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ClickHouse/tests/queries/0_stateless/01252_weird_time_zone.sql

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Extended range of DateTime64 to years 1925 - 2238 The Year 1925 is a starting point because most of the timezones switched to saner (mostly 15-minutes based) offsets somewhere during 1924 or before. And that significantly simplifies implementation. 2238 is to simplify arithmetics for sanitizing LUT index access; there are less than 0x1ffff days from 1925. * Extended DateLUTImpl internal LUT to 0x1ffff items, some of which represent negative (pre-1970) time values. As a collateral benefit, Date now correctly supports dates up to 2149 (instead of 2106). * Added a new strong typedef ExtendedDayNum, which represents dates pre-1970 and post 2149. * Functions that used to return DayNum now return ExtendedDayNum. * Refactored DateLUTImpl to untie DayNum from the dual role of being a value and an index (due to negative time). Index is now a different type LUTIndex with explicit conversion functions from DatNum, time_t, and ExtendedDayNum. * Updated DateLUTImpl to properly support values close to epoch start (1970-01-01 00:00), including negative ones. * Reduced resolution of DateLUTImpl::Values::time_at_offset_change to multiple of 15-minutes to allow storing 64-bits of time_t in DateLUTImpl::Value while keeping same size. * Minor performance updates to DateLUTImpl when building month LUT by skipping non-start-of-month days. * Fixed extractTimeZoneFromFunctionArguments to work correctly with DateTime64. * New unit-tests and stateless integration tests for both DateTime and DateTime64.
2020-04-17 13:26:44 +00:00
SELECT 'Pacific/Kiritimati', toDateTime('2020-01-02 03:04:05', 'Pacific/Kiritimati') AS x, toStartOfDay(x), toHour(x);
SELECT 'Africa/El_Aaiun', toDateTime('2020-01-02 03:04:05', 'Africa/El_Aaiun') AS x, toStartOfDay(x), toHour(x);
SELECT 'Asia/Pyongyang', toDateTime('2020-01-02 03:04:05', 'Asia/Pyongyang') AS x, toStartOfDay(x), toHour(x);
SELECT 'Pacific/Kwajalein', toDateTime('2020-01-02 03:04:05', 'Pacific/Kwajalein') AS x, toStartOfDay(x), toHour(x);
SELECT 'Pacific/Apia', toDateTime('2020-01-02 03:04:05', 'Pacific/Apia') AS x, toStartOfDay(x), toHour(x);
SELECT 'Pacific/Enderbury', toDateTime('2020-01-02 03:04:05', 'Pacific/Enderbury') AS x, toStartOfDay(x), toHour(x);
SELECT 'Pacific/Fakaofo', toDateTime('2020-01-02 03:04:05', 'Pacific/Fakaofo') AS x, toStartOfDay(x), toHour(x);
More tests
2020-04-20 07:23:17 +00:00
Extended range of DateTime64 to years 1925 - 2238 The Year 1925 is a starting point because most of the timezones switched to saner (mostly 15-minutes based) offsets somewhere during 1924 or before. And that significantly simplifies implementation. 2238 is to simplify arithmetics for sanitizing LUT index access; there are less than 0x1ffff days from 1925. * Extended DateLUTImpl internal LUT to 0x1ffff items, some of which represent negative (pre-1970) time values. As a collateral benefit, Date now correctly supports dates up to 2149 (instead of 2106). * Added a new strong typedef ExtendedDayNum, which represents dates pre-1970 and post 2149. * Functions that used to return DayNum now return ExtendedDayNum. * Refactored DateLUTImpl to untie DayNum from the dual role of being a value and an index (due to negative time). Index is now a different type LUTIndex with explicit conversion functions from DatNum, time_t, and ExtendedDayNum. * Updated DateLUTImpl to properly support values close to epoch start (1970-01-01 00:00), including negative ones. * Reduced resolution of DateLUTImpl::Values::time_at_offset_change to multiple of 15-minutes to allow storing 64-bits of time_t in DateLUTImpl::Value while keeping same size. * Minor performance updates to DateLUTImpl when building month LUT by skipping non-start-of-month days. * Fixed extractTimeZoneFromFunctionArguments to work correctly with DateTime64. * New unit-tests and stateless integration tests for both DateTime and DateTime64.
2020-04-17 13:26:44 +00:00
SELECT 'Pacific/Kiritimati', rand() as r, toHour(toDateTime(r, 'Pacific/Kiritimati') AS t) AS h, t, toTypeName(t) FROM numbers(1000000) WHERE h < 0 OR h > 23 ORDER BY h LIMIT 1 BY h;
SELECT 'Africa/El_Aaiun', rand() as r, toHour(toDateTime(r, 'Africa/El_Aaiun') AS t) AS h, t, toTypeName(t) FROM numbers(1000000) WHERE h < 0 OR h > 23 ORDER BY h LIMIT 1 BY h;
SELECT 'Asia/Pyongyang', rand() as r, toHour(toDateTime(r, 'Asia/Pyongyang') AS t) AS h, t, toTypeName(t) FROM numbers(1000000) WHERE h < 0 OR h > 23 ORDER BY h LIMIT 1 BY h;
SELECT 'Pacific/Kwajalein', rand() as r, toHour(toDateTime(r, 'Pacific/Kwajalein') AS t) AS h, t, toTypeName(t) FROM numbers(1000000) WHERE h < 0 OR h > 23 ORDER BY h LIMIT 1 BY h;
SELECT 'Pacific/Apia', rand() as r, toHour(toDateTime(r, 'Pacific/Apia') AS t) AS h, t, toTypeName(t) FROM numbers(1000000) WHERE h < 0 OR h > 23 ORDER BY h LIMIT 1 BY h;
SELECT 'Pacific/Enderbury', rand() as r, toHour(toDateTime(r, 'Pacific/Enderbury') AS t) AS h, t, toTypeName(t) FROM numbers(1000000) WHERE h < 0 OR h > 23 ORDER BY h LIMIT 1 BY h;
SELECT 'Pacific/Fakaofo', rand() as r, toHour(toDateTime(r, 'Pacific/Fakaofo') AS t) AS h, t, toTypeName(t) FROM numbers(1000000) WHERE h < 0 OR h > 23 ORDER BY h LIMIT 1 BY h;
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