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CardinalityEstimator

graphos_engine::query::optimizer::cardinality

Struct CardinalityEstimator 

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pub struct CardinalityEstimator { /* private fields */ }
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Cardinality estimator.

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impl CardinalityEstimator

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pub fn new() -> Self

Creates a new cardinality estimator with default settings.

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pub fn add_table_stats(&mut self, name: &str, stats: TableStats)

Adds statistics for a table/label.

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pub fn set_avg_fanout(&mut self, fanout: f64)

Sets the average edge fanout.

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pub fn estimate(&self, op: &LogicalOperator) -> f64

Estimates the cardinality of a logical operator.

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impl Default for CardinalityEstimator

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fn default() -> Self

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

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

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const ALIGN: usize

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type Init = T

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unsafe fn init(init: <T as Pointable>::Init) -> usize

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type Error = Infallible

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