Method evict_oldest

src/cache/statement_pool.rs:216–224

Evict the oldest entry from the cache

(&self, statements: &mut HashMap<String, CachedStatement>)

    /// Evict the oldest entry from the cache
    fn evict_oldest(&self, statements: &mut HashMap<String, CachedStatement>) {
        if let Some((oldest_key, _)) = statements
            .iter()
            .min_by_key(|(_, cached)| cached.last_used)
            .map(|(k, v)| (k.clone(), v.last_used))
        {
            statements.remove(&oldest_key);
        }
    }

    /// Update the last used time for a cached statement
    pub fn touch(&self, query: &str) {