Struct dataflow_types::plan::reduce::CollationPlan

pub struct CollationPlan {
    pub accumulable: Option<AccumulablePlan>,
    pub hierarchical: Option<HierarchicalPlan>,
    pub basic: Option<BasicPlan>,
    pub aggregate_types: Vec<ReductionType>,
}

Plan for collating the results of computing multiple aggregation types.

TODO: could we express this as a delta join

Fields

accumulable: Option<AccumulablePlan>

Accumulable aggregation results to collate, if any.

hierarchical: Option<HierarchicalPlan>

Hierarchical aggregation results to collate, if any.

basic: Option<BasicPlan>

Basic aggregation results to collate, if any.

aggregate_types: Vec<ReductionType>

When we get results back from each of the different aggregation types, they will be subsequences of the sequence aggregations in the original reduce expression. We keep a map from output position -> reduction type to easily merge results back into the requested order.

Trait Implementations

impl Clone for CollationPlan

fn clone(&self) -> CollationPlan

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for CollationPlan

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

Formats the value using the given formatter.

impl Default for CollationPlan

fn default() -> CollationPlan

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for CollationPlan

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl Serialize for CollationPlan

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.