Struct QueryPlanCache 

pub struct QueryPlanCache { /* private fields */ }

Generic type-erased cache for storing parsed AST and plans This intentionally avoids caching results - plans are still executed

Implementations

impl QueryPlanCache

pub fn new(max_size: usize) -> Self

Create a new cache with specified max size

pub fn get(&self, signature: &QuerySignature) -> Option<String>

Check if query is in cache and update statistics

pub fn insert(&self, signature: QuerySignature, sql: String)

Insert plan into cache with table metadata, evicting LRU entry if at capacity The sql should be the normalized original query

pub fn insert_with_tables( &self, signature: QuerySignature, sql: String, tables: HashSet<String>, )

Insert plan with explicit table dependencies for better invalidation

pub fn contains(&self, signature: &QuerySignature) -> bool

Check if signature is cached

pub fn clear(&self)

Clear all cached plans

pub fn invalidate_table(&self, table: &str)

Invalidate all plans referencing a table

pub fn stats(&self) -> CacheStats

Get cache statistics

pub fn max_size(&self) -> usize

Get maximum cache size