Struct 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 Debug for SimplifyExpressions

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

Formats the value using the given formatter.

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 apply_order(&self) -> Option<ApplyOrder>

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

fn supports_rewrite(&self) -> bool

👎Deprecated since 47.0.0: This method is no longer used

Does this rule support rewriting owned plans (rather than by reference)?

fn rewrite( &self, plan: LogicalPlan, config: &dyn OptimizerConfig, ) -> Result<Transformed<LogicalPlan>, DataFusionError>

Try to rewrite plan to an optimized form, returning Transformed::yes if the plan was rewritten and Transformed::no if it was not.