Enum mz_compute_client::plan::top_k::TopKPlan

pub enum TopKPlan {
    MonotonicTop1(MonotonicTop1Plan),
    MonotonicTopK(MonotonicTopKPlan),
    Basic(BasicTopKPlan),
}

A plan encapsulating different variants to compute a TopK operation.

Variants

MonotonicTop1(MonotonicTop1Plan)

A plan for Top1 for monotonic inputs.

MonotonicTopK(MonotonicTopKPlan)

A plan for TopK for monotonic inputs.

Basic(BasicTopKPlan)

A plan for generic TopK operations.

Implementations

impl TopKPlan

pub(crate) fn create_from(
    group_key: Vec<usize>,
    order_key: Vec<ColumnOrder>,
    offset: usize,
    limit: Option<usize>,
    arity: usize,
    monotonic: bool
) -> Self

Create a plan from the information provided. Here we decide on which of the TopK plan variants to select.

• group_key - The columns serving as the group key.
• order_key - The columns specifying an ordering withing each group.
• offset - The number of rows to skip at the top. Provide 0 to reveal all rows.
• limit - An optional limit of how many rows should be revealed.
• arity - The number of columns in the input and output.
• monotonic - true if the input is monotonic.

Trait Implementations

impl Arbitrary for TopKPlan

type Parameters = (<MonotonicTop1Plan as Arbitrary>::Parameters, <MonotonicTopKPlan as Arbitrary>::Parameters, <BasicTopKPlan as Arbitrary>::Parameters)

The type of parameters that arbitrary_with accepts for configuration of the generated Strategy. Parameters must implement Default.

type Strategy = Union<BoxedStrategy<TopKPlan>>

The type of Strategy used to generate values of type Self.

fn arbitrary_with(_top: Self::Parameters) -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). The strategy is passed the arguments given in args.

fn arbitrary() -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self).

impl Clone for TopKPlan

fn clone(&self) -> TopKPlan

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for TopKPlan

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TopKPlan

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

Deserialize this value from the given Serde deserializer.

impl PartialEq<TopKPlan> for TopKPlan

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl RustType<ProtoTopKPlan> for TopKPlan

fn into_proto(&self) -> ProtoTopKPlan

Convert a Self into a Proto value.

fn from_proto(proto: ProtoTopKPlan) -> Result<Self, TryFromProtoError>

Consume and convert a Proto back into a Self value.

impl Serialize for TopKPlan

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

Serialize this value into the given Serde serializer.

impl Eq for TopKPlan

impl StructuralEq for TopKPlan

impl StructuralPartialEq for TopKPlan