Struct LoadExecutor 

pub struct LoadExecutor<E: EntityKind> { /* private fields */ }

LoadExecutor

Implementations

impl<E: EntityKind> LoadExecutor<E>

pub const fn new(db: Db<E::Canister>, debug: bool) -> Self

pub fn execute( &self, plan: ExecutablePlan<E>, ) -> Result<Response<E>, InternalError>

Execute an executor-ready plan directly (no planner inference).

pub fn require_one(&self, plan: ExecutablePlan<E>) -> Result<(), InternalError>

Execute a plan and require exactly one row.

pub fn count(&self, plan: ExecutablePlan<E>) -> Result<u32, InternalError>

Count rows matching a plan.

pub fn group_count_by<K, F>( &self, plan: ExecutablePlan<E>, key_fn: F, ) -> Result<HashMap<K, u32>, InternalError>

where K: Eq + Hash, F: Fn(&E) -> K,

Group rows matching a plan and count them by a derived key.

This is intentionally implemented on the executor (not Response) so it can later avoid full deserialization.

Trait Implementations

impl<E: Clone + EntityKind> Clone for LoadExecutor<E>

where E::Canister: Clone,

fn clone(&self) -> LoadExecutor<E>

Returns a duplicate of the value.

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

Performs copy-assignment from source.