DROP TABLE IF EXISTS non_metadata_alters; CREATE TABLE non_metadata_alters ( key UInt64, value1 String, value2 Enum8('Hello' = 1, 'World' = 2), value3 UInt16, value4 DateTime, value5 Date ) ENGINE = MergeTree() ORDER BY tuple(); SET allow_non_metadata_alters = 0; ALTER TABLE non_metadata_alters MODIFY COLUMN value3 UInt64; --{serverError 524} ALTER TABLE non_metadata_alters MODIFY COLUMN value1 UInt32; --{serverError 524} ALTER TABLE non_metadata_alters MODIFY COLUMN value4 Date; --{serverError 524} ALTER TABLE non_metadata_alters DROP COLUMN value4; --{serverError 524} ALTER TABLE non_metadata_alters MODIFY COLUMN value2 Enum8('x' = 5, 'y' = 6); --{serverError 524} ALTER TABLE non_metadata_alters RENAME COLUMN value4 TO renamed_value4; --{serverError 524} ALTER TABLE non_metadata_alters MODIFY COLUMN value3 UInt16 TTL value5 + INTERVAL 5 DAY; --{serverError 524} SET materialize_ttl_after_modify = 0; ALTER TABLE non_metadata_alters MODIFY COLUMN value3 UInt16 TTL value5 + INTERVAL 5 DAY; SHOW CREATE TABLE non_metadata_alters; ALTER TABLE non_metadata_alters MODIFY COLUMN value1 String DEFAULT 'X'; ALTER TABLE non_metadata_alters MODIFY COLUMN value2 Enum8('Hello' = 1, 'World' = 2, '!' = 3); ALTER TABLE non_metadata_alters MODIFY COLUMN value3 Date; ALTER TABLE non_metadata_alters MODIFY COLUMN value4 UInt32; ALTER TABLE non_metadata_alters ADD COLUMN value6 Decimal(3, 3); SHOW CREATE TABLE non_metadata_alters; DROP TABLE IF EXISTS non_metadata_alters;