Struct LruQueryPlanCache 

pub struct LruQueryPlanCache { /* private fields */ }

Query plan cache with LRU eviction

Caches compiled execution plans to avoid repeated query compilation and optimization overhead.

This is the full-featured LRU implementation backed by the lru crate and SciRS2 metrics. For a simpler, self-contained cache see QueryPlanCache below.

Implementations

impl LruQueryPlanCache

pub fn new(config: CacheConfig) -> Self

Create a new query plan cache

pub fn get(&self, query: &str) -> Option<CachedPlan>

Get a cached plan for a query string

pub fn put( &self, query: &str, plan: ExecutionPlan, estimated_cost: f64, ) -> Result<(), OxirsError>

Put a compiled plan into the cache

pub fn remove(&self, query: &str) -> Option<CachedPlan>

Remove a cached plan

pub fn clear(&self) -> Result<(), OxirsError>

Clear all cached plans

pub fn statistics(&self) -> CacheStatistics

Get cache statistics

pub fn hit_rate(&self) -> f64

Get cache hit rate

pub fn persist(&self) -> Result<(), OxirsError>

Persist cache to disk

pub fn load(&self) -> Result<(), OxirsError>

Load cache from disk

pub fn update_execution_time( &self, query: &str, execution_time_ms: f64, ) -> Result<(), OxirsError>

Update execution time for a cached plan