Struct QueryCache 

pub struct QueryCache { /* private fields */ }

Query cache for parsed and optimized plans.

Implementations

impl QueryCache

pub fn new(capacity: usize) -> Self

Creates a new query cache with the specified capacity.

The capacity is shared between parsed and optimized caches (each gets half the capacity).

pub fn disabled() -> Self

Creates a disabled cache (for testing or when caching is not desired).

pub fn is_enabled(&self) -> bool

Returns whether caching is enabled.

pub fn get_parsed(&self, key: &CacheKey) -> Option<LogicalPlan>

Gets a parsed plan from the cache.

pub fn put_parsed(&self, key: CacheKey, plan: LogicalPlan)

Puts a parsed plan into the cache.

pub fn get_optimized(&self, key: &CacheKey) -> Option<LogicalPlan>

Gets an optimized plan from the cache.

pub fn put_optimized(&self, key: CacheKey, plan: LogicalPlan)

Puts an optimized plan into the cache.

pub fn invalidate(&self, key: &CacheKey)

Invalidates a specific query from both caches.

pub fn clear(&self)

Clears all cached entries and increments the invalidation counter (only when the cache was non-empty).

pub fn stats(&self) -> CacheStats

Returns cache statistics.

pub fn heap_memory_bytes(&self) -> (usize, usize, usize)

Estimates heap memory used by both caches.

pub fn reset_stats(&self)

Resets hit/miss counters and invalidation counter.

Trait Implementations

impl Default for QueryCache

fn default() -> Self

Returns the “default value” for a type.