Struct mz_expr::interpret::MfpEval

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pub(crate) struct MfpEval<'a, E: Interpreter + ?Sized> {
    evaluator: &'a E,
    input_arity: usize,
    expressions: Vec<E::Summary>,
}
Expand description

Wrap another interpreter, but tack a few extra columns on at the end. An internal implementation detail of eval_mfp and eval_mfp_plan.

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§evaluator: &'a E§input_arity: usize§expressions: Vec<E::Summary>

Implementations§

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impl<'a, E: Interpreter + ?Sized> MfpEval<'a, E>

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pub(crate) fn new( evaluator: &'a E, input_arity: usize, expressions: &[MirScalarExpr], ) -> Self

Trait Implementations§

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impl<'a, E: Interpreter + ?Sized> Interpreter for MfpEval<'a, E>

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type Summary = <E as Interpreter>::Summary

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fn column(&self, id: usize) -> Self::Summary

A column of the input row.
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fn literal( &self, result: &Result<Row, EvalError>, col_type: &ColumnType, ) -> Self::Summary

A literal value. (Stored as a row, because we can’t own a Datum.)
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fn unmaterializable(&self, func: &UnmaterializableFunc) -> Self::Summary

A call to an unmaterializable function. Read more
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fn unary(&self, func: &UnaryFunc, expr: Self::Summary) -> Self::Summary

A function call that takes one expression as an argument.
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fn binary( &self, func: &BinaryFunc, left: Self::Summary, right: Self::Summary, ) -> Self::Summary

A function call that takes two expressions as arguments.
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fn variadic( &self, func: &VariadicFunc, exprs: Vec<Self::Summary>, ) -> Self::Summary

A function call that takes an arbitrary number of arguments.
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fn cond( &self, cond: Self::Summary, then: Self::Summary, els: Self::Summary, ) -> Self::Summary

Conditionally evaluated expressions.
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fn expr(&self, expr: &MirScalarExpr) -> Self::Summary

Evaluate an entire expression, by delegating to the fine-grained methods on Interpreter.
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fn mfp_filter(&self, mfp: &MapFilterProject) -> Self::Summary

Specifically, this evaluates the map and filters stages of an MFP: summarize each of the map expressions, then and together all of the filters.
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fn mfp_plan_filter(&self, plan: &MfpPlan) -> Self::Summary

Similar to Self::mfp_filter, but includes the additional temporal filters that have been broken out.

Auto Trait Implementations§

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impl<'a, E> Freeze for MfpEval<'a, E>
where E: ?Sized,

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impl<'a, E> RefUnwindSafe for MfpEval<'a, E>

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impl<'a, E> Send for MfpEval<'a, E>
where E: Sync + ?Sized, <E as Interpreter>::Summary: Send,

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impl<'a, E> Sync for MfpEval<'a, E>
where E: Sync + ?Sized, <E as Interpreter>::Summary: Sync,

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impl<'a, E> Unpin for MfpEval<'a, E>
where <E as Interpreter>::Summary: Unpin, E: ?Sized,

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impl<'a, E> UnwindSafe for MfpEval<'a, E>

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T, U> CastInto<U> for T
where U: CastFrom<T>,

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fn cast_into(self) -> U

Performs the cast.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> FutureExt for T

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

Attaches the provided Context to this type, returning a WithContext wrapper. Read more
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fn with_current_context(self) -> WithContext<Self>

Attaches the current Context to this type, returning a WithContext wrapper. Read more
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impl<T> Instrument for T

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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

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impl<T> IntoRequest<T> for T

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fn into_request(self) -> Request<T>

Wrap the input message T in a tonic::Request
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impl<T, U> OverrideFrom<Option<&T>> for U
where U: OverrideFrom<T>,

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

Override the configuration represented by Self with values from the given layer.
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<P, R> ProtoType<R> for P
where R: RustType<P>,

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impl<T> Same for T

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type Output = T

Should always be Self
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impl<'a, S, T> Semigroup<&'a S> for T
where T: Semigroup<S>,

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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where S: Into<Dispatch>,

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