JoinStatistics

oxirs_vec::oxirs_arq_integration

Struct JoinStatistics

pub struct JoinStatistics {
    pub total_joins: usize,
    pub algorithm_usage: HashMap<String, usize>,
    pub avg_cardinality: f64,
    pub selectivity_estimates: HashMap<String, f64>,
}

Expand description

Join operation statistics

Fields§

§total_joins: usize

Total joins performed

§algorithm_usage: HashMap<String, usize>

Join algorithm usage

§avg_cardinality: f64

Average join cardinality

§selectivity_estimates: HashMap<String, f64>

Join selectivity estimates

Trait Implementations§

impl Clone for JoinStatistics

fn clone(&self) -> JoinStatistics

Returns a duplicate of the value. Read more

1.0.0 · Source§

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

Performs copy-assignment from source. Read more

impl Debug for JoinStatistics

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

Formats the value using the given formatter. Read more

impl Default for JoinStatistics

fn default() -> JoinStatistics

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

Auto Trait Implementations§

impl Freeze for JoinStatistics

impl RefUnwindSafe for JoinStatistics

impl Send for JoinStatistics

impl Sync for JoinStatistics

impl Unpin for JoinStatistics

impl UnwindSafe for JoinStatistics

Blanket Implementations§

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

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