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ProjectionResult

Enum ProjectionResult 

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pub enum ProjectionResult {
    Lookup(Knowledge<EntryValue>),
    RollUp(Knowledge<PartitionRollUpSummary>),
    Tree(Knowledge<TreePage>),
    Flat(FlatPage),
    Aggregate(CountResult),
    Report(Report),
    Diagnostics(ReadDiagnostics),
    Limit(QueryLimit),
    Refused(ProjectionRefusal),
}
Expand description

One projection result, in the same position as its request.

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Lookup(Knowledge<EntryValue>)

Three-valued retained-entry lookup.

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RollUp(Knowledge<PartitionRollUpSummary>)

Three-valued directory roll-up lookup.

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Tree(Knowledge<TreePage>)

Three-valued structural tree page.

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Flat(FlatPage)

Portable flat entry page.

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Aggregate(CountResult)

Exact maintained or explicitly capped portable selection count.

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Report(Report)

Existing fdu query report.

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Diagnostics(ReadDiagnostics)

Fixed-size provider and lifecycle diagnostics.

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Limit(QueryLimit)

A bounded projection stopped without returning a misleading partial answer.

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Refused(ProjectionRefusal)

This projection refused; the rest of the read answered.

Trait Implementations§

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impl Clone for ProjectionResult

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for ProjectionResult

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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, 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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = !

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

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.