Struct sqlx_core::pool::PoolConnection

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

A connection managed by a Pool.

Will be returned to the pool on-drop.

Implementations

impl<DB: Database> PoolConnection<DB>

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 min_connections is nonzero, a task will be spawned to replace this connection.

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

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

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

type Database = Postgres

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

fn acquire(self) -> BoxFuture<'c, Result<Self::Connection, Error>>

fn begin(self) -> BoxFuture<'c, Result<Transaction<'c, Postgres>, Error>>

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

type Database = Sqlite

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

fn acquire(self) -> BoxFuture<'c, Result<Self::Connection, Error>>

fn begin(self) -> BoxFuture<'c, Result<Transaction<'c, Sqlite>, Error>>

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

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

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

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

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

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

impl<DB: Database> Debug for PoolConnection<DB>

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

Formats the value using the given formatter.

impl<DB: Database> Deref for PoolConnection<DB>

type Target = <DB as Database>::Connection

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<DB: Database> DerefMut for PoolConnection<DB>

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

Mutably dereferences the value.

impl<DB: Database> Drop for PoolConnection<DB>

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<Postgres>

type Database = Postgres

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

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

fn fetch_optional<'e, 'q: 'e, E: 'q>(
    self,
    query: E
) -> BoxFuture<'e, Result<Option<PgRow>, Error>> where
    'c: 'e,
    E: Execute<'q, Postgres>, 

Execute the query and returns at most one row.

fn prepare_with<'e, 'q: 'e>(
    self,
    sql: &'q str,
    parameters: &'e [<Postgres as Database>::TypeInfo]
) -> BoxFuture<'e, Result<<Postgres 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.

fn execute<'e, 'q: 'e, E: 'q>(
    self,
    query: E
) -> BoxFuture<'e, Result<<Self::Database as Database>::QueryResult, Error>> where
    'c: 'e,
    E: Execute<'q, Self::Database>, 

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

fn execute_many<'e, 'q: 'e, E: 'q>(
    self,
    query: E
) -> BoxStream<'e, Result<<Self::Database as Database>::QueryResult, Error>> where
    'c: 'e,
    E: Execute<'q, Self::Database>, 

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

fn fetch<'e, 'q: 'e, E: 'q>(
    self,
    query: E
) -> BoxStream<'e, Result<<Self::Database as Database>::Row, Error>> where
    'c: 'e,
    E: Execute<'q, Self::Database>, 

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

fn fetch_all<'e, 'q: 'e, E: 'q>(
    self,
    query: E
) -> BoxFuture<'e, Result<Vec<<Self::Database as Database>::Row>, Error>> where
    'c: 'e,
    E: Execute<'q, Self::Database>, 

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

fn fetch_one<'e, 'q: 'e, E: 'q>(
    self,
    query: E
) -> BoxFuture<'e, Result<<Self::Database as Database>::Row, Error>> where
    'c: 'e,
    E: Execute<'q, Self::Database>, 

Execute the query and returns exactly one row.

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.

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

type Database = Sqlite

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

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

fn fetch_optional<'e, 'q: 'e, E: 'q>(
    self,
    query: E
) -> BoxFuture<'e, Result<Option<SqliteRow>, Error>> where
    'c: 'e,
    E: Execute<'q, Sqlite>, 

Execute the query and returns at most one row.

fn prepare_with<'e, 'q: 'e>(
    self,
    sql: &'q str,
    parameters: &'e [<Sqlite as Database>::TypeInfo]
) -> BoxFuture<'e, Result<<Sqlite 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.

fn execute<'e, 'q: 'e, E: 'q>(
    self,
    query: E
) -> BoxFuture<'e, Result<<Self::Database as Database>::QueryResult, Error>> where
    'c: 'e,
    E: Execute<'q, Self::Database>, 

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

fn execute_many<'e, 'q: 'e, E: 'q>(
    self,
    query: E
) -> BoxStream<'e, Result<<Self::Database as Database>::QueryResult, Error>> where
    'c: 'e,
    E: Execute<'q, Self::Database>, 

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

fn fetch<'e, 'q: 'e, E: 'q>(
    self,
    query: E
) -> BoxStream<'e, Result<<Self::Database as Database>::Row, Error>> where
    'c: 'e,
    E: Execute<'q, Self::Database>, 

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

fn fetch_all<'e, 'q: 'e, E: 'q>(
    self,
    query: E
) -> BoxFuture<'e, Result<Vec<<Self::Database as Database>::Row>, Error>> where
    'c: 'e,
    E: Execute<'q, Self::Database>, 

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

fn fetch_one<'e, 'q: 'e, E: 'q>(
    self,
    query: E
) -> BoxFuture<'e, Result<<Self::Database as Database>::Row, Error>> where
    'c: 'e,
    E: Execute<'q, Self::Database>, 

Execute the query and returns exactly one row.

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.