Enum PoolingMode 

pub enum PoolingMode {
    Session,
    Transaction,
    Statement,
}

Connection pooling mode

Determines when connections are returned to the pool.

Variants

Session

Session mode: 1:1 client-to-backend mapping

Connection is held for the entire client session lifetime. This is the safest mode, compatible with all PostgreSQL features.

Transaction

Transaction mode: Return connection after transaction ends

Connection is returned to the pool after COMMIT or ROLLBACK. Provides good connection sharing while maintaining transaction integrity. Server-side prepared statements may need re-creation on new connections.

Statement

Statement mode: Return connection after each statement

Most aggressive connection sharing - returns after every statement. Cannot use server-side prepared statements. Best for simple queries where maximum connection sharing is desired.

Implementations

impl PoolingMode

pub fn supports_prepared_statements(&self) -> bool

Returns whether this mode supports server-side prepared statements

pub fn description(&self) -> &'static str

Returns a human-readable description

pub fn from_str_lossy(s: &str) -> Self

Parse from string (case-insensitive)

Trait Implementations

impl Clone for PoolingMode

fn clone(&self) -> PoolingMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PoolingMode

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

Formats the value using the given formatter.

impl Default for PoolingMode

fn default() -> PoolingMode

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for PoolingMode

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for PoolingMode

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

Formats the value using the given formatter.

impl From<PoolingModeHint> for PoolingMode

Available on crate feature pool-modes only.

fn from(hint: PoolingModeHint) -> Self

Converts to this type from the input type.

impl Hash for PoolingMode

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for PoolingMode

fn eq(&self, other: &PoolingMode) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for PoolingMode

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for PoolingMode

impl Eq for PoolingMode

impl StructuralPartialEq for PoolingMode