Struct JoinSelection 

pub struct JoinSelection {}

The JoinSelection rule tries to modify a given plan so that it can accommodate infinite sources and optimize joins in the plan according to available statistical information, if there is any.

Implementations

impl JoinSelection

pub fn new() -> Self

Trait Implementations

impl Debug for JoinSelection

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

Formats the value using the given formatter.

impl Default for JoinSelection

fn default() -> JoinSelection

Returns the “default value” for a type.

impl PhysicalOptimizerRule for JoinSelection

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.