Struct DepthSchedulingRule 

pub struct DepthSchedulingRule { /* private fields */ }

Physical optimizer rule that prunes operators based on depth scheduling.

The rule walks the physical plan tree and, for queries classified as Simple or Medium, removes expensive operators that would not improve result quality significantly. This achieves the 60%+ latency reduction target for Simple queries.

Implementations

impl DepthSchedulingRule

pub fn new() -> Self

pub fn with_complexity(complexity: Complexity) -> Self

Create a rule with a forced complexity level (for testing or DEPTH FULL/SUMMARY).

Trait Implementations

impl Debug for DepthSchedulingRule

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

Formats the value using the given formatter.

impl Default for DepthSchedulingRule

fn default() -> DepthSchedulingRule

Returns the “default value” for a type.

impl PhysicalOptimizerRule for DepthSchedulingRule

fn optimize( &self, plan: Arc<dyn ExecutionPlan>, _config: &ConfigOptions, ) -> Result<Arc<dyn ExecutionPlan>>

Rewrite plan to an optimized form

fn name(&self) -> &str

A human readable name for this optimizer rule

fn schema_check(&self) -> bool

A flag to indicate whether the physical planner should validate that the rule will not change the schema of the plan after the rewriting. Some of the optimization rules might change the nullable properties of the schema and should disable the schema check.