Struct ProjectionPushdown

pub struct ProjectionPushdown {}

This rule inspects ProjectionExec’s in the given physical plan and tries to remove or swap with its child.

Implementations

impl ProjectionPushdown

pub fn new() -> Self

Trait Implementations

impl Debug for ProjectionPushdown

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

Formats the value using the given formatter.

impl Default for ProjectionPushdown

fn default() -> ProjectionPushdown

Returns the “default value” for a type.

impl PhysicalOptimizerRule for ProjectionPushdown

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.