Struct datafusion_optimizer::optimizer::Optimizer

pub struct Optimizer {
    pub rules: Vec<Arc<dyn OptimizerRule + Send + Sync>>,
}

A rule-based optimizer.

Fields

rules: Vec<Arc<dyn OptimizerRule + Send + Sync>>

All rules to apply

Implementations

impl Optimizer

pub fn new() -> Self

Create a new optimizer using the recommended list of rules

pub fn with_rules(rules: Vec<Arc<dyn OptimizerRule + Send + Sync>>) -> Self

Create a new optimizer with the given rules

pub fn optimize<F>( &self, plan: &LogicalPlan, config: &dyn OptimizerConfig, observer: F ) -> Result<LogicalPlan>where F: FnMut(&LogicalPlan, &dyn OptimizerRule),

Optimizes the logical plan by applying optimizer rules, and invoking observer function after each call

pub fn optimize_recursively( &self, rule: &Arc<dyn OptimizerRule + Send + Sync>, plan: &LogicalPlan, config: &dyn OptimizerConfig ) -> Result<Option<LogicalPlan>>

Use a rule to optimize the whole plan. If the rule with ApplyOrder, we don’t need to recursively handle children in rule.

Trait Implementations

impl Clone for Optimizer

fn clone(&self) -> Optimizer

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for Optimizer

fn default() -> Self

Returns the “default value” for a type.