Struct PatternLoweringRule 

pub struct PatternLoweringRule { /* private fields */ }

This rule is responsible for lowering a PatternNode into a set of filters and projections.

Implementations

impl PatternLoweringRule

pub fn new(context: RdfFusionContextView) -> PatternLoweringRule

Creates a new PatternLoweringRule.

Trait Implementations

impl Debug for PatternLoweringRule

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

Formats the value using the given formatter.

impl OptimizerRule for PatternLoweringRule

fn name(&self) -> &str

A human readable name for this optimizer rule

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.

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)?