Enum PlanFallback 

pub enum PlanFallback {
    None,
    VisitedBudget,
    EfWidened,
    CandidateShortfall,
}

A named fallback recorded by the planner.

Variants

None

No fallback was required.

VisitedBudget

Filtered traversal crossed its independent selectivity budget.

EfWidened

A caller-supplied ef was raised to compensate for selectivity.

CandidateShortfall

Corrective ef widening exhausted before retaining the requested rows.

Trait Implementations

impl Clone for PlanFallback

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for PlanFallback

impl Debug for PlanFallback

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

Formats the value using the given formatter.

impl Eq for PlanFallback

impl PartialEq for PlanFallback

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for PlanFallback