DROP TABLE IF EXISTS t_collisions; SELECT lower(hex(reverse(CAST(sipHash128('very_very_long_column_name_that_will_be_replaced_with_hash'), 'FixedString(16)')))); CREATE TABLE t_collisions ( `very_very_long_column_name_that_will_be_replaced_with_hash` Int32, `e798545eefc8b7a1c2c81ff00c064ad8` Int32 ) ENGINE = MergeTree ORDER BY tuple() SETTINGS replace_long_file_name_to_hash = 1, max_file_name_length = 42; -- { serverError BAD_ARGUMENTS } DROP TABLE IF EXISTS t_collisions; CREATE TABLE t_collisions ( `col1` Int32, `e798545eefc8b7a1c2c81ff00c064ad8` Int32 ) ENGINE = MergeTree ORDER BY tuple() SETTINGS replace_long_file_name_to_hash = 1, max_file_name_length = 42; ALTER TABLE t_collisions ADD COLUMN very_very_long_column_name_that_will_be_replaced_with_hash Int32; -- { serverError BAD_ARGUMENTS } ALTER TABLE t_collisions RENAME COLUMN col1 TO very_very_long_column_name_that_will_be_replaced_with_hash; -- { serverError BAD_ARGUMENTS } DROP TABLE IF EXISTS t_collisions; CREATE TABLE t_collisions ( `very_very_long_column_name_that_will_be_replaced_with_hash` Int32, `e798545eefc8b7a1c2c81ff00c064ad8` Int32 ) ENGINE = MergeTree ORDER BY tuple() SETTINGS replace_long_file_name_to_hash = 0; INSERT INTO t_collisions VALUES (1, 1); ALTER TABLE t_collisions MODIFY SETTING replace_long_file_name_to_hash = 1, max_file_name_length = 42; -- { serverError BAD_ARGUMENTS } INSERT INTO t_collisions VALUES (2, 2); SELECT * FROM t_collisions ORDER BY e798545eefc8b7a1c2c81ff00c064ad8; DROP TABLE IF EXISTS t_collisions; CREATE TABLE t_collisions ( `id` Int, `col` Array(String), `col.s` Array(LowCardinality(String)), `col.u` Array(LowCardinality(String)) ) ENGINE = MergeTree ORDER BY id; -- { serverError BAD_ARGUMENTS } DROP TABLE IF EXISTS t_collisions; CREATE TABLE t_collisions ( `id` Int, `col` String, `col.s` Array(LowCardinality(String)), `col.u` Array(LowCardinality(String)) ) ENGINE = MergeTree ORDER BY id; ALTER TABLE t_collisions MODIFY COLUMN col Array(String); -- { serverError BAD_ARGUMENTS } DROP TABLE IF EXISTS t_collisions;