Struct postgres::CancelToken

pub struct CancelToken(/* private fields */);

Expand description

The capability to request cancellation of in-progress queries on a connection.

Implementations§

impl CancelToken

pub fn cancel_query<T>(&self, tls: T) -> Result<(), Error>
where T: MakeTlsConnect<Socket>,

Attempts to cancel the in-progress query on the connection associated with this CancelToken.

The server provides no information about whether a cancellation attempt was successful or not. An error will only be returned if the client was unable to connect to the database.

Cancellation is inherently racy. There is no guarantee that the cancellation request will reach the server before the query terminates normally, or that the connection associated with this token is still active.

Trait Implementations§

impl Clone for CancelToken

fn clone(&self) -> CancelToken

Returns a copy of the value. Read more

1.0.0 · source§

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

Performs copy-assignment from source. Read more

Auto Trait Implementations§

impl Freeze for CancelToken

impl RefUnwindSafe for CancelToken

impl Send for CancelToken

impl Sync for CancelToken

impl Unpin for CancelToken

impl UnwindSafe for CancelToken

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

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Gets the TypeId of self. Read more

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impl<T> CloneToUninit for T
where T: Clone,

default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dst. Read more

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Returns the argument unchanged.

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type Output = T

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where T: Clone,

type Owned = T

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type Error = Infallible

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impl<T, U> TryInto<U> for T
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type Error = <U as TryFrom<T>>::Error

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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

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