Struct BTreeCursor

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pub struct BTreeCursor<P: PageStore> { /* private fields */ }

Expand description

B+ Tree cursor for iteration

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impl<P: PageStore> BTreeCursor

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pub fn peek_key(&mut self) -> BTreeResult<Option<Vec<u8>>>

Inspect the next key without materializing its value or advancing.

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pub fn skip_next(&mut self) -> BTreeResult<bool>

Skip a shadowed or deleted base record without reading its overflow value.

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pub fn next_with_budget( &mut self, limit_bytes: usize, ) -> BTreeResult<Option<(Vec<u8>, Vec<u8>)>>

Read one value within the caller’s materialization allowance.

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pub fn next(&mut self) -> BTreeResult<Option<(Vec<u8>, Vec<u8>)>>

Move to next entry

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pub fn peek(&self) -> BTreeResult<Option<(Vec<u8>, Vec<u8>)>>

Peek at current entry without advancing

Auto Trait Implementations§

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impl UnwindSafe for BTreeCursor
where Arc: 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, U> Into 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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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