Struct ReadTransaction

pub struct ReadTransaction<K, V, I, C, S>
where
    S: AsyncSpawner,
{ /* private fields */ }

A read only transaction over the [OptimisticDb],

Implementations

impl<K, V, I, C, S> ReadTransaction<K, V, I, C, S>

where K: Ord, I: Database<K, V>, S: AsyncSpawner,

pub fn version(&self) -> u64

Returns the version of the transaction.

pub fn get<Q>(&self, key: &Q) -> Option<Ref<'_, K, V>>

where K: Borrow<Q>, Q: Ord + ?Sized,

Get a value from the database.

pub fn contains_key<Q>(&self, key: &Q) -> bool

where K: Borrow<Q>, Q: Ord + ?Sized,

Returns true if the given key exists in the database.

pub fn iter(&self) -> Iter<'_, K, V>

Returns an iterator over the entries of the database.

pub fn iter_rev(&self) -> RevIter<'_, K, V>

Returns a reverse iterator over the entries of the database.

pub fn range<Q, R>(&self, range: R) -> Range<'_, Q, R, K, V>

where K: Borrow<Q>, R: RangeBounds<Q>, Q: Ord + ?Sized,

Returns an iterator over the subset of entries of the database.

pub fn range_rev<Q, R>(&self, range: R) -> RevRange<'_, Q, R, K, V>

where K: Borrow<Q>, R: RangeBounds<Q>, Q: Ord + ?Sized,

Returns an iterator over the subset of entries of the database in reverse order.