Struct mz_expr::SafeMfpPlan

source ·
pub struct SafeMfpPlan { /* private fields */ }
Expand description

A wrapper type which indicates it is safe to simply evaluate all expressions.

Implementations§

source§

impl SafeMfpPlan

source

pub fn permute(&mut self, map: BTreeMap<usize, usize>, new_arity: usize)

source

pub fn evaluate_into<'a, 'row>( &'a self, datums: &mut Vec<Datum<'a>>, arena: &'a RowArena, row_buf: &'row mut Row ) -> Result<Option<Row>, EvalError>

Evaluates the linear operator on a supplied list of datums.

The arguments are the initial datums associated with the row, and an appropriately lifetimed arena for temporary allocations needed by scalar evaluation.

An Ok result will either be None if any predicate did not evaluate to Datum::True, or the values of the columns listed by self.projection if all predicates passed. If an error occurs in the evaluation it is returned as an Err variant. As the evaluation exits early with failed predicates, it may miss some errors that would occur later in evaluation.

The row is not cleared first, but emptied if the function returns `Ok(Some(row)).

source

pub fn evaluate_iter<'b, 'a: 'b>( &'a self, datums: &'b mut Vec<Datum<'a>>, arena: &'a RowArena ) -> Result<Option<impl Iterator<Item = Datum<'a>> + 'b>, EvalError>

A version of evaluate which produces an iterator over Datum as output.

This version can be useful when one wants to capture the resulting datums without packing and then unpacking a row.

source

pub fn evaluate_inner<'b, 'a: 'b>( &'a self, datums: &'b mut Vec<Datum<'a>>, arena: &'a RowArena ) -> Result<bool, EvalError>

Populates datums with self.expressions and tests self.predicates.

This does not apply self.projection, which is up to the calling method.

source

pub fn could_error(&self) -> bool

Returns true if evaluation could introduce an error on non-error inputs.

source

pub fn is_identity(&self) -> bool

Returns true when Self is the identity.

Methods from Deref<Target = MapFilterProject>§

source

pub fn is_identity(&self) -> bool

True if the operator describes the identity transformation.

source

pub fn as_map_filter_project( &self ) -> (Vec<MirScalarExpr>, Vec<MirScalarExpr>, Vec<usize>)

As the arguments to Map, Filter, and Project operators.

In principle, this operator can be implemented as a sequence of more elemental operators, likely less efficiently.

source

pub fn literal_constraint(&self, expr: &MirScalarExpr) -> Option<Datum<'_>>

Determines if a scalar expression must be equal to a literal datum.

source

pub fn literal_constraints(&self, exprs: &[MirScalarExpr]) -> Option<Row>

Determines if a sequence of scalar expressions must be equal to a literal row.

This method returns None on an empty exprs, which might be surprising, but seems to line up with its callers’ expectations of that being a non-constraint. The caller knows if exprs is empty, and can modify their behavior appropriately. if they would rather have a literal empty row.

source

pub fn demand(&self) -> BTreeSet<usize>

Lists input columns whose values are used in outputs.

It is entirely appropriate to determine the demand of an instance and then both apply a projection to the subject of the instance and self.permute this instance.

source

pub fn size(&self) -> usize

Total expression sizes across all expressions.

Trait Implementations§

source§

impl Arbitrary for SafeMfpPlan

§

type Parameters = <MapFilterProject as Arbitrary>::Parameters

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

type Strategy = Map<<MapFilterProject as Arbitrary>::Strategy, fn(_: MapFilterProject) -> SafeMfpPlan>

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

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. Read more
source§

fn arbitrary() -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). Read more
source§

impl Clone for SafeMfpPlan

source§

fn clone(&self) -> SafeMfpPlan

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
source§

impl Debug for SafeMfpPlan

source§

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

Formats the value using the given formatter. Read more
source§

impl Deref for SafeMfpPlan

§

type Target = MapFilterProject

The resulting type after dereferencing.
source§

fn deref(&self) -> &Self::Target

Dereferences the value.
source§

impl<'de> Deserialize<'de> for SafeMfpPlan

source§

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

Deserialize this value from the given Serde deserializer. Read more
source§

impl Ord for SafeMfpPlan

source§

fn cmp(&self, other: &SafeMfpPlan) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · source§

fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · source§

fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
source§

impl PartialEq for SafeMfpPlan

source§

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

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

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.
source§

impl PartialOrd for SafeMfpPlan

source§

fn partial_cmp(&self, other: &SafeMfpPlan) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

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

This method tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

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

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
1.0.0 · source§

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

This method tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

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

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
source§

impl RustType<ProtoSafeMfpPlan> for SafeMfpPlan

source§

fn into_proto(&self) -> ProtoSafeMfpPlan

Convert a Self into a Proto value.
source§

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

Consume and convert a Proto back into a Self value. Read more
source§

impl Serialize for SafeMfpPlan

source§

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

Serialize this value into the given Serde serializer. Read more
source§

impl Eq for SafeMfpPlan

source§

impl StructuralPartialEq for SafeMfpPlan

Auto Trait Implementations§

Blanket Implementations§

source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T, U> CastInto<U> for T
where U: CastFrom<T>,

source§

fn cast_into(self) -> U

Performs the cast.
source§

impl<Q, K> Comparable<K> for Q
where Q: Ord + ?Sized, K: Borrow<Q> + ?Sized,

source§

fn compare(&self, key: &K) -> Ordering

Compare self to key and return their ordering.
source§

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

source§

fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
source§

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

source§

fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
source§

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

source§

fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T> FromRef<T> for T
where T: Clone,

source§

fn from_ref(input: &T) -> T

Converts to this type from a reference to the input type.
source§

impl<T> FutureExt for T

source§

fn with_context(self, otel_cx: Context) -> WithContext<Self>

Attaches the provided Context to this type, returning a WithContext wrapper. Read more
source§

fn with_current_context(self) -> WithContext<Self>

Attaches the current Context to this type, returning a WithContext wrapper. Read more
source§

impl<T> Instrument for T

source§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
source§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

impl<T, U> Into<U> for T
where U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T> IntoRequest<T> for T

source§

fn into_request(self) -> Request<T>

Wrap the input message T in a tonic::Request
source§

impl<T, U> OverrideFrom<Option<&T>> for U
where U: OverrideFrom<T>,

source§

fn override_from(self, layer: &Option<&T>) -> U

Override the configuration represented by Self with values from the given layer.
source§

impl<T> Pointable for T

source§

const ALIGN: usize = _

The alignment of pointer.
§

type Init = T

The type for initializers.
source§

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
source§

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
source§

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
source§

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
source§

impl<T> PreferredContainer for T
where T: Ord + Clone + 'static,

§

type Container = Vec<T>

The preferred container for the type.
source§

impl<T> ProgressEventTimestamp for T
where T: Data + Debug + Any,

source§

fn as_any(&self) -> &(dyn Any + 'static)

Upcasts this ProgressEventTimestamp to Any. Read more
source§

fn type_name(&self) -> &'static str

Returns the name of the concrete type of this object. Read more
source§

impl<P, R> ProtoType<R> for P
where R: RustType<P>,

source§

impl<T> Same for T

§

type Output = T

Should always be Self
source§

impl<'a, S, T> Semigroup<&'a S> for T
where T: Semigroup<S>,

source§

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

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

impl<T> ToOwned for T
where T: Clone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
source§

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

source§

fn vzip(self) -> V

source§

impl<T> WithSubscriber for T

source§

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,

source§

impl<T> Data for T
where T: Clone + 'static,

source§

impl<T> Data for T
where T: Send + Sync + Any + Serialize + for<'a> Deserialize<'a> + 'static,

source§

impl<T> Data for T
where T: Data + Ord + Debug,

source§

impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,

source§

impl<T> ExchangeData for T
where T: Data + Data,

source§

impl<T> ExchangeData for T
where T: ExchangeData + Ord + Debug,