Enum deadpool_postgres::config::RecyclingMethod [−][src]
pub enum RecyclingMethod { Fast, Verified, Clean, Custom(String), }
Expand description
This enum is used to control how the connection is recycled.
Attention: The current default is Verified
but will be changed
to Fast
in the next minor release of deadpool-postgres
. Please
make sure to explicitly state this if you want to keep using the
Verified
recycling method.
Variants
Only run Client::is_closed
when recycling existing connections.
Unless you have special needs this is a safe choice.
Run Client::is_closed
and execute a test query. This is slower
but guarantees that the database connection is ready to be used.
Normally Client::is_closed
should be enough to filter out bad
connections but under some circumstances (i.e. hard-closed
network connections) it is possible that Client::is_closed
returns
false
but the connection is dead. You will receive an error on
your first query then.
Like Verified
query method but instead use the following sequence of
statements which guarantees a prestine connection:
CLOSE ALL; SET SESSION AUTHORIZATION DEFAULT; RESET ALL; UNLISTEN *; SELECT pg_advisory_unlock_all(); DISCARD TEMP; DISCARD SEQUENCES;
This is similar to calling DISCARD ALL
but does not call
DEALLOCATE ALL
and DISCARD PLAN
so that the statement cache
is not rendered ineffective.
Custom(String)
Like Verified
but allows to specify a custom SQL to be executed.
Implementations
impl RecyclingMethod
[src]
impl RecyclingMethod
[src]Trait Implementations
impl Clone for RecyclingMethod
[src]
impl Clone for RecyclingMethod
[src]fn clone(&self) -> RecyclingMethod
[src]
fn clone(&self) -> RecyclingMethod
[src]Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
fn clone_from(&mut self, source: &Self)
1.0.0[src]Performs copy-assignment from source
. Read more
impl Debug for RecyclingMethod
[src]
impl Debug for RecyclingMethod
[src]impl Default for RecyclingMethod
[src]
impl Default for RecyclingMethod
[src]impl<'de> Deserialize<'de> for RecyclingMethod
[src]
impl<'de> Deserialize<'de> for RecyclingMethod
[src]fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
[src]
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
[src]Deserialize this value from the given Serde deserializer. Read more
impl PartialEq<RecyclingMethod> for RecyclingMethod
[src]
impl PartialEq<RecyclingMethod> for RecyclingMethod
[src]fn eq(&self, other: &RecyclingMethod) -> bool
[src]
fn eq(&self, other: &RecyclingMethod) -> bool
[src]This method tests for self
and other
values to be equal, and is used
by ==
. Read more
fn ne(&self, other: &RecyclingMethod) -> bool
[src]
fn ne(&self, other: &RecyclingMethod) -> bool
[src]This method tests for !=
.
impl StructuralPartialEq for RecyclingMethod
[src]
Auto Trait Implementations
impl RefUnwindSafe for RecyclingMethod
impl Send for RecyclingMethod
impl Sync for RecyclingMethod
impl Unpin for RecyclingMethod
impl UnwindSafe for RecyclingMethod
Blanket Implementations
impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]
impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]pub fn borrow_mut(&mut self) -> &mut T
[src]
pub fn borrow_mut(&mut self) -> &mut T
[src]Mutably borrows from an owned value. Read more
impl<T> Same<T> for T
impl<T> Same<T> for T
type Output = T
type Output = T
Should always be Self
impl<T> ToOwned for T where
T: Clone,
[src]
impl<T> ToOwned for T where
T: Clone,
[src]type Owned = T
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
[src]
pub fn to_owned(&self) -> T
[src]Creates owned data from borrowed data, usually by cloning. Read more
pub fn clone_into(&self, target: &mut T)
[src]
pub fn clone_into(&self, target: &mut T)
[src]🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
pub fn vzip(self) -> V
impl<T> DeserializeOwned for T where
T: for<'de> Deserialize<'de>,
[src]
T: for<'de> Deserialize<'de>,