Struct rdms::Entry

pub struct Entry<K, V> where
    K: Clone + Ord,
    V: Clone + Diff,  { /* fields omitted */ }

Entry is the covering structure for a {Key, value} pair indexed by rdms data structures.

It is a user facing structure, also used in stitching together different components of [Rdms].

Methods

impl<K, V> Entry<K, V> where
    K: Clone + Ord,
    V: Clone + Diff, 

pub const KEY_SIZE_LIMIT: usize

pub const DIFF_SIZE_LIMIT: usize

pub const VALUE_SIZE_LIMIT: usize

impl<K, V> Entry<K, V> where
    K: Clone + Ord,
    V: Clone + Diff + From<<V as Diff>::D>, 

Important traits for VersionIter<K, V>

impl<K, V> Iterator for VersionIter<K, V> where
    K: Clone + Ord,
    V: Clone + Diff + From<<V as Diff>::D>,  type Item = Entry<K, V>;

pub fn versions(&self) -> VersionIter<K, V>

Return an iterator for all existing versions for this entry.

impl<K, V> Entry<K, V> where
    K: Clone + Ord,
    V: Clone + Diff, 

pub fn as_key(&self) -> &K

Return a reference to key.

pub fn to_key(&self) -> K

Return owned key vlalue.

pub fn to_native_value(&self) -> Option<V>

Return value. If entry is marked as deleted, return None.

pub fn to_seqno(&self) -> u64

Return the latest seqno that created/updated/deleted this entry.

pub fn to_seqno_state(&self) -> (bool, u64)

Return the seqno and the state of modification. true means latest value was a create/update, and false means latest value was deleted.

pub fn is_deleted(&self) -> bool

Return whether this entry is in deleted state, applicable onle in lsm mode.

impl<K, V> Entry<K, V> where
    K: Clone + Ord + Footprint,
    V: Clone + Diff + Footprint, 

pub fn footprint(&self) -> isize

Return the previous versions of this entry as Deltas.

Trait Implementations

impl<K: Clone, V: Clone> Clone for Entry<K, V> where
    K: Clone + Ord,
    V: Clone + Diff, 

fn clone(&self) -> Entry<K, V>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.