Struct WithCacheStrategy

pub struct WithCacheStrategy<DB, Statement>
where
    DB: Backend,
{ /* private fields */ }

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Cache all (safe) statements for as long as connection is alive.

Trait Implementations

impl<DB, Statement> Default for WithCacheStrategy<DB, Statement>

where DB: Backend,

fn default() -> Self

Returns the “default value” for a type.

impl<DB, Statement> StatementCacheStrategy<DB, Statement> for WithCacheStrategy<DB, Statement>

where DB: Backend, StatementCacheKey<DB>: Hash + Eq, DB::TypeMetadata: Clone, DB::QueryBuilder: Default,

fn get( &mut self, key: StatementCacheKey<DB>, backend: &DB, source: &dyn QueryFragmentForCachedStatement<DB>, prepare_fn: &mut dyn FnMut(&str, bool) -> Result<Statement, Error>, ) -> Result<MaybeCached<'_, Statement>, Error>

Every query (which is safe to cache) will go through this function The implementation will decide whether to cache statement or not

fn cache_size(&self) -> CacheSize

Returns which prepared statement cache size is implemented by this trait