CREATE TABLE IF NOT EXISTS truncate_test_set(id UInt64) ENGINE = Set; CREATE TABLE IF NOT EXISTS truncate_test_log(id UInt64) ENGINE = Log; CREATE TABLE IF NOT EXISTS truncate_test_memory(id UInt64) ENGINE = Memory; CREATE TABLE IF NOT EXISTS truncate_test_tiny_log(id UInt64) ENGINE = TinyLog; CREATE TABLE IF NOT EXISTS truncate_test_stripe_log(id UInt64) ENGINE = StripeLog; CREATE TABLE IF NOT EXISTS truncate_test_merge_tree(p Date, k UInt64) ENGINE = MergeTree ORDER BY p; SELECT '======Before Truncate======'; INSERT INTO truncate_test_set VALUES(0); INSERT INTO truncate_test_log VALUES(1); INSERT INTO truncate_test_memory VALUES(1); INSERT INTO truncate_test_tiny_log VALUES(1); INSERT INTO truncate_test_stripe_log VALUES(1); INSERT INTO truncate_test_merge_tree VALUES('2000-01-01', 1); SELECT * FROM system.numbers WHERE number NOT IN truncate_test_set LIMIT 1; SELECT * FROM truncate_test_log; SELECT * FROM truncate_test_memory; SELECT * FROM truncate_test_tiny_log; SELECT * FROM truncate_test_stripe_log; SELECT * FROM truncate_test_merge_tree; SELECT '======After Truncate And Empty======'; TRUNCATE ALL TABLES FROM IF EXISTS {CLICKHOUSE_DATABASE:Identifier}; SELECT * FROM system.numbers WHERE number NOT IN truncate_test_set LIMIT 1; SELECT * FROM truncate_test_log; SELECT * FROM truncate_test_memory; SELECT * FROM truncate_test_tiny_log; SELECT * FROM truncate_test_stripe_log; SELECT * FROM truncate_test_merge_tree; SELECT '======After Truncate And Insert Data======'; INSERT INTO truncate_test_set VALUES(0); INSERT INTO truncate_test_log VALUES(1); INSERT INTO truncate_test_memory VALUES(1); INSERT INTO truncate_test_tiny_log VALUES(1); INSERT INTO truncate_test_stripe_log VALUES(1); INSERT INTO truncate_test_merge_tree VALUES('2000-01-01', 1); SELECT * FROM system.numbers WHERE number NOT IN truncate_test_set LIMIT 1; SELECT * FROM truncate_test_log; SELECT * FROM truncate_test_memory; SELECT * FROM truncate_test_tiny_log; SELECT * FROM truncate_test_stripe_log; SELECT * FROM truncate_test_merge_tree;