Struct SqpPlannerConfig 

pub struct SqpPlannerConfig {
    pub max_cache_size: usize,
    pub cost_model: SqpCostModel,
    pub enable_predicate_pushdown: bool,
    pub parallel_scans: u32,
    pub index_selectivity_threshold: f64,
    pub default_table_rows: u64,
    pub bytes_per_row: u64,
}

Configuration that drives planner behaviour.

Fields

max_cache_size: usize

Maximum number of plans kept in the plan cache.

cost_model: SqpCostModel

Cost model used when estimating plan costs.

enable_predicate_pushdown: bool

Whether predicates are pushed down into scans before projection.

parallel_scans: u32

Number of parallel scan threads to assume when estimating cost.

index_selectivity_threshold: f64

Index selectivity threshold below which an index scan is preferred. (0.0 = never use index, 1.0 = always use index when available)

default_table_rows: u64

Row count assumed for a full sequential scan of a table.

bytes_per_row: u64

Average bytes per row (used for I/O cost estimation).

Trait Implementations

impl Clone for SqpPlannerConfig

fn clone(&self) -> SqpPlannerConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SqpPlannerConfig

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

Formats the value using the given formatter.

impl Default for SqpPlannerConfig

fn default() -> Self

Returns the “default value” for a type.