LimitIterator

Struct LimitIterator 

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pub struct LimitIterator<I: RowIterator> { /* private fields */ }
Expand description

Iterator that applies LIMIT and OFFSET constraints.

This iterator skips the first offset rows and yields at most limit rows. It provides early termination - once the limit is reached, no more rows are requested from the input.

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impl<I: RowIterator> LimitIterator<I>

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pub fn new(input: I, limit: Option<u64>, offset: Option<u64>) -> Self

Creates a new limit iterator with the given LIMIT and OFFSET.

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impl<I: RowIterator> RowIterator for LimitIterator<I>

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fn next_row(&mut self) -> Option<Result<Row>>

Advances the iterator and returns the next row, or None if exhausted. Read more
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fn schema(&self) -> &[ColumnMetadata]

Returns the schema of rows produced by this iterator.

Auto Trait Implementations§

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impl<I> Freeze for LimitIterator<I>
where I: Freeze,

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impl<I> RefUnwindSafe for LimitIterator<I>
where I: RefUnwindSafe,

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impl<I> Send for LimitIterator<I>
where I: Send,

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impl<I> Sync for LimitIterator<I>
where I: Sync,

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impl<I> Unpin for LimitIterator<I>
where I: Unpin,

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impl<I> UnwindSafe for LimitIterator<I>
where I: 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> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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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, 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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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
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,