DROP TABLE IF EXISTS test1; DROP TABLE IF EXISTS test2; CREATE TABLE test1 (s String) ENGINE = MergeTree ORDER BY s SETTINGS index_granularity = 1; CREATE TABLE test2 (s LowCardinality(String)) ENGINE = MergeTree ORDER BY s SETTINGS index_granularity = 1; INSERT INTO test1 SELECT toString(number) FROM numbers(10000); INSERT INTO test2 SELECT toString(number) FROM numbers(10000); SELECT s FROM test1 WHERE toString(s) = '1234' SETTINGS max_rows_to_read = 2; SELECT s FROM test2 WHERE toString(s) = '1234' SETTINGS max_rows_to_read = 2; DROP TABLE test1; DROP TABLE test2;