*** Not partitioned *** Parts before OPTIMIZE: tuple() all_1_1_0_1 tuple() all_2_2_0_2 Parts after OPTIMIZE: tuple() all_1_2_1_2 Sum before DETACH PARTITION: 15 Sum after DETACH PARTITION: 0 system.detached_parts after DETACH PARTITION: default not_partitioned all all_1_2_1_2 default 1 2 1 *** Partitioned by week *** Parts before OPTIMIZE: 1999-12-27 19991227_1_1_0_1 2000-01-03 20000103_2_2_0_2 2000-01-03 20000103_3_3_0_3 Parts after OPTIMIZE: 1999-12-27 19991227_1_1_0_1 2000-01-03 20000103_2_3_1_3 Sum before DROP PARTITION: 15 Sum after DROP PARTITION: 12 *** Partitioned by a (Date, UInt8) tuple *** Parts before OPTIMIZE: (\'2000-01-01\',1) 20000101-1_1_1_0_1 (\'2000-01-01\',1) 20000101-1_5_5_0_5 (\'2000-01-01\',2) 20000101-2_2_2_0_2 (\'2000-01-02\',1) 20000102-1_3_3_0_3 (\'2000-01-02\',1) 20000102-1_4_4_0_4 Parts after OPTIMIZE: (\'2000-01-01\',1) 20000101-1_1_5_1_5 (\'2000-01-01\',2) 20000101-2_2_2_0_2 (\'2000-01-02\',1) 20000102-1_3_4_1_4 Sum before DETACH PARTITION: 15 Sum after DETACH PARTITION: 9 *** Partitioned by String *** Parts before OPTIMIZE: bbb 7d878f3d88441d2b3dc371e2a3050f6d_2_2_0_2 bbb 7d878f3d88441d2b3dc371e2a3050f6d_3_3_0_3 aaa 9b50856126a8a6064f11f027d455bf58_1_1_0_1 aaa 9b50856126a8a6064f11f027d455bf58_4_4_0_4 Parts after OPTIMIZE: bbb 7d878f3d88441d2b3dc371e2a3050f6d_2_2_0_2 bbb 7d878f3d88441d2b3dc371e2a3050f6d_3_3_0_3 aaa 9b50856126a8a6064f11f027d455bf58_1_4_1_4 Sum before DROP PARTITION: 15 Sum after DROP PARTITION: 8 *** Table without columns with fixed size *** Parts: 1 1_1_1_0_1 2 2 2_2_2_0_2 2 Before DROP PARTITION: a aa b cc After DROP PARTITION: aa cc