pub struct PoolConnection<DB: Database> { /* private fields */ }
Expand description

A connection managed by a Pool.

Will be returned to the pool on-drop.

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impl<DB: Database> PoolConnection<DB>

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pub fn release(self) -> DB::Connection

👎Deprecated: renamed to .detach() for clarity

Explicitly release a connection from the pool

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pub fn detach(self) -> DB::Connection

Detach this connection from the pool, allowing it to open a replacement.

Note that if your application uses a single shared pool, this effectively lets the application exceed the max_connections setting.

If you want the pool to treat this connection as permanently checked-out, use .leak() instead.

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pub fn leak(self) -> DB::Connection

Detach this connection from the pool, treating it as permanently checked-out.

This effectively will reduce the maximum capacity of the pool by 1 every time it is used.

If you don’t want to impact the pool’s capacity, use .detach() instead.

Trait Implementations§

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impl<'c> Acquire<'c> for &'c mut PoolConnection<MySql>

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impl<DB: Database> AsMut<<DB as Database>::Connection> for PoolConnection<DB>

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fn as_mut(&mut self) -> &mut DB::Connection

Converts this type into a mutable reference of the (usually inferred) input type.
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impl<DB: Database> AsRef<<DB as Database>::Connection> for PoolConnection<DB>

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fn as_ref(&self) -> &DB::Connection

Converts this type into a shared reference of the (usually inferred) input type.
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impl<DB: Database> Debug for PoolConnection<DB>

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

Formats the value using the given formatter. Read more
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impl<DB: Database> Deref for PoolConnection<DB>

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type Target = <DB as Database>::Connection

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.
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impl<DB: Database> DerefMut for PoolConnection<DB>

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fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.
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impl<DB: Database> Drop for PoolConnection<DB>

Returns the connection to the Pool it was checked-out from.

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fn drop(&mut self)

Executes the destructor for this type. Read more
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impl<'c> Executor<'c> for &'c mut PoolConnection<MySql>

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type Database = MySql

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fn fetch_many<'e, 'q: 'e, E>( self, query: E ) -> BoxStream<'e, Result<Either<<MySql as Database>::QueryResult, MySqlRow>, Error>>
where E: Execute<'q, MySql> + 'q, 'c: 'e,

Execute multiple queries and return the generated results as a stream from each query, in a stream.
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fn fetch_optional<'e, 'q: 'e, E>( self, query: E ) -> BoxFuture<'e, Result<Option<MySqlRow>, Error>>
where E: Execute<'q, MySql> + 'q, 'c: 'e,

Execute the query and returns at most one row.
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fn prepare_with<'e, 'q: 'e>( self, sql: &'q str, parameters: &'e [<MySql as Database>::TypeInfo] ) -> BoxFuture<'e, Result<<MySql as HasStatement<'q>>::Statement, Error>>
where 'c: 'e,

Prepare the SQL query, with parameter type information, to inspect the type information about its parameters and results. Read more
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fn execute<'e, 'q: 'e, E>( self, query: E ) -> BoxFuture<'e, Result<<Self::Database as Database>::QueryResult, Error>>
where E: Execute<'q, Self::Database> + 'q, 'c: 'e,

Execute the query and return the total number of rows affected.
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fn execute_many<'e, 'q: 'e, E>( self, query: E ) -> BoxStream<'e, Result<<Self::Database as Database>::QueryResult, Error>>
where E: Execute<'q, Self::Database> + 'q, 'c: 'e,

Execute multiple queries and return the rows affected from each query, in a stream.
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fn fetch<'e, 'q: 'e, E>( self, query: E ) -> BoxStream<'e, Result<<Self::Database as Database>::Row, Error>>
where E: Execute<'q, Self::Database> + 'q, 'c: 'e,

Execute the query and return the generated results as a stream.
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fn fetch_all<'e, 'q: 'e, E>( self, query: E ) -> BoxFuture<'e, Result<Vec<<Self::Database as Database>::Row>, Error>>
where E: Execute<'q, Self::Database> + 'q, 'c: 'e,

Execute the query and return all the generated results, collected into a Vec.
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fn fetch_one<'e, 'q: 'e, E>( self, query: E ) -> BoxFuture<'e, Result<<Self::Database as Database>::Row, Error>>
where E: Execute<'q, Self::Database> + 'q, 'c: 'e,

Execute the query and returns exactly one row.
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fn prepare<'e, 'q: 'e>( self, query: &'q str ) -> BoxFuture<'e, Result<<Self::Database as HasStatement<'q>>::Statement, Error>>
where 'c: 'e,

Prepare the SQL query to inspect the type information of its parameters and results. Read more

Auto Trait Implementations§

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impl<DB> !RefUnwindSafe for PoolConnection<DB>

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impl<DB> Send for PoolConnection<DB>

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impl<DB> Sync for PoolConnection<DB>
where <DB as Database>::Connection: Sync,

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impl<DB> Unpin for PoolConnection<DB>
where <DB as Database>::Connection: Unpin,

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impl<DB> !UnwindSafe for PoolConnection<DB>

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V