Struct datafusion_optimizer::simplify_expressions::simplify_exprs::SimplifyExpressions

pub struct SimplifyExpressions {}

Optimizer Pass that simplifies LogicalPlans by rewriting Expr`s evaluating constants and applying algebraic simplifications

Introduction

It uses boolean algebra laws to simplify or reduce the number of terms in expressions.

Example:

Filter: b > 2 AND b > 2 is optimized to Filter: b > 2

Implementations

impl SimplifyExpressions

pub fn new() -> Self

Trait Implementations

impl Default for SimplifyExpressions

fn default() -> SimplifyExpressions

Returns the “default value” for a type.

impl OptimizerRule for SimplifyExpressions

fn name(&self) -> &str

A human readable name for this optimizer rule

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 apply_order(&self) -> Option<ApplyOrder>

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