Struct redb::ReadOnlyTable

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

A read-only table

Implementations

impl<K: Key + 'static, V: Value + 'static> ReadOnlyTable<K, V>

pub fn range<'a, KR>( &self, range: impl RangeBounds<KR> ) -> Result<Range<'static, K, V>, StorageError>

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

This method is like ReadableTable::range(), but the iterator is reference counted and keeps the transaction alive until it is dropped.

Trait Implementations

impl<K: Key + 'static, V: Value + 'static> Debug for ReadOnlyTable<K, V>

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

Formats the value using the given formatter.

impl<K: Key + 'static, V: Value + 'static> ReadableTable<K, V> for ReadOnlyTable<K, V>

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

where K: 'a,

Returns the value corresponding to the given key

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

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

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

fn first( &self ) -> Result<Option<(AccessGuard<'_, K>, AccessGuard<'_, V>)>, StorageError>

Returns the first key-value pair in the table, if it exists

fn last( &self ) -> Result<Option<(AccessGuard<'_, K>, AccessGuard<'_, V>)>, StorageError>

Returns the last key-value pair in the table, if it exists

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

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

impl<K: Key + 'static, V: Value + 'static> ReadableTableMetadata for ReadOnlyTable<K, V>

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

Retrieves information about storage usage for the table

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

Returns the number of entries in the table

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

Returns true if the table is empty