Struct LimitPushdown

pub struct LimitPushdown {}

This rule inspects ExecutionPlan’s and pushes down the fetch limit from the parent to the child if applicable.

Implementations

impl LimitPushdown

pub fn new() -> Self

Trait Implementations

impl Debug for LimitPushdown

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

Formats the value using the given formatter.

impl Default for LimitPushdown

fn default() -> LimitPushdown

Returns the “default value” for a type.

impl PhysicalOptimizerRule for LimitPushdown

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 valid 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.