Module cache 

Cache layer for liquid cache.

Re-exports

pub use policies::AlwaysHydrate;

pub use policies::CachePolicy;

pub use policies::HydrationPolicy;

pub use policies::HydrationRequest;

pub use policies::LiquidPolicy;

pub use policies::MaterializedEntry;

pub use policies::NoHydration;

pub use policies::SqueezePolicy;

pub use policies::TranscodeSqueezeEvict;

Modules

cache_policies

Legacy path: re-export cache policy types under cache::cache_policies.

hydration_policies

Legacy path: re-export hydration policy types under cache::hydration_policies.

policies

Policy modules for cache eviction, hydration, and squeezing.

squeeze_policies

Legacy path: re-export squeeze policy types under cache::squeeze_policies.

Structs

CacheFull

The cache could not reserve enough disk budget for a write.

CacheStats

Snapshot of cache statistics.

DefaultCacheMetadata

A default implementation of EntryMetadata.

DefaultSqueezeIo

A default implementation of SqueezeIoHandler backed by a t4::Store.

EntryID

EntryID is a unique identifier for a batch of rows, i.e., the cache key.

EvaluatePredicate

Builder for predicate evaluation on cached data.

EventTrace

A trace of events that occurred in the cache. This is used for testing only.

Get

Builder returned by LiquidCache::get for configuring cache reads.

Insert

Builder returned by LiquidCache::insert for configuring cache writes.

LiquidCache

Cache storage for liquid cache.

LiquidCacheBuilder

Builder for LiquidCache.

LiquidCompressorStates

States for liquid compressor.

LiquidExpr

A predicate expression validated for LiquidCache predicate evaluation.

Observer

Cache-side observer for runtime stats, debug traces, and optional cache tracing.

RuntimeStats

Atomic runtime counters for cache API calls.

RuntimeStatsSnapshot

Immutable snapshot of RuntimeStats.

VariantRequest

A typed variant path requested by a query.

Enums

CacheEntry

A cached entry storing data in various formats.

CacheExpression

Experimental expression descriptor for cache lookups.

CachedBatchType

The type of the cached batch.

Traits

EntryMetadata

Per-entry metadata used by the cache.

Functions

transcode_liquid_inner

This method is used to transcode an arrow array into a liquid array.

transcode_liquid_inner_with_hint

Transcode with an optional hint to precompute metadata (e.g., substring fingerprints).