Struct SqpIndexStat

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pub struct SqpIndexStat {
    pub name: String,
    pub cardinality: u64,
    pub selectivity: f64,
    pub usage_count: u64,
    pub registered_at_ns: u64,
    pub referencing_queries: Vec<u64>,
}

Expand description

Runtime statistics about a registered index.

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§name: String

Human-readable name of the index.

§cardinality: u64

Number of distinct values in the indexed column.

§selectivity: f64

Fraction of rows matched by a typical equality predicate (0.0–1.0).

§usage_count: u64

How many times this index has been used in a chosen plan.

§registered_at_ns: u64

Timestamp of registration (nanoseconds).

§referencing_queries: Vec<u64>

Which query fingerprints reference this index.

Trait Implementations§

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impl Clone for SqpIndexStat

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fn clone(&self) -> SqpIndexStat

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

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impl Debug for SqpIndexStat

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl UnwindSafe for SqpIndexStat

Blanket Implementations§

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impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,

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impl<T> Any for T
where T: 'static + ?Sized,

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where T: ?Sized,

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fn borrow(&self) -> &T

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fn borrow_mut(&mut self) -> &mut T

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

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impl<T> From<T> for T

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fn instrument(self, span: Span) -> Instrumented<Self>

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Calls U::from(self).

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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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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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