafe,
DB: UnwindSafe,
O: UnwindSafe,
<DB as HasStatement<'q>>::Statement: RefUnwindSafe,
Blanket Implementations
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T: ?Sized,
[src]
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T: ?Sized,
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[src]
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