pub struct Txn<'env> { /* private fields */ }
Expand description
An immutable transaction.
Trait Implementations§
source§impl<'env> Transaction for Txn<'env>
impl<'env> Transaction for Txn<'env>
source§fn iter<'a, K: Representable, V: Representable>(
&'a self,
db: &'a Db<K, V>,
key: Option<(K, Option<V>)>
) -> Cursor<'a, Self, K, V> ⓘ
fn iter<'a, K: Representable, V: Representable>(
&'a self,
db: &'a Db<K, V>,
key: Option<(K, Option<V>)>
) -> Cursor<'a, Self, K, V> ⓘ
Iterate over a database, starting at the first value larger
than or equal to
(key, value)
(and at the smallest key, or
smallest value if one or both of them is None
). Read moresource§fn rev_iter<'a, K: Representable, V: Representable>(
&'a self,
db: &'a Db<K, V>,
key: Option<(K, Option<V>)>
) -> RevCursor<'a, Self, K, V> ⓘ
fn rev_iter<'a, K: Representable, V: Representable>(
&'a self,
db: &'a Db<K, V>,
key: Option<(K, Option<V>)>
) -> RevCursor<'a, Self, K, V> ⓘ
Iterate over a database in the reverse order, starting from the last binding strictly before
k
(or from the last binding in the table if k.is_none()
).source§fn root<K: Representable, V: Representable>(
&mut self,
root: usize
) -> Option<Db<K, V>>
fn root<K: Representable, V: Representable>(
&mut self,
root: usize
) -> Option<Db<K, V>>
Gets the specified root. At most 508 different roots are allowed.
source§fn get<'a, K: Representable, V: Representable>(
&'a self,
root: &Db<K, V>,
key: K,
value: Option<V>
) -> Option<V>
fn get<'a, K: Representable, V: Representable>(
&'a self,
root: &Db<K, V>,
key: K,
value: Option<V>
) -> Option<V>
Get the smallest value associated to
key
, or returns the
given binding if value
is Some(..)
and is associated to
key
in the given database. Read more