Struct WriteTransaction

pub struct WriteTransaction<'env>(/* private fields */);

Implementations

impl<'env> WriteTransaction<'env>

pub fn new(env: &'env Environment) -> Self

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

where K: AsDatabaseBytes + ?Sized, V: FromDatabaseValue,

pub fn put_reserve<K, V>(&mut self, db: &Database<'_>, key: &K, value: &V)

where K: AsDatabaseBytes + ?Sized, V: IntoDatabaseValue + ?Sized,

Puts a key/value pair into the database by copying it into a reserved space in the database. This works best for values that need to be serialised into the reserved space. This method will panic when called on a database with duplicate keys!

pub fn put<K, V>(&mut self, db: &Database<'_>, key: &K, value: &V)

where K: AsDatabaseBytes + ?Sized, V: AsDatabaseBytes + ?Sized,

Puts a key/value pair into the database by passing a reference to a byte slice. This is more efficient than put_reserve if no serialisation is needed, and the existing value can be immediately written into the database. This also works with duplicate key databases.

pub fn remove<K>(&mut self, db: &Database<'_>, key: &K)

where K: AsDatabaseBytes + ?Sized,

pub fn remove_item<K, V>(&mut self, db: &Database<'_>, key: &K, value: &V)

where K: AsDatabaseBytes + ?Sized, V: AsDatabaseBytes + ?Sized,

pub fn commit(self)

pub fn abort(self)

pub fn cursor<'txn, 'db>( &'txn self, db: &'db Database<'env>, ) -> Cursor<'txn, 'db>

Methods from Deref<Target = Transaction<'env>>

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

where K: AsDatabaseBytes + ?Sized, V: FromDatabaseValue,

pub fn cursor<'txn, 'db>( &'txn self, db: &'db Database<'env>, ) -> Cursor<'txn, 'db>

Trait Implementations

impl<'env> Debug for WriteTransaction<'env>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'env> Deref for WriteTransaction<'env>

type Target = Transaction<'env>

The resulting type after dereferencing.

fn deref(&self) -> &Transaction<'env>

Dereferences the value.