Struct PlanCacheKey 

pub struct PlanCacheKey { /* private fields */ }

Identifies a cached plan evaluation by the content ids of its request and plan.

Two evaluations collide in the plan cache only when both the request and the plan hash to the same ContentId, so the same plan run against different requests (or different plans for the same request) stay distinct entries.

Implementations

impl PlanCacheKey

pub fn new(request_content_id: ContentId, plan_content_id: ContentId) -> Self

Returns a key built directly from precomputed request and plan content ids.

pub fn for_request_plan(request: &Expr, plan: &Expr) -> Result<Self>

Returns the key derived by hashing the request and plan expressions.

pub fn request_content_id(&self) -> &ContentId

Returns the content id of the request portion of the key.

pub fn plan_content_id(&self) -> &ContentId

Returns the content id of the plan portion of the key.

pub fn to_expr(&self) -> Expr

Returns the key as a map expression with request and plan content ids.

Trait Implementations

impl Clone for PlanCacheKey

fn clone(&self) -> PlanCacheKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PlanCacheKey

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

Formats the value using the given formatter.

impl Eq for PlanCacheKey

impl Ord for PlanCacheKey

fn cmp(&self, other: &PlanCacheKey) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for PlanCacheKey

fn eq(&self, other: &PlanCacheKey) -> 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 PartialOrd for PlanCacheKey

fn partial_cmp(&self, other: &PlanCacheKey) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for PlanCacheKey