Struct CommonSubexpressionStats 

pub struct CommonSubexpressionStats {
    pub hits: u64,
    pub misses: u64,
    pub unsafe_rejections: u64,
    pub rejection_reasons: Vec<String>,
}

Runtime common subexpression elimination telemetry.

Fields

hits: u64

Number of safe subplan cache hits.

misses: u64

Number of safe subplans evaluated and inserted into the cache.

unsafe_rejections: u64

Number of subplans rejected because they cross an unsafe boundary.

rejection_reasons: Vec<String>

Rejection reason labels observed during the current executor lifetime.

Trait Implementations

impl Clone for CommonSubexpressionStats

fn clone(&self) -> CommonSubexpressionStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CommonSubexpressionStats

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

Formats the value using the given formatter.

impl Default for CommonSubexpressionStats

fn default() -> CommonSubexpressionStats

Returns the “default value” for a type.

impl PartialEq for CommonSubexpressionStats

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for CommonSubexpressionStats

impl StructuralPartialEq for CommonSubexpressionStats