NewKey construct cache key from provided parameters with default version number.

Version must be increased with each backward-incompatible change in the cache storage.

ErrMissing is returned when the entry isn't found in the cache.

AsyncCache is a transactional cache enabled to serve the results from concurrent queries.

Key is the key for use in the cache.

Stats represents cache stats.

TmpFileResponseWriter caches Clickhouse response.

Cache stores results of executed queries identified by Key.

TransactionRegistry is a registry of ongoing queries identified by Key.