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0851a6fbc7
"AT TIME ZONE", and not just the shorlist previously available. For example: SELECT CURRENT_TIMESTAMP AT TIME ZONE 'Europe/London'; works fine now. It will also obey whatever DST rules were in effect at just that date, which the previous implementation did not. It also supports the AT TIME ZONE on the timetz datatype. The whole handling of DST is a bit bogus there, so I chose to make it use whatever DST rules are in effect at the time of executig the query. not sure if anybody is actuallyi *using* timetz though, it seems pretty unpredictable just because of this... Magnus Hagander
65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/*-------------------------------------------------------------------------
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*
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* pgtime.h
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* PostgreSQL internal timezone library
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*
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* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/include/pgtime.h,v 1.8 2005/06/15 00:34:09 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef _PGTIME_H
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#define _PGTIME_H
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/*
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* The API of this library is generally similar to the corresponding
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* C library functions, except that we use pg_time_t which (we hope) is
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* 64 bits wide, and which is most definitely signed not unsigned.
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*/
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typedef int64 pg_time_t;
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struct pg_tm
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{
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int tm_sec;
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int tm_min;
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int tm_hour;
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int tm_mday;
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int tm_mon; /* origin 0, not 1 */
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int tm_year; /* relative to 1900 */
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int tm_wday;
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int tm_yday;
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int tm_isdst;
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long int tm_gmtoff;
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const char *tm_zone;
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};
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typedef struct pg_tz pg_tz;
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extern struct pg_tm *pg_localtime(const pg_time_t *timep, const pg_tz *tz);
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extern struct pg_tm *pg_gmtime(const pg_time_t *timep);
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extern int pg_next_dst_boundary(const pg_time_t *timep,
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long int *before_gmtoff,
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int *before_isdst,
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pg_time_t *boundary,
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long int *after_gmtoff,
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int *after_isdst,
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const pg_tz *tz);
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extern size_t pg_strftime(char *s, size_t max, const char *format,
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const struct pg_tm * tm);
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extern void pg_timezone_initialize(void);
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extern pg_tz *pg_tzset(const char *tzname);
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extern bool tz_acceptable(pg_tz *tz);
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extern const char *pg_get_timezone_name(pg_tz *tz);
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extern pg_tz *global_timezone;
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/* Maximum length of a timezone name */
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#define TZ_STRLEN_MAX 255
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#endif /* _PGTIME_H */
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