DROP TABLE IF EXISTS t1;
DROP TABLE IF EXISTS t2;

CREATE TABLE t1 (str String, dec Decimal64(8)) ENGINE = MergeTree ORDER BY str;
CREATE TABLE t2 (str String, dec Decimal64(8)) ENGINE = MergeTree ORDER BY dec;

INSERT INTO t1 SELECT toString(number), toDecimal64(number, 8) FROM system.numbers LIMIT 1000000;
SELECT count() FROM t1;

INSERT INTO t2 SELECT toString(number), toDecimal64(number, 8) FROM system.numbers LIMIT 1000000;
SELECT count() FROM t2;

DROP TABLE t1;
DROP TABLE t2;