[−][src]Trait sanakirja::Transaction
Trait for operations common to mutable and immutable transactions.
Provided methods
pub fn iter<'a, K: Representable, V: Representable>(
&'a self,
db: &'a Db<K, V>,
key: Option<(K, Option<V>)>
) -> Result<DbIterator<'a, Self, K, V>, CRCError>
[src]
&'a self,
db: &'a Db<K, V>,
key: Option<(K, Option<V>)>
) -> Result<DbIterator<'a, Self, K, V>, CRCError>
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
).
pub fn rev_iter<'a, K: Representable, V: Representable>(
&'a self,
db: &'a Db<K, V>,
key: Option<(K, Option<V>)>
) -> Result<RevDbIterator<'a, Self, K, V>, CRCError>
[src]
&'a self,
db: &'a Db<K, V>,
key: Option<(K, Option<V>)>
) -> Result<RevDbIterator<'a, Self, K, V>, CRCError>
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()
).
pub fn set_cursors<K: Representable, V: Representable>(
&self,
root: &Db<K, V>,
key: Option<(K, Option<V>)>
) -> Result<(Cursor, bool), CRCError>
[src]
&self,
root: &Db<K, V>,
key: Option<(K, Option<V>)>
) -> Result<(Cursor, bool), CRCError>
Create a cursor positionned just on the largest (key, value)
that is strictly smaller than key
(at the beginning if
key.is_none()
).
pub fn set_cursors_last<K: Representable, V: Representable>(
&self,
root: &Db<K, V>
) -> Result<Cursor, CRCError>
[src]
&self,
root: &Db<K, V>
) -> Result<Cursor, CRCError>
Create a cursor positionned just on the largest (key, value)
that is strictly smaller than key
(at the beginning if
key.is_none()
).
pub fn root<K: Representable, V: Representable>(
&self,
root: usize
) -> Option<Db<K, V>>
[src]
&self,
root: usize
) -> Option<Db<K, V>>
Gets the specified root. At most 508 different roots are allowed.
pub fn get<'a, K: Representable, V: Representable>(
&'a self,
root: &Db<K, V>,
key: K,
value: Option<V>
) -> Result<Option<V>, CRCError>
[src]
&'a self,
root: &Db<K, V>,
key: K,
value: Option<V>
) -> Result<Option<V>, CRCError>
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.