-- { echo }
SELECT toString(toDateTime('-922337203.6854775808', 1));
1940-10-09 22:13:17.6
SELECT toString(toDateTime('9922337203.6854775808', 1));
2283-11-11 23:46:43.6
SELECT toDateTime64(CAST('10000000000.1' AS Decimal64(1)), 1);
2283-11-11 23:46:40.1
SELECT toDateTime64(CAST('-10000000000.1' AS Decimal64(1)), 1);
1925-01-01 23:09:20.1