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Comments [#CLICKHOUSE-2765].

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This commit is contained in:
Alexey Milovidov 2017-01-22 16:07:57 +03:00
parent 149d1ead71
commit c7aaef9e13
1 changed files with 6 additions and 5 deletions
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11
libs/libcommon/include/common/DateLUTImpl.h
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@ -14,8 +14,8 @@
#define DATE_LUT_MAX (0x7FFFFFFF - 86400)
#define DATE_LUT_MAX_DAY_NUM (0x7FFFFFFF / 86400)
#define DATE_LUT_MIN_YEAR 1970
#define DATE_LUT_MAX_YEAR 2037 /// Последний полный год
#define DATE_LUT_YEARS 68 /// Количество лет в lookup таблице
#define DATE_LUT_MAX_YEAR 2037 /// Last supported year
#define DATE_LUT_YEARS 68 /// Number of years in lookup table
STRONG_TYPEDEF(UInt16, DayNum_t);
@ -52,15 +52,16 @@ private:
/// Lookup table is indexed by DayNum.
/// Day nums are the same in all time zones. 1970-01-01 is 0 and so on.
/// Table is relatively large (~30 000 elements), so better not to place object on stack.
/// In comparison to std::vector, it is cheaper by one indirection.
/// In comparison to std::vector, plain array is cheaper by one indirection.
Values lut[DATE_LUT_MAX_DAY_NUM + 1];
/// lookup таблица начал годов
/// Year number after DATE_LUT_MIN_YEAR -> day num for start of year.
DayNum_t years_lut[DATE_LUT_YEARS];
/// Смещение от UTC в начале Unix эпохи.
/// UTC offset at beginning of the Unix epoch.
time_t offset_at_start_of_epoch;
/// Time zone name.
std::string time_zone;