DROP TABLE IF EXISTS t1; CREATE TABLE t1 ( a Float64 STATISTIC(tdigest), b Int64 STATISTIC(tdigest), pk String, ) Engine = MergeTree() ORDER BY pk; -- { serverError INCORRECT_QUERY } SET allow_experimental_statistic = 1; CREATE TABLE t1 ( a Float64 STATISTIC(tdigest), b Int64, pk String STATISTIC(tdigest), ) Engine = MergeTree() ORDER BY pk; -- { serverError ILLEGAL_STATISTIC } CREATE TABLE t1 ( a Float64 STATISTIC(tdigest, tdigest(10)), b Int64, ) Engine = MergeTree() ORDER BY pk; -- { serverError INCORRECT_QUERY } CREATE TABLE t1 ( a Float64 STATISTIC(xyz), b Int64, ) Engine = MergeTree() ORDER BY pk; -- { serverError INCORRECT_QUERY } CREATE TABLE t1 ( a Float64, b Int64, pk String, ) Engine = MergeTree() ORDER BY pk; ALTER TABLE t1 ADD STATISTIC a TYPE xyz; -- { serverError INCORRECT_QUERY } ALTER TABLE t1 ADD STATISTIC a TYPE tdigest; ALTER TABLE t1 ADD STATISTIC a TYPE tdigest; -- { serverError ILLEGAL_STATISTIC } ALTER TABLE t1 ADD STATISTIC pk TYPE tdigest; -- { serverError ILLEGAL_STATISTIC } ALTER TABLE t1 DROP STATISTIC b TYPE tdigest; -- { serverError ILLEGAL_STATISTIC } ALTER TABLE t1 DROP STATISTIC a TYPE tdigest; ALTER TABLE t1 DROP STATISTIC a TYPE tdigest; -- { serverError ILLEGAL_STATISTIC } ALTER TABLE t1 CLEAR STATISTIC a TYPE tdigest; -- { serverError ILLEGAL_STATISTIC } ALTER TABLE t1 MATERIALIZE STATISTIC b TYPE tdigest; -- { serverError ILLEGAL_STATISTIC } ALTER TABLE t1 ADD STATISTIC a TYPE tdigest; ALTER TABLE t1 ADD STATISTIC b TYPE tdigest; ALTER TABLE t1 MODIFY COLUMN a Float64 TTL toDateTime(b) + INTERVAL 1 MONTH; ALTER TABLE t1 MODIFY COLUMN a Int64; -- { serverError ALTER_OF_COLUMN_IS_FORBIDDEN } DROP TABLE t1;