DROP TABLE IF EXISTS test_alter_on_mutation; CREATE TABLE test_alter_on_mutation ( date Date, key UInt64, value String ) ENGINE ReplicatedMergeTree('/clickhouse/tables/test_01062/alter_on_mutation', '1') ORDER BY key PARTITION BY date; INSERT INTO test_alter_on_mutation select toDate('2020-01-05'), number, toString(number) from system.numbers limit 100; INSERT INTO test_alter_on_mutation select toDate('2020-01-06'), number, toString(number) from system.numbers limit 100; INSERT INTO test_alter_on_mutation select toDate('2020-01-07'), number, toString(number) from system.numbers limit 100; SELECT sum(cast(value as UInt64)) from test_alter_on_mutation; ALTER TABLE test_alter_on_mutation MODIFY COLUMN value UInt64; SELECT sum(value) from test_alter_on_mutation; INSERT INTO test_alter_on_mutation select toDate('2020-01-05'), number, toString(number) from system.numbers limit 100, 100; INSERT INTO test_alter_on_mutation select toDate('2020-01-06'), number, toString(number) from system.numbers limit 100, 100; INSERT INTO test_alter_on_mutation select toDate('2020-01-07'), number, toString(number) from system.numbers limit 100, 100; OPTIMIZE TABLE test_alter_on_mutation FINAL; SELECT sum(value) from test_alter_on_mutation; ALTER TABLE test_alter_on_mutation MODIFY COLUMN value String; SELECT sum(cast(value as UInt64)) from test_alter_on_mutation; OPTIMIZE TABLE test_alter_on_mutation FINAL; SELECT sum(cast(value as UInt64)) from test_alter_on_mutation; ALTER TABLE test_alter_on_mutation ADD COLUMN value1 Float64; SELECT sum(value1) from test_alter_on_mutation; ALTER TABLE test_alter_on_mutation DROP COLUMN value; SELECT sum(value) from test_alter_on_mutation; -- {serverError 47} ALTER TABLE test_alter_on_mutation ADD COLUMN value String DEFAULT '10'; SELECT sum(cast(value as UInt64)) from test_alter_on_mutation; -- TODO(alesap) OPTIMIZE table test_alter_on_mutation FINAL; ALTER TABLE test_alter_on_mutation MODIFY COLUMN value UInt64 DEFAULT 10; SELECT sum(value) from test_alter_on_mutation; DROP TABLE IF EXISTS test_alter_on_mutation; DROP TABLE IF EXISTS nested_alter; CREATE TABLE nested_alter (`d` Date, `k` UInt64, `i32` Int32, `dt` DateTime, `n.ui8` Array(UInt8), `n.s` Array(String), `n.d` Array(Date), `s` String DEFAULT '0') ENGINE = ReplicatedMergeTree('/clickhouse/tables/test_01062/nested_alter', 'r2', d, k, 8192); INSERT INTO nested_alter VALUES ('2015-01-01', 6,38,'2014-07-15 13:26:50',[10,20,30],['asd','qwe','qwe'],['2000-01-01','2000-01-01','2000-01-03'],'100500'); SELECT * FROM nested_alter; ALTER TABLE nested_alter DROP COLUMN `n.d`; SELECT * FROM nested_alter; DROP TABLE nested_alter;