SELECT '*** Not partitioned ***'; DROP TABLE IF EXISTS test.not_partitioned; CREATE TABLE test.not_partitioned(x UInt8) ENGINE MergeTree ORDER BY x; INSERT INTO test.not_partitioned VALUES (1), (2), (3); INSERT INTO test.not_partitioned VALUES (4), (5); SELECT 'Parts before OPTIMIZE:'; SELECT partition, name FROM system.parts WHERE database = 'test' AND table = 'not_partitioned' AND active ORDER BY name; OPTIMIZE TABLE test.not_partitioned PARTITION tuple() FINAL; SELECT 'Parts after OPTIMIZE:'; SELECT partition, name FROM system.parts WHERE database = 'test' AND table = 'not_partitioned' AND active ORDER BY name; SELECT 'Sum before DETACH PARTITION:'; SELECT sum(x) FROM test.not_partitioned; ALTER TABLE test.not_partitioned DETACH PARTITION ID 'all'; SELECT 'Sum after DETACH PARTITION:'; SELECT sum(x) FROM test.not_partitioned; DROP TABLE test.not_partitioned; SELECT '*** Partitioned by week ***'; DROP TABLE IF EXISTS test.partitioned_by_week; CREATE TABLE test.partitioned_by_week(d Date, x UInt8) ENGINE = MergeTree PARTITION BY toMonday(d) ORDER BY x; -- 2000-01-03 belongs to a different week than 2000-01-01 and 2000-01-02 INSERT INTO test.partitioned_by_week VALUES ('2000-01-01', 1), ('2000-01-02', 2), ('2000-01-03', 3); INSERT INTO test.partitioned_by_week VALUES ('2000-01-03', 4), ('2000-01-03', 5); SELECT 'Parts before OPTIMIZE:'; SELECT partition, name FROM system.parts WHERE database = 'test' AND table = 'partitioned_by_week' AND active ORDER BY name; OPTIMIZE TABLE test.partitioned_by_week PARTITION '2000-01-03' FINAL; SELECT 'Parts after OPTIMIZE:'; SELECT partition, name FROM system.parts WHERE database = 'test' AND table = 'partitioned_by_week' AND active ORDER BY name; SELECT 'Sum before DROP PARTITION:'; SELECT sum(x) FROM test.partitioned_by_week; ALTER TABLE test.partitioned_by_week DROP PARTITION '1999-12-27'; SELECT 'Sum after DROP PARTITION:'; SELECT sum(x) FROM test.partitioned_by_week; DROP TABLE test.partitioned_by_week; SELECT '*** Partitioned by a (Date, UInt8) tuple ***'; DROP TABLE IF EXISTS test.partitioned_by_tuple; CREATE TABLE test.partitioned_by_tuple(d Date, x UInt8, y UInt8) ENGINE MergeTree ORDER BY x PARTITION BY (d, x); INSERT INTO test.partitioned_by_tuple VALUES ('2000-01-01', 1, 1), ('2000-01-01', 2, 2), ('2000-01-02', 1, 3); INSERT INTO test.partitioned_by_tuple VALUES ('2000-01-02', 1, 4), ('2000-01-01', 1, 5); SELECT 'Parts before OPTIMIZE:'; SELECT partition, name FROM system.parts WHERE database = 'test' AND table = 'partitioned_by_tuple' AND active ORDER BY name; OPTIMIZE TABLE test.partitioned_by_tuple PARTITION ('2000-01-01', 1) FINAL; OPTIMIZE TABLE test.partitioned_by_tuple PARTITION ('2000-01-02', 1) FINAL; SELECT 'Parts after OPTIMIZE:'; SELECT partition, name FROM system.parts WHERE database = 'test' AND table = 'partitioned_by_tuple' AND active ORDER BY name; SELECT 'Sum before DETACH PARTITION:'; SELECT sum(y) FROM test.partitioned_by_tuple; ALTER TABLE test.partitioned_by_tuple DETACH PARTITION ID '20000101-1'; SELECT 'Sum after DETACH PARTITION:'; SELECT sum(y) FROM test.partitioned_by_tuple; DROP TABLE test.partitioned_by_tuple; SELECT '*** Partitioned by String ***'; DROP TABLE IF EXISTS test.partitioned_by_string; CREATE TABLE test.partitioned_by_string(s String, x UInt8) ENGINE = MergeTree PARTITION BY s ORDER BY x; INSERT INTO test.partitioned_by_string VALUES ('aaa', 1), ('aaa', 2), ('bbb', 3); INSERT INTO test.partitioned_by_string VALUES ('bbb', 4), ('aaa', 5); SELECT 'Parts before OPTIMIZE:'; SELECT partition, name FROM system.parts WHERE database = 'test' AND table = 'partitioned_by_string' AND active ORDER BY name; OPTIMIZE TABLE test.partitioned_by_string PARTITION 'aaa' FINAL; SELECT 'Parts after OPTIMIZE:'; SELECT partition, name FROM system.parts WHERE database = 'test' AND table = 'partitioned_by_string' AND active ORDER BY name; SELECT 'Sum before DROP PARTITION:'; SELECT sum(x) FROM test.partitioned_by_string; ALTER TABLE test.partitioned_by_string DROP PARTITION 'bbb'; SELECT 'Sum after DROP PARTITION:'; SELECT sum(x) FROM test.partitioned_by_string; DROP TABLE test.partitioned_by_string; SELECT '*** Table without columns with fixed size ***'; DROP TABLE IF EXISTS test.without_fixed_size_columns; CREATE TABLE test.without_fixed_size_columns(s String) ENGINE MergeTree PARTITION BY length(s) ORDER BY s; INSERT INTO test.without_fixed_size_columns VALUES ('a'), ('aa'), ('b'), ('cc'); SELECT 'Parts:'; SELECT partition, name, rows FROM system.parts WHERE database = 'test' AND table = 'without_fixed_size_columns' AND active ORDER BY name; SELECT 'Before DROP PARTITION:'; SELECT * FROM test.without_fixed_size_columns ORDER BY s; ALTER TABLE test.without_fixed_size_columns DROP PARTITION 1; SELECT 'After DROP PARTITION:'; SELECT * FROM test.without_fixed_size_columns ORDER BY s; DROP TABLE test.without_fixed_size_columns;