Struct mz_transform :: analysis :: Cardinality Copy item path

impl Cardinality

pub fn with_stats(stats: BTreeMap<GlobalId, usize>) -> Self

A cardinality estimator with provided statistics for the given global identifiers

impl Cardinality

fn flat_map( &self, tf: &TableFunc, input: CardinalityEstimate, ) -> CardinalityEstimate

fn predicate( &self, predicate_expr: &MirScalarExpr, unique_columns: &BTreeSet<usize>, ) -> OrderedFloat<f64>

fn filter( &self, predicates: &Vec<MirScalarExpr>, keys: &Vec<Vec<usize>>, input: CardinalityEstimate, ) -> CardinalityEstimate

fn join( &self, equivalences: &Vec<Vec<MirScalarExpr>>, _implementation: &JoinImplementation, unique_columns: BTreeMap<usize, usize>, inputs: Vec<CardinalityEstimate>, ) -> CardinalityEstimate

fn reduce( &self, group_key: &Vec<MirScalarExpr>, expected_group_size: &Option<u64>, input: CardinalityEstimate, ) -> CardinalityEstimate

fn topk( &self, group_key: &Vec<usize>, limit: &Option<MirScalarExpr>, expected_group_size: &Option<u64>, input: CardinalityEstimate, ) -> CardinalityEstimate

fn threshold(&self, input: CardinalityEstimate) -> CardinalityEstimate

Trait Implementations§

impl Analysis for Cardinality

type Value = CardinalityEstimate

The type of value this analysis associates with an expression.

fn announce_dependencies(builder: &mut DerivedBuilder<'_>)

Announce any depencies this analysis has on other analyses. Read more

fn derive( &self, expr: &MirRelationExpr, index: usize, results: &[Self::Value], depends: &Derived, ) -> Self::Value

The analysis value derived for an expression, given other analysis results. Read more

fn lattice() -> Option<Box<dyn Lattice<Self::Value>>>

When available, provide a lattice interface to allow optimistic recursion. Read more

impl Default for Cardinality

fn default() -> Self

Returns the “default value” for a type. Read more

Auto Trait Implementations§

impl UnwindSafe for Cardinality

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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where T: ?Sized,

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Immutably borrows from an owned value. Read more

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where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.

fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.

fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.

fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.

fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.

fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.

fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.

fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.

fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more

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fn from(t: T) -> T

Returns the argument unchanged.

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Mutably borrows self and passes that borrow into the pipe function. Read more

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Borrows self, then passes self.borrow() into the pipe function. Read more

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Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more

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const ALIGN: usize = _

The alignment of pointer.

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The type for initializers.

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Initializes a with the given initializer. Read more

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See RustType::into_proto.

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fn plus_equals(&mut self, rhs: &&'a S)

The method of std::ops::AddAssign, for types that do not implement AddAssign.

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Mutable access to a value. Read more

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Calls .tap_deref() only in debug builds, and is erased in release builds.

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