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This patch makes it possible to use the full set of timezones when doing

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"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
This commit is contained in:
Bruce Momjian
2005-06-15 00:34:11 +00:00
parent 5955945828
commit 0851a6fbc7
9 changed files with 145 additions and 129 deletions
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4
src/include/utils/timestamp.h
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.44 2005/06/14 21:04:42 momjian Exp $
* $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.45 2005/06/15 00:34:10 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -264,7 +264,7 @@ extern TimestampTz StartTime;
extern int tm2timestamp(struct pg_tm * tm, fsec_t fsec, int *tzp, Timestamp *dt);
extern int timestamp2tm(Timestamp dt, int *tzp, struct pg_tm * tm,
fsec_t *fsec, char **tzn);
fsec_t *fsec, char **tzn, pg_tz *attimezone);
extern void dt2time(Timestamp dt, int *hour, int *min, int *sec, fsec_t *fsec);
extern int interval2tm(Interval span, struct pg_tm * tm, fsec_t *fsec);