mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-30 11:32:03 +00:00
40 lines
1.3 KiB
SQL
40 lines
1.3 KiB
SQL
-- Before UNIX epoch
|
|
WITH
|
|
toDateTime64('1959-09-16 19:20:12.999999998', 9, 'UTC') AS dt1,
|
|
toDateTime64('1959-09-16 19:20:12.999999999', 9, 'UTC') AS dt2
|
|
SELECT
|
|
dt1 < dt2,
|
|
(dt1 + INTERVAL 1 NANOSECOND) = dt2,
|
|
(dt1 + INTERVAL 2 NANOSECOND) > dt2,
|
|
(dt1 + INTERVAL 3 NANOSECOND) > dt2;
|
|
|
|
-- At UNIX epoch border
|
|
WITH
|
|
toDateTime64('1969-12-31 23:59:59.999999998', 9, 'UTC') AS dt1,
|
|
toDateTime64('1969-12-31 23:59:59.999999999', 9, 'UTC') AS dt2
|
|
SELECT
|
|
dt1 < dt2,
|
|
(dt1 + INTERVAL 1 NANOSECOND) = dt2,
|
|
(dt1 + INTERVAL 2 NANOSECOND) > dt2,
|
|
(dt1 + INTERVAL 3 NANOSECOND) > dt2;
|
|
|
|
-- After UNIX epoch
|
|
WITH
|
|
toDateTime64('2001-12-31 23:59:59.999999998', 9, 'UTC') AS dt1,
|
|
toDateTime64('2001-12-31 23:59:59.999999999', 9, 'UTC') AS dt2
|
|
SELECT
|
|
dt1 < dt2,
|
|
(dt1 + INTERVAL 1 NANOSECOND) = dt2,
|
|
(dt1 + INTERVAL 2 NANOSECOND) > dt2,
|
|
(dt1 + INTERVAL 3 NANOSECOND) > dt2;
|
|
|
|
-- At upper DT64 bound (DT64 precision is lower here by design)
|
|
WITH
|
|
toDateTime64('2282-12-31 23:59:59.999998', 6, 'UTC') AS dt1,
|
|
toDateTime64('2282-12-31 23:59:59.999999', 6, 'UTC') AS dt2
|
|
SELECT
|
|
dt1 < dt2,
|
|
(dt1 + INTERVAL 1 MICROSECOND) = dt2,
|
|
(dt1 + INTERVAL 2 MICROSECOND) > dt2,
|
|
(dt1 + INTERVAL 3 MICROSECOND) > dt2;
|