DROP TABLE IF EXISTS mt_01451; CREATE TABLE mt_01451 (v UInt8) ENGINE = MergeTree() order by tuple() SETTINGS old_parts_lifetime=0; SYSTEM STOP MERGES mt_01451; INSERT INTO mt_01451 VALUES (0); INSERT INTO mt_01451 VALUES (1); INSERT INTO mt_01451 VALUES (2); SELECT v FROM mt_01451 ORDER BY v; ALTER TABLE mt_01451 DETACH PART 'all_100_100_0'; -- { serverError 232 } ALTER TABLE mt_01451 DETACH PART 'all_2_2_0'; SELECT v FROM mt_01451 ORDER BY v; SELECT name FROM system.detached_parts WHERE table = 'mt_01451' AND database = currentDatabase(); ALTER TABLE mt_01451 ATTACH PART 'all_2_2_0'; SELECT v FROM mt_01451 ORDER BY v; SELECT name FROM system.detached_parts WHERE table = 'mt_01451' AND database = currentDatabase(); SELECT '-- drop part --'; ALTER TABLE mt_01451 DROP PART 'all_4_4_0'; ALTER TABLE mt_01451 ATTACH PART 'all_4_4_0'; -- { serverError 233 } SELECT v FROM mt_01451 ORDER BY v; SELECT name FROM system.parts WHERE table = 'mt_01451' AND active AND database = currentDatabase(); SELECT '-- resume merges --'; SYSTEM START MERGES mt_01451; OPTIMIZE TABLE mt_01451 FINAL; SELECT v FROM mt_01451 ORDER BY v; SELECT name FROM system.parts WHERE table = 'mt_01451' AND active AND database = currentDatabase(); DROP TABLE mt_01451;