purge configuration, 3129 purge lag, 6178 PURGE MASTER LOGS, 2740 purge scheduling, 3129 purge thread, 6178 Purging old relay logs thread state, 1850 pushdown joins (NDB), 4180 Python, 5218, 6178 third-party driver, 5220 Python API, 6178 Q Qcache_free_blocks removed features, 44 Qcache_free_memory removed features, 44 Qcache_inserts removed features, 44, 44 Qcache_lowmem_prunes removed features, 44 Qcache_not_cached removed features, 44 Qcache_queries_in_cache removed features, 44 Qcache_total_blocks removed features, 44 QUARTER(), 2161 queries entering, 304 estimating performance, 1779 examples, 328 speed of, 1640 Queries status variable, 963 Query thread command, 1846 query, 6178 query attributes, 1919 query cache and ndbinfo database tables, 4522 removed features, 43 query cast injection new features, 32 query end thread state, 1850 query execution plan, 6178 query expansion, 2212 query option mysqlslap, 550 ndb_config, 4286, 4286 ndb_index_stat, 4342 query rewrite plugins ddl_rewriter, 1095 5519