Struct ParameterScopes 

pub struct ParameterScopes<T> { /* private fields */ }

Values remain owned by the host; SQL decides which assignment lifetime restores them.

Implementations

impl<T> ParameterScopes<T>

pub fn session_assignment(&mut self, name: &str)

A session assignment supersedes pending LOCAL and function configuration restoration for this parameter.

pub fn enter_function(&mut self) -> ParameterScope

pub fn leave_function(&mut self, scope: ParameterScope) -> BTreeMap<String, T>

pub fn assigned( &mut self, name: String, previous: T, action: ParameterAssignment, in_transaction: bool, ) -> Option<T>

Record a successful assignment. An out-of-transaction LOCAL returns its immediate restoration value.

pub fn finish_transaction(&mut self) -> BTreeMap<String, T>

pub fn reset_all(&mut self)

RESET ALL overrides ordinary settings while leaving both authorization parameters alone.

Trait Implementations

impl<T: Clone> Clone for ParameterScopes<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T> Default for ParameterScopes<T>

fn default() -> Self

Returns the “default value” for a type.