-- TEST CACHE CREATE TABLE t1 (i Int64, j Int64) ENGINE = Memory; INSERT INTO t1 SELECT number, number FROM system.numbers LIMIT 100; CREATE TABLE t2 (k Int64, l Int64, m Int64, n Int64) ENGINE = Memory; CREATE MATERIALIZED VIEW mv1 TO t2 AS WITH (SELECT max(i) FROM t1) AS t1 SELECT t1 as k, -- Using local cache x 4 t1 as l, t1 as m, t1 as n FROM t1 LIMIT 5; set allow_experimental_analyzer = 0; -- FIRST INSERT INSERT INTO t1 WITH (SELECT max(i) FROM t1) AS t1 SELECT number as i, t1 + t1 + t1 AS j -- Using global cache FROM system.numbers LIMIT 100 SETTINGS min_insert_block_size_rows=5, max_insert_block_size=5, min_insert_block_size_rows_for_materialized_views=5, max_block_size=5, max_threads=1; SELECT k, l, m, n, count() FROM t2 GROUP BY k, l, m, n ORDER BY k, l, m, n; SYSTEM FLUSH LOGS; -- The main query should have a cache miss and 3 global hits -- The MV is executed 20 times (100 / 5) and each run does 1 miss and 4 hits to the LOCAL cache -- In addition to this, to prepare the MV, there is an extra preparation to get the list of columns via -- InterpreterSelectQuery, which adds 5 miss (since we don't use cache for preparation) -- So in total we have: -- Main query: 1 miss, 3 global -- Preparation: 5 miss -- Blocks (20): 20 miss, 0 global, 80 local hits -- TOTAL: 26 miss, 3 global, 80 local SELECT '02177_MV', ProfileEvents['ScalarSubqueriesGlobalCacheHit'] as scalar_cache_global_hit, ProfileEvents['ScalarSubqueriesLocalCacheHit'] as scalar_cache_local_hit, ProfileEvents['ScalarSubqueriesCacheMiss'] as scalar_cache_miss FROM system.query_log WHERE current_database = currentDatabase() AND type = 'QueryFinish' AND query LIKE '-- FIRST INSERT\nINSERT INTO t1\n%' AND event_date >= yesterday() AND event_time > now() - interval 10 minute; truncate table t2; set allow_experimental_analyzer = 1; -- FIRST INSERT ANALYZER INSERT INTO t1 WITH (SELECT max(i) FROM t1) AS t1 SELECT number as i, t1 + t1 + t1 AS j -- Using global cache FROM system.numbers LIMIT 100 SETTINGS min_insert_block_size_rows=5, max_insert_block_size=5, min_insert_block_size_rows_for_materialized_views=5, max_block_size=5, max_threads=1; SELECT k, l, m, n, count() FROM t2 GROUP BY k, l, m, n ORDER BY k, l, m, n; SYSTEM FLUSH LOGS; SELECT '02177_MV', ProfileEvents['ScalarSubqueriesGlobalCacheHit'] as scalar_cache_global_hit, ProfileEvents['ScalarSubqueriesLocalCacheHit'] as scalar_cache_local_hit, ProfileEvents['ScalarSubqueriesCacheMiss'] as scalar_cache_miss FROM system.query_log WHERE current_database = currentDatabase() AND type = 'QueryFinish' AND query LIKE '-- FIRST INSERT ANALYZER\nINSERT INTO t1\n%' AND event_date >= yesterday() AND event_time > now() - interval 10 minute; DROP TABLE mv1; set allow_experimental_analyzer = 0; CREATE TABLE t3 (z Int64) ENGINE = Memory; CREATE MATERIALIZED VIEW mv2 TO t3 AS SELECT -- This includes an unnecessarily complex query to verify that the local cache is used (since it uses t1) sum(i) + sum(j) + (SELECT * FROM (SELECT min(i) + min(j) FROM (SELECT * FROM system.one _a, t1 _b))) AS z FROM t1; -- SECOND INSERT INSERT INTO t1 SELECT 0 as i, number as j from numbers(100) SETTINGS min_insert_block_size_rows=5, max_insert_block_size=5, min_insert_block_size_rows_for_materialized_views=5, max_block_size=5, max_threads=1; SELECT * FROM t3 ORDER BY z ASC; SYSTEM FLUSH LOGS; SELECT '02177_MV_2', ProfileEvents['ScalarSubqueriesGlobalCacheHit'] as scalar_cache_global_hit, ProfileEvents['ScalarSubqueriesLocalCacheHit'] as scalar_cache_local_hit, ProfileEvents['ScalarSubqueriesCacheMiss'] as scalar_cache_miss FROM system.query_log WHERE current_database = currentDatabase() AND type = 'QueryFinish' AND query LIKE '-- SECOND INSERT\nINSERT INTO t1%' AND event_date >= yesterday() AND event_time > now() - interval 10 minute; truncate table t3; set allow_experimental_analyzer = 1; -- SECOND INSERT ANALYZER INSERT INTO t1 SELECT 0 as i, number as j from numbers(100) SETTINGS min_insert_block_size_rows=5, max_insert_block_size=5, min_insert_block_size_rows_for_materialized_views=5, max_block_size=5, max_threads=1; SELECT * FROM t3 ORDER BY z ASC; SYSTEM FLUSH LOGS; SELECT '02177_MV_2', ProfileEvents['ScalarSubqueriesGlobalCacheHit'] as scalar_cache_global_hit, ProfileEvents['ScalarSubqueriesLocalCacheHit'] as scalar_cache_local_hit, ProfileEvents['ScalarSubqueriesCacheMiss'] as scalar_cache_miss FROM system.query_log WHERE current_database = currentDatabase() AND type = 'QueryFinish' AND query LIKE '-- SECOND INSERT ANALYZER\nINSERT INTO t1%' AND event_date >= yesterday() AND event_time > now() - interval 10 minute; DROP TABLE mv2; set allow_experimental_analyzer = 0; CREATE TABLE t4 (z Int64) ENGINE = Memory; CREATE MATERIALIZED VIEW mv3 TO t4 AS SELECT -- This includes an unnecessarily complex query but now it uses t2 so it can be cached min(i) + min(j) + (SELECT * FROM (SELECT min(k) + min(l) FROM (SELECT * FROM system.one _a, t2 _b))) AS z FROM t1; -- THIRD INSERT INSERT INTO t1 SELECT number as i, number as j from numbers(100) SETTINGS min_insert_block_size_rows=5, max_insert_block_size=5, min_insert_block_size_rows_for_materialized_views=5, max_block_size=5, max_threads=1; SYSTEM FLUSH LOGS; SELECT * FROM t4 ORDER BY z ASC; SELECT '02177_MV_3', ProfileEvents['ScalarSubqueriesGlobalCacheHit'] as scalar_cache_global_hit, ProfileEvents['ScalarSubqueriesLocalCacheHit'] as scalar_cache_local_hit, ProfileEvents['ScalarSubqueriesCacheMiss'] as scalar_cache_miss FROM system.query_log WHERE current_database = currentDatabase() AND type = 'QueryFinish' AND query LIKE '-- THIRD INSERT\nINSERT INTO t1%' AND event_date >= yesterday() AND event_time > now() - interval 10 minute; truncate table t4; set allow_experimental_analyzer = 1; -- THIRD INSERT ANALYZER INSERT INTO t1 SELECT number as i, number as j from numbers(100) SETTINGS min_insert_block_size_rows=5, max_insert_block_size=5, min_insert_block_size_rows_for_materialized_views=5, max_block_size=5, max_threads=1; SYSTEM FLUSH LOGS; SELECT * FROM t4 ORDER BY z ASC; SELECT '02177_MV_3', ProfileEvents['ScalarSubqueriesGlobalCacheHit'] as scalar_cache_global_hit, ProfileEvents['ScalarSubqueriesLocalCacheHit'] as scalar_cache_local_hit, ProfileEvents['ScalarSubqueriesCacheMiss'] as scalar_cache_miss FROM system.query_log WHERE current_database = currentDatabase() AND type = 'QueryFinish' AND query LIKE '-- THIRD INSERT ANALYZER\nINSERT INTO t1%' AND event_date >= yesterday() AND event_time > now() - interval 10 minute; DROP TABLE mv3; DROP TABLE t1; DROP TABLE t2; DROP TABLE t3; DROP TABLE t4;