Struct Iter

pub struct Iter<R: RangeKv> {
    inner: R,
    range: BytesFullKeyRange,
    current: IntoIter<(FullKey<Bytes>, Option<Bytes>)>,
    rev: bool,
}

A utility struct for iterating over a range of keys in a locked BTreeMap, which will batch some records to make a trade-off between the copying overhead and the times of acquiring the lock.

Therefore, it’s not guaranteed that we’re iterating over a consistent snapshot of the map. Users should handle MVCC by themselves.

Fields

inner: R

range: BytesFullKeyRange

current: IntoIter<(FullKey<Bytes>, Option<Bytes>)>

rev: bool

Implementations

impl<R: RangeKv> Iter<R>

pub fn new(inner: R, range: BytesFullKeyRange, rev: bool) -> Self

impl<R: RangeKv> Iter<R>

const BATCH_SIZE: usize = 256usize

fn refill(&mut self) -> StorageResult<()>

Get the next batch of records and fill the current buffer.

impl<R: RangeKv> Iter<R>

pub fn next(&mut self) -> StorageResult<Option<(BytesFullKey, Option<Bytes>)>>