Struct dataflow_types::plan::reduce::AccumulablePlan

pub struct AccumulablePlan {
    pub full_aggrs: Vec<AggregateExpr>,
    pub simple_aggrs: Vec<(usize, usize, AggregateExpr)>,
    pub distinct_aggrs: Vec<(usize, usize, AggregateExpr)>,
}

Plan for computing a set of accumulable aggregations.

We fuse all of the accumulable aggregations together and compute them with one dataflow fragment. We need to be careful to separate out the aggregations that apply only to the distinct set of values. We need to apply a distinct operator to those before we combine them with everything else.

Fields

full_aggrs: Vec<AggregateExpr>

All of the aggregations we were asked to compute, stored in order.

simple_aggrs: Vec<(usize, usize, AggregateExpr)>

All of the non-distinct accumulable aggregates. Each element represents: (index of the aggregation among accumulable aggregations, index of the datum among inputs, aggregation expr) These will all be rendered together in one dataflow fragment.

distinct_aggrs: Vec<(usize, usize, AggregateExpr)>

Same as above but for all of the DISTINCT accumulable aggregations.

Trait Implementations

impl Clone for AccumulablePlan

fn clone(&self) -> AccumulablePlan

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for AccumulablePlan

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AccumulablePlan

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

Deserialize this value from the given Serde deserializer.

impl Serialize for AccumulablePlan

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

Serialize this value into the given Serde serializer.