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PatternFeatures

oxirs_core::query::ml_optimizer

Struct PatternFeatures 

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pub struct PatternFeatures {
    pub pattern_count: usize,
    pub bound_variables: usize,
    pub unbound_variables: usize,
    pub avg_selectivity: f64,
    pub join_complexity: f64,
    pub max_join_depth: usize,
    pub filter_count: usize,
    pub has_property_paths: bool,
    pub has_unions: bool,
    pub has_optionals: bool,
}
Expand description

Query pattern features for ML prediction

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§pattern_count: usize

Number of triple patterns

§bound_variables: usize

Number of bound variables

§unbound_variables: usize

Number of unbound variables

§avg_selectivity: f64

Average selectivity estimate

§join_complexity: f64

Join graph complexity (edges / nodes)

§max_join_depth: usize

Maximum join depth

§filter_count: usize

Number of filter expressions

§has_property_paths: bool

Presence of property paths

§has_unions: bool

Presence of unions

§has_optionals: bool

Presence of optional patterns

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impl PatternFeatures

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pub const FEATURE_DIM: usize = 10

Feature dimension (number of features)

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pub fn to_vector(&self) -> Vec<f32>

Convert features to vector for ML processing

Trait Implementations§

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impl Clone for PatternFeatures

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fn clone(&self) -> PatternFeatures

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 PatternFeatures

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

Formats the value using the given formatter. Read more

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