pub struct DictionaryEncoder<V: Hash + Eq + Clone> { /* private fields */ }Expand description
Dictionary encoder for column compression.
Encodes values as compact integer codes using a codebook.
Implementations§
Source§impl<V: Hash + Eq + Clone> DictionaryEncoder<V>
impl<V: Hash + Eq + Clone> DictionaryEncoder<V>
Sourcepub fn encode(&mut self, value: V) -> u32
pub fn encode(&mut self, value: V) -> u32
Encode a single value, returning its code.
If the value is new, it’s added to the dictionary.
Sourcepub fn encode_batch(&mut self, values: &[V]) -> Vec<u32>
pub fn encode_batch(&mut self, values: &[V]) -> Vec<u32>
Encode a batch of values.
Sourcepub fn decode_batch(&self, codes: &[u32]) -> Vec<V>
pub fn decode_batch(&self, codes: &[u32]) -> Vec<V>
Decode a batch of codes.
Sourcepub fn stats(&self) -> CompressionStats
pub fn stats(&self) -> CompressionStats
Get compression statistics.
Sourcepub fn codebook(&self) -> &DictCodebook<V>
pub fn codebook(&self) -> &DictCodebook<V>
Get the codebook.
Trait Implementations§
Source§impl<V: Clone + Hash + Eq + Clone> Clone for DictionaryEncoder<V>
impl<V: Clone + Hash + Eq + Clone> Clone for DictionaryEncoder<V>
Source§fn clone(&self) -> DictionaryEncoder<V>
fn clone(&self) -> DictionaryEncoder<V>
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moreAuto Trait Implementations§
impl<V> Freeze for DictionaryEncoder<V>
impl<V> RefUnwindSafe for DictionaryEncoder<V>where
V: RefUnwindSafe,
impl<V> Send for DictionaryEncoder<V>where
V: Send,
impl<V> Sync for DictionaryEncoder<V>where
V: Sync,
impl<V> Unpin for DictionaryEncoder<V>where
V: Unpin,
impl<V> UnwindSafe for DictionaryEncoder<V>where
V: UnwindSafe,
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