Struct datafusion_optimizer::common_subexpr_eliminate::CommonSubexprEliminate

pub struct CommonSubexprEliminate {}

Perform Common Sub-expression Elimination optimization.

Currently only common sub-expressions within one logical plan will be eliminated.

Implementations

impl CommonSubexprEliminate

pub fn new() -> Self

Trait Implementations

impl Default for CommonSubexprEliminate

fn default() -> Self

Returns the “default value” for a type.

impl OptimizerRule for CommonSubexprEliminate

fn try_optimize( &self, plan: &LogicalPlan, config: &dyn OptimizerConfig ) -> Result<Option<LogicalPlan>>

Try and rewrite plan to an optimized form, returning None if the plan cannot be optimized by this rule.

fn name(&self) -> &str

A human readable name for this optimizer rule

fn apply_order(&self) -> Option<ApplyOrder>

How should the rule be applied by the optimizer? See comments on ApplyOrder for details.