Struct redb::MultimapTable

pub struct MultimapTable<'txn, K: Key + 'static, V: Key + 'static> { /* private fields */ }

A multimap table

Multimap tables may have multiple values associated with each key

Implementations

impl<'txn, K: Key + 'static, V: Key + 'static> MultimapTable<'txn, K, V>

pub fn insert<'k, 'v>( &mut self, key: impl Borrow<K::SelfType<'k>>, value: impl Borrow<V::SelfType<'v>> ) -> Result<bool>

Add the given value to the mapping of the key

Returns true if the key-value pair was present

pub fn remove<'k, 'v>( &mut self, key: impl Borrow<K::SelfType<'k>>, value: impl Borrow<V::SelfType<'v>> ) -> Result<bool>

Removes the given key-value pair

Returns true if the key-value pair was present

pub fn remove_all<'a>( &mut self, key: impl Borrow<K::SelfType<'a>> ) -> Result<MultimapValue<'_, V>>

Removes all values for the given key

Returns an iterator over the removed values. Values are in ascending order.

Trait Implementations

impl<'txn, K: Key + 'static, V: Key + 'static> Drop for MultimapTable<'txn, K, V>

fn drop(&mut self)

Executes the destructor for this type.

impl<K: Key + 'static, V: Key + 'static> MultimapTableHandle for MultimapTable<'_, K, V>

fn name(&self) -> &str

impl<'txn, K: Key + 'static, V: Key + 'static> ReadableMultimapTable<K, V> for MultimapTable<'txn, K, V>

fn get<'a>( &self, key: impl Borrow<K::SelfType<'a>> ) -> Result<MultimapValue<'_, V>>

Returns an iterator over all values for the given key. Values are in ascending order.

fn range<'a, KR>( &self, range: impl RangeBounds<KR> + 'a ) -> Result<MultimapRange<'_, K, V>>

where KR: Borrow<K::SelfType<'a>> + 'a,

Returns a double-ended iterator over a range of elements in the table

fn iter(&self) -> Result<MultimapRange<'_, K, V>>

Returns an double-ended iterator over all elements in the table. Values are in ascending order.

impl<'txn, K: Key + 'static, V: Key + 'static> ReadableTableMetadata for MultimapTable<'txn, K, V>

fn len(&self) -> Result<u64>

Returns the number of key-value pairs in the table

fn stats(&self) -> Result<TableStats>

Retrieves information about storage usage for the table

fn is_empty(&self) -> Result<bool>

Returns true if the table is empty