Struct redb::Table

pub struct Table<'db, 'txn, K: RedbKey + ?Sized + 'txn, V: RedbValue + ?Sized + 'txn> { /* private fields */ }

A table containing key-value mappings

Implementations

impl<'db, 'txn, K: RedbKey + ?Sized + 'txn, V: RedbValue + ?Sized + 'txn> Table<'db, 'txn, K, V>

pub fn insert<'a, 'b: 'a, AK, AV>(
    &mut self,
    key: &'a AK,
    value: &'a AV
) -> Result<Option<AccessGuard<'_, V>>, Error>where
    K: 'b,
    V: 'b,
    AK: Borrow<K::RefBaseType<'b>> + ?Sized,
    AV: Borrow<V::RefBaseType<'b>> + ?Sized,

Insert mapping of the given key to the given value

Returns the old value, if the key was present in the table

pub fn insert_reserve<'a, 'b: 'a, AK>(
    &mut self,
    key: &'a AK,
    value_length: usize
) -> Result<AccessGuardMut<'_, K, &[u8]>, Error>where
    K: 'b,
    AK: Borrow<K::RefBaseType<'b>> + ?Sized,

Reserve space to insert a key-value pair The returned reference will have length equal to value_length

pub fn remove<'a, 'b: 'a, AK>(
    &mut self,
    key: &'a AK
) -> Result<Option<AccessGuard<'_, V>>, Error>where
    K: 'b,
    AK: Borrow<K::RefBaseType<'b>> + ?Sized,

Removes the given key

Returns the old value, if the key was present in the table

Trait Implementations

impl<'db, 'txn, K: RedbKey + ?Sized, V: RedbValue + ?Sized> Drop for Table<'db, 'txn, K, V>

fn drop(&mut self)

Executes the destructor for this type.

impl<'db, 'txn, K: RedbKey + ?Sized, V: RedbValue + ?Sized> ReadableTable<K, V> for Table<'db, 'txn, K, V>

fn get<'a, 'b: 'a, AK>(
    &self,
    key: &'a AK
) -> Result<Option<AccessGuard<'_, V>>, Error>where
    K: 'b,
    AK: Borrow<K::RefBaseType<'b>> + ?Sized,

Returns the value corresponding to the given key

fn range<'a, KR>(
    &'a self,
    range: impl RangeBounds<KR> + 'a
) -> Result<RangeIter<'a, K, V>, Error>where
    K: 'a,
    KR: Borrow<K::RefBaseType<'a>> + ?Sized + 'a,

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

fn len(&self) -> Result<usize, Error>

Returns the number of entries in the table

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

Returns true if the table is empty

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

Returns a double-ended iterator over all elements in the table