Struct sqlx::pool::PoolConnection

pub struct PoolConnection<DB>
where
    DB: Database,
{ /* private fields */ }

A connection managed by a Pool.

Will be returned to the pool on-drop.

Implementations

impl<DB> PoolConnection<DB>

where DB: Database,

pub fn release(self) -> <DB as Database>::Connection

👎Deprecated: renamed to .detach() for clarity

Explicitly release a connection from the pool

pub fn detach(self) -> <DB as Database>::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.

pub fn leak(self) -> <DB as Database>::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

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

type Database = MySql

type Connection = &'c mut <MySql as Database>::Connection

fn acquire( self ) -> Pin<Box<dyn Future<Output = Result<<&'c mut PoolConnection<MySql> as Acquire<'c>>::Connection, Error>> + Send + 'c>>

fn begin( self ) -> Pin<Box<dyn Future<Output = Result<Transaction<'c, MySql>, Error>> + Send + 'c>>

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

where DB: Database,

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

Converts this type into a mutable reference of the (usually inferred) input type.

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

where DB: Database,

fn as_ref(&self) -> &<DB as Database>::Connection

Converts this type into a shared reference of the (usually inferred) input type.

impl<DB> Debug for PoolConnection<DB>

where DB: Database,

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

Formats the value using the given formatter.

impl<DB> Deref for PoolConnection<DB>

where DB: Database,

type Target = <DB as Database>::Connection

The resulting type after dereferencing.

fn deref(&self) -> &<PoolConnection<DB> as Deref>::Target

Dereferences the value.

impl<DB> DerefMut for PoolConnection<DB>

where DB: Database,

fn deref_mut(&mut self) -> &mut <PoolConnection<DB> as Deref>::Target

Mutably dereferences the value.

impl<DB> Drop for PoolConnection<DB>

where DB: Database,

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

fn drop(&mut self)

Executes the destructor for this type.

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

type Database = MySql

fn fetch_many<'e, 'q, E>( self, query: E ) -> Pin<Box<dyn Stream<Item = Result<Either<<MySql as Database>::QueryResult, MySqlRow>, Error>> + Send + 'e>>

where 'q: 'e, 'c: 'e, E: 'q + Execute<'q, MySql>,

Execute multiple queries and return the generated results as a stream from each query, in a stream.

fn fetch_optional<'e, 'q, E>( self, query: E ) -> Pin<Box<dyn Future<Output = Result<Option<MySqlRow>, Error>> + Send + 'e>>

where 'q: 'e, 'c: 'e, E: 'q + Execute<'q, MySql>,

Execute the query and returns at most one row.

fn prepare_with<'e, 'q>( self, sql: &'q str, parameters: &'e [<MySql as Database>::TypeInfo] ) -> Pin<Box<dyn Future<Output = Result<<MySql as HasStatement<'q>>::Statement, Error>> + Send + 'e>>

where 'q: 'e, 'c: 'e,

Prepare the SQL query, with parameter type information, to inspect the type information about its parameters and results.

fn execute<'e, 'q, E>( self, query: E ) -> Pin<Box<dyn Future<Output = Result<<Self::Database as Database>::QueryResult, Error>> + Send + 'e>>

where 'q: 'e, 'c: 'e, E: 'q + Execute<'q, Self::Database>,

Execute the query and return the total number of rows affected.

fn execute_many<'e, 'q, E>( self, query: E ) -> Pin<Box<dyn Stream<Item = Result<<Self::Database as Database>::QueryResult, Error>> + Send + 'e>>

where 'q: 'e, 'c: 'e, E: 'q + Execute<'q, Self::Database>,

Execute multiple queries and return the rows affected from each query, in a stream.

fn fetch<'e, 'q, E>( self, query: E ) -> Pin<Box<dyn Stream<Item = Result<<Self::Database as Database>::Row, Error>> + Send + 'e>>

where 'q: 'e, 'c: 'e, E: 'q + Execute<'q, Self::Database>,

Execute the query and return the generated results as a stream.

fn fetch_all<'e, 'q, E>( self, query: E ) -> Pin<Box<dyn Future<Output = Result<Vec<<Self::Database as Database>::Row>, Error>> + Send + 'e>>

where 'q: 'e, 'c: 'e, E: 'q + Execute<'q, Self::Database>,

Execute the query and return all the generated results, collected into a Vec.

fn fetch_one<'e, 'q, E>( self, query: E ) -> Pin<Box<dyn Future<Output = Result<<Self::Database as Database>::Row, Error>> + Send + 'e>>

where 'q: 'e, 'c: 'e, E: 'q + Execute<'q, Self::Database>,

Execute the query and returns exactly one row.

fn prepare<'e, 'q>( self, query: &'q str ) -> Pin<Box<dyn Future<Output = Result<<Self::Database as HasStatement<'q>>::Statement, Error>> + Send + 'e>>

where 'q: 'e, 'c: 'e,

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