mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-14 02:12:21 +00:00
57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
|
#include <stddef.h>
|
||
|
|
|
||
|
|
|
||
|
|
class DateLUTImpl;
|
||
|
|
|
||
|
|
namespace DB
|
||
|
|
{
|
||
|
|
|
||
|
|
class ReadBuffer;
|
||
|
|
|
||
|
|
/** This function will use the following assumptions:
|
||
|
|
*
|
||
|
|
* NNNNNNNNNN - 9..10 digits is a unix timestamp
|
||
|
|
*
|
||
|
|
* YYYYMMDDhhmmss - 14 numbers is always interpreted this way
|
||
|
|
*
|
||
|
|
* YYYYMMDD - 8 digits in a row
|
||
|
|
* YYYY*MM*DD - or with any delimiters after first 4-digit year component
|
||
|
|
*
|
||
|
|
* DD/MM/YY
|
||
|
|
* DD/MM/YYYY - when '/' separator is used, these are the only possible forms
|
||
|
|
* Note that American style is not supported.
|
||
|
|
*
|
||
|
|
* hh:mm:ss - when ':' separator is used, it is always time
|
||
|
|
* hh:mm - it can be specified without seconds
|
||
|
|
*
|
||
|
|
* YYYY - 4 digits is always year
|
||
|
|
*
|
||
|
|
* YYYYMM - 6 digits is a year, month if year was not already read
|
||
|
|
* hhmmss - 6 digits is a time if year was already read
|
||
|
|
*
|
||
|
|
* .nnnnnnn - any number of digits after point is fractional part of second.
|
||
|
|
*
|
||
|
|
* T - means that time will follow
|
||
|
|
*
|
||
|
|
* Z - means zero UTC offset
|
||
|
|
*
|
||
|
|
* +hhmm
|
||
|
|
* +hh:mm
|
||
|
|
* +hh
|
||
|
|
* -... - time zone offset
|
||
|
|
*
|
||
|
|
* single whitespace can be used as a separator
|
||
|
|
*
|
||
|
|
* AM/PM
|
||
|
|
*
|
||
|
|
* Jan/Feb/Mar/Apr/May/Jun/Jul/Aug/Sep/Oct/Nov/Dec
|
||
|
|
* Mon/Tue/Wed/Thu/Fri/Sat/Sun
|
||
|
|
*
|
||
|
|
* AD/BC - not used
|
||
|
|
*/
|
||
|
|
|
||
|
|
void parseDateTimeBestEffort(time_t & res, ReadBuffer & in, const DateLUTImpl & local_time_zone, const DateLUTImpl & utc_time_zone);
|
||
|
|
bool tryParseDateTimeBestEffort(time_t & res, ReadBuffer & in, const DateLUTImpl & local_time_zone, const DateLUTImpl & utc_time_zone);
|
||
|
|
|
||
|
|
}
|