-- Tags: no-parallel -- Tag no-parallel: Messes with internal cache -- Start with empty query cache QC SYSTEM DROP QUERY CACHE; SELECT 1 SETTINGS use_query_cache = true; SELECT 1 SETTINGS use_query_cache = true; SYSTEM FLUSH LOGS; SELECT ProfileEvents['QueryCacheHits'], ProfileEvents['QueryCacheMisses'] FROM system.query_log WHERE type = 'QueryFinish' AND current_database = currentDatabase() AND query = 'SELECT 1 SETTINGS use_query_cache = true;' ORDER BY event_time_microseconds; -- (The 1st execution was a cache miss, the 2nd execution was a cache hit) SYSTEM DROP QUERY CACHE;