Struct dataflow_types::plan::join::delta_join::DeltaPathPlan

pub struct DeltaPathPlan {
    pub source_relation: usize,
    pub source_key: Vec<MirScalarExpr>,
    pub initial_closure: JoinClosure,
    pub stage_plans: Vec<DeltaStagePlan>,
    pub final_closure: Option<JoinClosure>,
}

A delta query path is implemented by a sequences of stages,

Fields

source_relation: usize

The relation whose updates seed the dataflow path.

source_key: Vec<MirScalarExpr>

The key we expect the source relation to be arranged by.

initial_closure: JoinClosure

An initial closure to apply before any stages.

stage_plans: Vec<DeltaStagePlan>

A sequence of stages to apply one after the other.

final_closure: Option<JoinClosure>

A concluding closure to apply after the last stage.

Values of None indicate the identity closure.

Trait Implementations

impl Clone for DeltaPathPlan

fn clone(&self) -> DeltaPathPlan

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DeltaPathPlan

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DeltaPathPlan

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

Deserialize this value from the given Serde deserializer.

impl Serialize for DeltaPathPlan

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

Serialize this value into the given Serde serializer.