DROP TABLE IF EXISTS t_block_number_delete sync; SET mutations_sync = 2; CREATE TABLE t_block_number_delete (x UInt32, ts DateTime) ENGINE = MergeTree ORDER BY x SETTINGS enable_block_number_column = 1, min_bytes_for_wide_part = 1; INSERT INTO t_block_number_delete SELECT number, now() - INTERVAL number minute from numbers(10); OPTIMIZE TABLE t_block_number_delete final; ALTER TABLE t_block_number_delete DELETE WHERE x < 2; SELECT count(), sum(x) FROM t_block_number_delete; SELECT command, is_done, latest_fail_reason FROM system.mutations WHERE database = currentDatabase() AND table = 't_block_number_delete'; SELECT column, count() FROM system.parts_columns WHERE database = currentDatabase() AND table = 't_block_number_delete' AND active GROUP BY column ORDER BY column; DETACH TABLE t_block_number_delete; ATTACH TABLE t_block_number_delete; SELECT count(), sum(x) FROM t_block_number_delete; SELECT command, is_done, latest_fail_reason FROM system.mutations WHERE database = currentDatabase() AND table = 't_block_number_delete'; SELECT column, count() FROM system.parts_columns WHERE database = currentDatabase() AND table = 't_block_number_delete' AND active GROUP BY column ORDER BY column; DROP TABLE t_block_number_delete; CREATE TABLE t_block_number_delete (x UInt32, ts DateTime) ENGINE = MergeTree ORDER BY x SETTINGS enable_block_number_column = 1, min_bytes_for_wide_part = '10G'; INSERT INTO t_block_number_delete SELECT number, now() - INTERVAL number minute from numbers(10); OPTIMIZE TABLE t_block_number_delete final; ALTER TABLE t_block_number_delete DELETE WHERE x < 2; SELECT count(), sum(x) FROM t_block_number_delete; SELECT command, is_done, latest_fail_reason FROM system.mutations WHERE database = currentDatabase() AND table = 't_block_number_delete'; SELECT column, count() FROM system.parts_columns WHERE database = currentDatabase() AND table = 't_block_number_delete' AND active GROUP BY column ORDER BY column; DETACH TABLE t_block_number_delete; ATTACH TABLE t_block_number_delete; SELECT count(), sum(x) FROM t_block_number_delete; SELECT command, is_done, latest_fail_reason FROM system.mutations WHERE database = currentDatabase() AND table = 't_block_number_delete'; SELECT column, count() FROM system.parts_columns WHERE database = currentDatabase() AND table = 't_block_number_delete' AND active GROUP BY column ORDER BY column; DROP TABLE t_block_number_delete;