Module cte_cache 

CTE Results Cache Manager Module

CTE (Common Table Expression) query result caching function. Avoid repeated calculation of same CTE to improve query performance.

Caching policy

• LRU elimination policy: eliminate the longest unused entries when the cache is full
• Memory budget management: tightly control the upper limit of memory used by the cache
• Intelligent caching decision: decide whether to cache or not based on CTE characteristics

Applicable scenarios

1. Recursive CTEs are referenced multiple times
2. Complex subqueries are used multiple times in a single query
3. Medium-sized result set (100-10,000 rows)
4. CTE is deterministic (no random functions, etc.)

The module was split from the original single cte_cache.rs into focused submodules:

• entry: the CteCacheEntry cache-row type
• manager: the CteCacheManager store / eviction engine
• decision: the CteCacheDecisionMaker cache-policy evaluator

Re-exports

pub use decision::CteCacheDecision;

pub use decision::CteCacheDecisionMaker;

pub use entry::CteCacheEntry;

pub use manager::CteCacheManager;

Modules

decision

entry

manager