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Merge pull request #10369 from ClickHouse/fix-weird-timezones

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Fix for weird timezones
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alexey-milovidov 2020-04-20 23:21:52 +03:00 committed by GitHub
commit fea7ee800a
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3 changed files with 24 additions and 2 deletions
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4
base/common/DateLUTImpl.h
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@ -99,7 +99,7 @@ private:
return guess;
/// Time zones that have offset 0 from UTC do daylight saving time change (if any) towards increasing UTC offset (example: British Standard Time).
if (offset_at_start_of_epoch >= 0)
if (t >= lut[DayNum(guess + 1)].date)
return DayNum(guess + 1);
return DayNum(guess - 1);
@ -579,7 +579,7 @@ public:
return t / 3600;
/// Assume that if offset was fractional, then the fraction is the same as at the beginning of epoch.
/// NOTE This assumption is false for "Pacific/Pitcairn" time zone.
/// NOTE This assumption is false for "Pacific/Pitcairn" and "Pacific/Kiritimati" time zones.
return (t + 86400 - offset_at_start_of_epoch) / 3600;
}

7
tests/queries/0_stateless/01252_weird_time_zone.reference Normal file
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@ -0,0 +1,7 @@
2020-01-02 03:04:05 2020-01-02 00:00:00 3
2020-01-02 03:04:05 2020-01-02 00:00:00 3
2020-01-02 03:04:05 2020-01-02 00:00:00 3
2020-01-02 03:04:05 2020-01-02 00:00:00 3
2020-01-02 03:04:05 2020-01-02 00:00:00 3
2020-01-02 03:04:05 2020-01-02 00:00:00 3
2020-01-02 03:04:05 2020-01-02 00:00:00 3

15
tests/queries/0_stateless/01252_weird_time_zone.sql Normal file
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@ -0,0 +1,15 @@
SELECT toDateTime('2020-01-02 03:04:05', 'Pacific/Kiritimati') AS x, toStartOfDay(x), toHour(x);
SELECT toDateTime('2020-01-02 03:04:05', 'Africa/El_Aaiun') AS x, toStartOfDay(x), toHour(x);
SELECT toDateTime('2020-01-02 03:04:05', 'Asia/Pyongyang') AS x, toStartOfDay(x), toHour(x);
SELECT toDateTime('2020-01-02 03:04:05', 'Pacific/Kwajalein') AS x, toStartOfDay(x), toHour(x);
SELECT toDateTime('2020-01-02 03:04:05', 'Pacific/Apia') AS x, toStartOfDay(x), toHour(x);
SELECT toDateTime('2020-01-02 03:04:05', 'Pacific/Enderbury') AS x, toStartOfDay(x), toHour(x);
SELECT toDateTime('2020-01-02 03:04:05', 'Pacific/Fakaofo') AS x, toStartOfDay(x), toHour(x);
SELECT toHour(toDateTime(rand(), 'Pacific/Kiritimati') AS t) AS h, t FROM numbers(1000000) WHERE h < 0 OR h > 23 ORDER BY h LIMIT 1 BY h;
SELECT toHour(toDateTime(rand(), 'Africa/El_Aaiun') AS t) AS h, t FROM numbers(1000000) WHERE h < 0 OR h > 23 ORDER BY h LIMIT 1 BY h;
SELECT toHour(toDateTime(rand(), 'Asia/Pyongyang') AS t) AS h, t FROM numbers(1000000) WHERE h < 0 OR h > 23 ORDER BY h LIMIT 1 BY h;
SELECT toHour(toDateTime(rand(), 'Pacific/Kwajalein') AS t) AS h, t FROM numbers(1000000) WHERE h < 0 OR h > 23 ORDER BY h LIMIT 1 BY h;
SELECT toHour(toDateTime(rand(), 'Pacific/Apia') AS t) AS h, t FROM numbers(1000000) WHERE h < 0 OR h > 23 ORDER BY h LIMIT 1 BY h;
SELECT toHour(toDateTime(rand(), 'Pacific/Enderbury') AS t) AS h, t FROM numbers(1000000) WHERE h < 0 OR h > 23 ORDER BY h LIMIT 1 BY h;
SELECT toHour(toDateTime(rand(), 'Pacific/Fakaofo') AS t) AS h, t FROM numbers(1000000) WHERE h < 0 OR h > 23 ORDER BY h LIMIT 1 BY h;