Struct AdaptiveConfig 

pub struct AdaptiveConfig {
    pub enabled: bool,
    pub threshold: f64,
    pub min_rows: u64,
    pub max_reoptimizations: usize,
}

Configuration for adaptive query execution.

Adaptive execution monitors actual row counts during query processing and can trigger re-optimization when estimates are significantly wrong.

Fields

enabled: bool

Whether adaptive execution is enabled.

threshold: f64

Deviation threshold that triggers re-optimization.

A value of 3.0 means re-optimization is triggered when actual cardinality is more than 3x or less than 1/3x the estimated value.

min_rows: u64

Minimum number of rows before considering re-optimization.

Helps avoid thrashing on small result sets.

max_reoptimizations: usize

Maximum number of re-optimizations allowed per query.

Implementations

impl AdaptiveConfig

pub fn disabled() -> Self

Creates a disabled adaptive config.

pub fn with_threshold(self, threshold: f64) -> Self

Sets the deviation threshold.

pub fn with_min_rows(self, min_rows: u64) -> Self

Sets the minimum rows before re-optimization.

pub fn with_max_reoptimizations(self, max: usize) -> Self

Sets the maximum number of re-optimizations.

Trait Implementations

impl Clone for AdaptiveConfig

fn clone(&self) -> AdaptiveConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AdaptiveConfig

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

Formats the value using the given formatter.

impl Default for AdaptiveConfig

fn default() -> Self

Returns the “default value” for a type.