Struct leveldb::database::snapshots::Snapshot

pub struct Snapshot<'a, K: Key + 'a> { /* fields omitted */ }

A database snapshot

Represents a database at a certain point in time, and allows for all read operations (get and iteration).

Methods

impl<'a, K: Key> Snapshot<'a, K>

pub fn get<BK: Borrow<K>>(
    &'a self,
    options: ReadOptions<'a, K>,
    key: BK
) -> Result<Option<Vec<u8>>, Error>

fetches a key from the database

Inserts this snapshot into ReadOptions before reading

pub fn raw_ptr(&self) -> *mut leveldb_snapshot_t

Trait Implementations

impl<'a, K: Key + 'a> Iterable<'a, K> for Snapshot<'a, K>

Important traits for Iterator<'a, K>

impl<'a, K: Key> Iterator for Iterator<'a, K> type Item = (K, Vec<u8>);

fn iter(&'a self, options: ReadOptions<'a, K>) -> Iterator<K>

Return an Iterator iterating over (Key,Value) pairs

Important traits for KeyIterator<'a, K>

impl<'a, K: Key> Iterator for KeyIterator<'a, K> type Item = K;

fn keys_iter(&'a self, options: ReadOptions<'a, K>) -> KeyIterator<K>

Returns an Iterator iterating over Keys only.

Important traits for ValueIterator<'a, K>

impl<'a, K: Key> Iterator for ValueIterator<'a, K> type Item = Vec<u8>;

fn value_iter(&'a self, options: ReadOptions<'a, K>) -> ValueIterator<K>

Returns an Iterator iterating over Values only.