pub struct Peek<T = Timestamp> {
    pub target: PeekTarget,
    pub literal_constraints: Option<Vec<Row>>,
    pub uuid: Uuid,
    pub timestamp: T,
    pub finishing: RowSetFinishing,
    pub map_filter_project: SafeMfpPlan,
    pub otel_ctx: OpenTelemetryContext,
}
Expand description

Peek a collection, either in an arrangement or Persist.

This request elicits data from the worker, by naming the collection and some actions to apply to the results before returning them.

The timestamp member must be valid for the arrangement that is referenced by id. This means that AllowCompaction for this arrangement should not pass timestamp before this command. Subsequent commands may arbitrarily compact the arrangements; the dataflow runners are responsible for ensuring that they can correctly answer the Peek.

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§target: PeekTarget

Target-specific metadata.

§literal_constraints: Option<Vec<Row>>

If Some, then look up only the given keys from the collection (instead of a full scan). The vector is never empty.

§uuid: Uuid

The identifier of this peek request.

Used in responses and cancellation requests.

§timestamp: T

The logical timestamp at which the collection is queried.

§finishing: RowSetFinishing

Actions to apply to the result set before returning them.

§map_filter_project: SafeMfpPlan

Linear operation to apply in-line on each result.

§otel_ctx: OpenTelemetryContext

An OpenTelemetryContext to forward trace information along to the compute worker to allow associating traces between the compute controller and the compute worker.

Trait Implementations§

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impl<T: Arbitrary> Arbitrary for Peek<T>

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type Parameters = (<PeekTarget as Arbitrary>::Parameters, <T as Arbitrary>::Parameters, <RowSetFinishing as Arbitrary>::Parameters, <SafeMfpPlan as Arbitrary>::Parameters)

The type of parameters that arbitrary_with accepts for configuration of the generated Strategy. Parameters must implement Default.
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type Strategy = Map<(<PeekTarget as Arbitrary>::Strategy, BoxedStrategy<Option<Vec<Row>>>, BoxedStrategy<Uuid>, <T as Arbitrary>::Strategy, <RowSetFinishing as Arbitrary>::Strategy, <SafeMfpPlan as Arbitrary>::Strategy, BoxedStrategy<OpenTelemetryContext>), fn(_: (PeekTarget, Option<Vec<Row>>, Uuid, T, RowSetFinishing, SafeMfpPlan, OpenTelemetryContext)) -> Peek<T>>

The type of Strategy used to generate values of type Self.
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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
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fn arbitrary() -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). Read more
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impl<T: Clone> Clone for Peek<T>

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fn clone(&self) -> Peek<T>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<T: Debug> Debug for Peek<T>

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

Formats the value using the given formatter. Read more
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impl<'de, T> Deserialize<'de> for Peek<T>
where T: Deserialize<'de>,

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

Deserialize this value from the given Serde deserializer. Read more
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impl<T: PartialEq> PartialEq for Peek<T>

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fn eq(&self, other: &Peek<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.
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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.
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impl RustType<ProtoPeek> for Peek

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fn into_proto(&self) -> ProtoPeek

Convert a Self into a Proto value.
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fn from_proto(x: ProtoPeek) -> Result<Self, TryFromProtoError>

Consume and convert a Proto back into a Self value. Read more
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impl<T> Serialize for Peek<T>
where T: Serialize,

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

Serialize this value into the given Serde serializer. Read more
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impl<T> StructuralPartialEq for Peek<T>

Auto Trait Implementations§

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impl<T> RefUnwindSafe for Peek<T>
where T: RefUnwindSafe,

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impl<T> Send for Peek<T>
where T: Send,

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impl<T> Sync for Peek<T>
where T: Sync,

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impl<T> Unpin for Peek<T>
where T: Unpin,

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impl<T> UnwindSafe for Peek<T>
where T: UnwindSafe,

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> Conv for T

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fn conv<T>(self) -> T
where Self: Into<T>,

Converts self into T using Into<T>. Read more
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impl<T> DynClone for T
where T: Clone,

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fn __clone_box(&self, _: Private) -> *mut ()

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impl<T> FmtForward for T

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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more
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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> FromRef<T> for T
where T: Clone,

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fn from_ref(input: &T) -> T

Converts to this type from a reference to the input type.
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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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Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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Calls U::from(self).

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Wrap the input message T in a tonic::Request
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where Shared: FromUnshared<Unshared>,

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Creates a shared type from an unshared type.
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fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R
where Self: Sized,

Pipes by value. This is generally the method you want to use. Read more
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fn pipe_ref<'a, R>(&'a self, func: impl FnOnce(&'a Self) -> R) -> R
where R: 'a,

Borrows self and passes that borrow into the pipe function. Read more
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Mutably borrows self and passes that borrow into the pipe function. Read more
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where Self: Borrow<B>, B: 'a + ?Sized, R: 'a,

Borrows self, then passes self.borrow() into the pipe function. Read more
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where Self: BorrowMut<B>, B: 'a + ?Sized, R: 'a,

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where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

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where Self: AsMut<U>, U: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.as_mut() into the pipe function.
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where Self: Deref<Target = T>, T: 'a + ?Sized, R: 'a,

Borrows self, then passes self.deref() into the pipe function.
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fn pipe_deref_mut<'a, T, R>( &'a mut self, func: impl FnOnce(&'a mut T) -> R ) -> R
where Self: DerefMut<Target = T> + Deref, T: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.deref_mut() into the pipe function.
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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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Initializes a with the given initializer. Read more
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Dereferences the given pointer. Read more
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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<T> ProgressEventTimestamp for T
where T: Data + Debug + Any,

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Upcasts this ProgressEventTimestamp to Any. Read more
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type Output = T

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