Trait Transaction

pub trait Transaction: SkipList {
    // Provided methods
    fn iter<'a, K, V>(
        &'a self,
        db: &'a Db<K, V>,
        key: Option<(K, Option<V>)>,
    ) -> Cursor<'a, Self, K, V>
       where K: Representable,
             V: Representable { ... }
    fn rev_iter<'a, K, V>(
        &'a self,
        db: &'a Db<K, V>,
        key: Option<(K, Option<V>)>,
    ) -> RevCursor<'a, Self, K, V>
       where K: Representable,
             V: Representable { ... }
    fn root<K, V>(&mut self, root: usize) -> Option<Db<K, V>>
       where K: Representable,
             V: Representable { ... }
    fn get<'a, K, V>(
        &'a self,
        root: &Db<K, V>,
        key: K,
        value: Option<V>,
    ) -> Option<V>
       where K: Representable,
             V: Representable { ... }
}

Trait for operations common to mutable and immutable transactions.

Provided Methods

fn iter<'a, K, V>( &'a self, db: &'a Db<K, V>, key: Option<(K, Option<V>)>, ) -> Cursor<'a, Self, K, V>

where K: Representable, V: Representable,

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).

fn rev_iter<'a, K, V>( &'a self, db: &'a Db<K, V>, key: Option<(K, Option<V>)>, ) -> RevCursor<'a, Self, K, V>

where K: Representable, V: Representable,

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 root<K, V>(&mut self, root: usize) -> Option<Db<K, V>>

where K: Representable, V: Representable,

Gets the specified root. At most 508 different roots are allowed.

fn get<'a, K, V>( &'a self, root: &Db<K, V>, key: K, value: Option<V>, ) -> Option<V>

where K: Representable, V: Representable,

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.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<'env> Transaction for Txn<'env>

impl<'env, T> Transaction for MutTxn<'env, T>