Enum QueryPolicy 

#[non_exhaustive]
pub enum QueryPolicy {
    Prepared,
    Membership,
    DeltaMembership,
    Result,
}

How a prepared query caches structural membership or full results between executions.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Prepared

Reuse only the resolved plan and traverse sparse or table storage each execution.

Membership

Keep structural membership and apply added/changed windows during traversal.

DeltaMembership

Maintain membership incrementally from the world’s query delta log.

Result

Materialize the full result set once; added/changed windows are rejected.

Trait Implementations

impl Clone for QueryPolicy

fn clone(&self) -> QueryPolicy

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for QueryPolicy

impl Debug for QueryPolicy

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

Formats the value using the given formatter.

impl Default for QueryPolicy

fn default() -> QueryPolicy

Returns the “default value” for a type.

impl Eq for QueryPolicy

impl PartialEq for QueryPolicy

fn eq(&self, other: &QueryPolicy) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for QueryPolicy