Struct DefaultCacheMetadata 

pub struct DefaultCacheMetadata { /* private fields */ }

A default implementation of EntryMetadata.

All entries share a single LiquidCompressorStates and squeeze hints are stored in a flat map keyed by EntryID.

Implementations

impl DefaultCacheMetadata

pub fn new() -> Self

Create a new instance of DefaultCacheMetadata.

Trait Implementations

impl Debug for DefaultCacheMetadata

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

Formats the value using the given formatter.

impl Default for DefaultCacheMetadata

fn default() -> DefaultCacheMetadata

Returns the “default value” for a type.

impl EntryMetadata for DefaultCacheMetadata

fn add_squeeze_hint(&self, entry_id: &EntryID, expression: Arc<CacheExpression>)

Add a squeeze hint for an entry.

fn squeeze_hint(&self, entry_id: &EntryID) -> Option<Arc<CacheExpression>>

Get the squeeze hint for an entry. If None, the entry will be evicted to disk entirely. If Some, the entry will be squeezed according to the cache expressions previously recorded for this column. For example, if expression is ExtractDate32 { field: Date32Field::Year }, the entry will be squeezed to a crate::liquid_array::SqueezedDate32Array with the year component (Date32 or Timestamp input).

fn get_compressor(&self, _entry_id: &EntryID) -> Arc<LiquidCompressorStates>

Get the compressor for an entry.