DROP TABLE IF EXISTS modify_sample; SET min_insert_block_size_rows = 0, min_insert_block_size_bytes = 0; SET max_block_size = 10; CREATE TABLE modify_sample (d Date DEFAULT '2000-01-01', x UInt8) ENGINE = MergeTree PARTITION BY d ORDER BY x; INSERT INTO modify_sample (x) SELECT toUInt8(number) AS x FROM system.numbers LIMIT 256; SELECT count(), min(x), max(x), sum(x), uniqExact(x) FROM modify_sample SAMPLE 0.1; -- { serverError 141 } ALTER TABLE modify_sample MODIFY SAMPLE BY x; SELECT count(), min(x), max(x), sum(x), uniqExact(x) FROM modify_sample SAMPLE 0.1; CREATE TABLE modify_sample_replicated (d Date DEFAULT '2000-01-01', x UInt8, y UInt64) ENGINE = ReplicatedMergeTree('/clickhouse/tables/test_01430', 'modify_sample') PARTITION BY d ORDER BY (x, y); INSERT INTO modify_sample_replicated (x, y) SELECT toUInt8(number) AS x, toUInt64(number) as y FROM system.numbers LIMIT 256; SELECT count(), min(x), max(x), sum(x), uniqExact(x) FROM modify_sample_replicated SAMPLE 0.1; -- { serverError 141 } ALTER TABLE modify_sample_replicated MODIFY SAMPLE BY x; SELECT count(), min(x), max(x), sum(x), uniqExact(x) FROM modify_sample_replicated SAMPLE 0.1; DETACH TABLE modify_sample_replicated; ATTACH TABLE modify_sample_replicated; SELECT count(), min(x), max(x), sum(x), uniqExact(x) FROM modify_sample_replicated SAMPLE 0.1; ALTER TABLE modify_sample_replicated MODIFY SAMPLE BY d; -- { serverError 36 } ALTER TABLE modify_sample_replicated MODIFY SAMPLE BY y; SELECT count(), min(y), max(y), sum(y), uniqExact(y) FROM modify_sample_replicated SAMPLE 0.1; DETACH TABLE modify_sample_replicated; ATTACH TABLE modify_sample_replicated; SELECT count(), min(y), max(y), sum(y), uniqExact(y) FROM modify_sample_replicated SAMPLE 0.1; CREATE TABLE modify_sample_old (d Date DEFAULT '2000-01-01', x UInt8, y UInt64) ENGINE = MergeTree(d, (x, y), 8192); ALTER TABLE modify_sample_old MODIFY SAMPLE BY x; -- { serverError 36 } DROP TABLE modify_sample; DROP TABLE modify_sample_replicated; DROP TABLE modify_sample_old;