Struct ViewMatcher 

pub struct ViewMatcher { /* private fields */ }

A logical optimizer that generates candidate logical plans in the form of OneOf nodes.

Implementations

impl ViewMatcher

pub async fn try_new_from_state(session_state: &SessionState) -> Result<Self>

Loads table information and processes all views, returning a new optimizer rule.

Trait Implementations

impl Debug for ViewMatcher

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

Formats the value using the given formatter.

impl OptimizerRule for ViewMatcher

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

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

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 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.