Module cache 

Query cache for parsed and planned queries.

This module provides an LRU cache for query plans to avoid repeated parsing and optimization of frequently executed queries.

Cache Levels

• Parsed cache: Caches logical plans after translation (language-specific parsing)
• Optimized cache: Caches logical plans after optimization

Usage

use grafeo_engine::query::cache::{QueryCache, CacheKey};
use grafeo_engine::query::processor::QueryLanguage;
use grafeo_engine::query::plan::{LogicalPlan, LogicalOperator};

let cache = QueryCache::new(1000);
let cache_key = CacheKey::new("MATCH (n) RETURN n", QueryLanguage::Gql);

// Check cache first
if let Some(plan) = cache.get_optimized(&cache_key) {
    // use cached plan
}

// Parse and optimize, then cache
let plan = LogicalPlan::new(LogicalOperator::Empty);
cache.put_optimized(cache_key, plan);

Structs

CacheKey

Cache key combining query text, language, and active graph.

CacheStats

Cache statistics.

CachingQueryProcessor

A caching wrapper for the query processor.

QueryCache

Query cache for parsed and optimized plans.