Struct QueryCacheManager 

pub struct QueryCacheManager { /* private fields */ }

Combines CacheFingerprint computation with LruQueryCache for easy use: supply an &Algebra and get (or compute) a cached string plan.

Implementations

impl QueryCacheManager

pub fn new(max_size: usize) -> Self

Create a new manager with the given cache capacity.

pub fn get_or_insert( &mut self, algebra: &Algebra, compute: impl FnOnce() -> String, ) -> String

Return the cached plan for algebra, or compute it with compute and insert it.

Returns a clone of the (possibly just-inserted) plan string.

pub fn stats(&self) -> CacheManagerStats

Return a snapshot of cache statistics.

pub fn evict_oldest(&mut self)

Evict the oldest entry from the cache.

pub fn clear(&mut self)

Clear the cache.

pub fn len(&self) -> usize

Number of cached plans.

pub fn is_empty(&self) -> bool

Whether the cache is empty.