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PathStatistics

oxirs_arq::path_extensions

Struct PathStatistics 

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pub struct PathStatistics {
    pub avg_cardinality: f64,
    pub avg_eval_time_us: f64,
    pub evaluation_count: u64,
    pub selectivity: f64,
    pub last_updated: Instant,
}
Expand description

Statistics for a property path

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§avg_cardinality: f64

Average result cardinality

§avg_eval_time_us: f64

Average evaluation time in microseconds

§evaluation_count: u64

Number of times this path was evaluated

§selectivity: f64

Selectivity (ratio of results to candidates)

§last_updated: Instant

Last update timestamp

Trait Implementations§

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impl Clone for PathStatistics

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fn clone(&self) -> PathStatistics

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for PathStatistics

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

Formats the value using the given formatter. Read more
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impl Default for PathStatistics

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fn default() -> Self

Returns the “default value” for a type. Read more

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Immutably borrows from an owned value. Read more
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fn borrow_mut(&mut self) -> &mut T

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impl<T> CloneToUninit for T
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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const ALIGN: usize

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type Init = T

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impl<T> PolicyExt for T
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fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow only if self and other return Action::Follow. Read more
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where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more
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type Output = T

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fn to_subset(&self) -> Option<SS>

The inverse inclusion map: attempts to construct self from the equivalent element of its superset. Read more
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fn is_in_subset(&self) -> bool

Checks if self is actually part of its subset T (and can be converted to it).
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fn to_subset_unchecked(&self) -> SS

Use with care! Same as self.to_subset but without any property checks. Always succeeds.
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fn from_subset(element: &SS) -> SP

The inclusion map: converts self to the equivalent element of its superset.
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type Owned = T

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fn vzip(self) -> V

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