Struct WcojFallbackStats 

pub struct WcojFallbackStats {
    pub chain: u64,
    pub dedicated_multiway: u64,
    pub free_join: u64,
    pub planned_hash: u64,
    pub factorized_delta: u64,
    pub groupby_fusion: u64,
}

Counts of actual fallbacks taken after a WCOJ-family dispatch attempt.

These counters are recorded at the execution boundary, not at individual eligibility checks. One attempted route therefore contributes at most one fallback count before the ordinary execution path runs.

Fields

chain: u64

Two-relation chain specialization declined.

dedicated_multiway: u64

A dedicated triangle, cycle, or clique route declined.

free_join: u64

A general Free Join route declined.

planned_hash: u64

The planner explicitly selected the captured hash route.

factorized_delta: u64

Factorized recursive-delta execution declined to the ordinary delta path.

groupby_fusion: u64

Fused group-by execution declined to materialize-then-aggregate.

Implementations

impl WcojFallbackStats

pub fn total(self) -> u64

Total number of WCOJ-family fallbacks actually executed.

pub fn saturating_add_assign(&mut self, other: Self)

Accumulate another execution’s counters without overflowing.

Trait Implementations

impl Clone for WcojFallbackStats

fn clone(&self) -> WcojFallbackStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for WcojFallbackStats

impl Debug for WcojFallbackStats

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

Formats the value using the given formatter.

impl Default for WcojFallbackStats

fn default() -> WcojFallbackStats

Returns the “default value” for a type.

impl Eq for WcojFallbackStats

impl PartialEq for WcojFallbackStats

fn eq(&self, other: &WcojFallbackStats) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for WcojFallbackStats