[−][src]Trait sanakirja::Transaction
Trait for operations common to mutable and immutable transactions.
Provided methods
ⓘImportant traits for DbIterator<'a, T, K, V>fn iter<'a, K: Representable, V: Representable>(
&'a self,
db: &'a Db<K, V>,
key: Option<(K, Option<V>)>
) -> DbIterator<'a, Self, K, V>
ⓘImportant traits for DbIterator<'a, T, K, V>
&'a self,
db: &'a Db<K, V>,
key: Option<(K, Option<V>)>
) -> DbIterator<'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
).
ⓘImportant traits for RevDbIterator<'a, T, K, V>fn rev_iter<'a, K: Representable, V: Representable>(
&'a self,
db: &'a Db<K, V>,
key: Option<(K, Option<V>)>
) -> RevDbIterator<'a, Self, K, V>
ⓘImportant traits for RevDbIterator<'a, T, K, V>
&'a self,
db: &'a Db<K, V>,
key: Option<(K, Option<V>)>
) -> RevDbIterator<'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()
).
fn set_cursors<K: Representable, V: Representable>(
&self,
root: &Db<K, V>,
key: Option<(K, Option<V>)>
) -> (Cursor, bool)
&self,
root: &Db<K, V>,
key: Option<(K, Option<V>)>
) -> (Cursor, bool)
Create a cursor positionned just before key
.
fn root<K: Representable, V: Representable>(
&self,
root: usize
) -> Option<Db<K, V>>
&self,
root: usize
) -> Option<Db<K, V>>
Gets the specified root. At most 508 different roots are allowed.
fn get<'a, K: Representable, V: Representable>(
&'a self,
root: &Db<K, V>,
key: K,
value: Option<V>
) -> Option<V>
&'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.