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

Browse Source 
"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
REL8_1_STABLE
Bruce Momjian 21 years ago
parent 5955945828
commit 0851a6fbc7
9 changed files with 142 additions and 126 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 8
      doc/src/sgml/datetime.sgml
  2. 7
      doc/src/sgml/func.sgml
  3. 88
      src/backend/utils/adt/date.c
  4. 6
      src/backend/utils/adt/formatting.c
  5. 6
      src/backend/utils/adt/nabstime.c
  6. 139
      src/backend/utils/adt/timestamp.c
  7. 6
      src/include/pgtime.h
  8. 4
      src/include/utils/timestamp.h
  9. 4
      src/timezone/pgtz.h

8
doc/src/sgml/datetime.sgml
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@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/datetime.sgml,v 2.45 2005/01/09 18:58:10 tgl Exp $
$PostgreSQL: pgsql/doc/src/sgml/datetime.sgml,v 2.46 2005/06/15 00:34:08 momjian Exp $
-->
<appendix id="datetime-appendix">
@ -990,7 +990,9 @@ $PostgreSQL: pgsql/doc/src/sgml/datetime.sgml,v 2.45 2005/01/09 18:58:10 tgl Exp
<para>
<xref linkend="datetime-timezone-set-table"> shows the time zone
names recognized by <productname>PostgreSQL</productname> as valid
settings for the <xref linkend="guc-timezone"> parameter. Note that
settings for the <xref linkend="guc-timezone"> parameter, and as
parameters to the <literal>AT TIME ZONE function</> (see
<xref linkend="functions-datetime-zoneconvert">). Note that
these names are conceptually as well as practically different from
the names shown in <xref linkend="datetime-timezone-input-table">:
most of these names imply a local daylight-savings time rule, whereas
@ -1004,7 +1006,7 @@ $PostgreSQL: pgsql/doc/src/sgml/datetime.sgml,v 2.45 2005/01/09 18:58:10 tgl Exp
</para>
<table id="datetime-timezone-set-table">
<title>Time Zone Names for Setting <varname>timezone</></title>
<title>Time Zone Names for Setting <varname>timezone</> and <literal>AT TIME ZONE</></title>
<tgroup cols="1">
<thead>
<row>

7
doc/src/sgml/func.sgml
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@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.256 2005/06/14 23:47:39 momjian Exp $
$PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.257 2005/06/15 00:34:08 momjian Exp $
PostgreSQL documentation
-->
@ -5679,10 +5679,7 @@ SELECT date_trunc('year', TIMESTAMP '2001-02-16 20:38:40');
specified either as a text string (e.g., <literal>'PST'</literal>)
or as an interval (e.g., <literal>INTERVAL '-08:00'</literal>).
In the text case, the available zone names are those shown in
<xref linkend="datetime-timezone-input-table">. (It would be useful
to support the more general names shown in
<xref linkend="datetime-timezone-set-table">, but this is not yet
implemented.)
<xref linkend="datetime-timezone-set-table">.
</para>
<para>

88
src/backend/utils/adt/date.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/date.c,v 1.109 2005/05/26 02:04:13 neilc Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/date.c,v 1.110 2005/06/15 00:34:08 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -18,6 +18,7 @@
#include <ctype.h>
#include <limits.h>
#include <float.h>
#include <time.h>
#include "access/hash.h"
#include "libpq/pqformat.h"
@ -724,7 +725,7 @@ timestamp_date(PG_FUNCTION_ARGS)
if (TIMESTAMP_NOT_FINITE(timestamp))
PG_RETURN_NULL();
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL) !=0)
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -767,7 +768,7 @@ timestamptz_date(PG_FUNCTION_ARGS)
if (TIMESTAMP_NOT_FINITE(timestamp))
PG_RETURN_NULL();
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn) !=0)
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -1327,7 +1328,7 @@ timestamp_time(PG_FUNCTION_ARGS)
if (TIMESTAMP_NOT_FINITE(timestamp))
PG_RETURN_NULL();
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL) !=0)
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -1364,7 +1365,7 @@ timestamptz_time(PG_FUNCTION_ARGS)
if (TIMESTAMP_NOT_FINITE(timestamp))
PG_RETURN_NULL();
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn) !=0)
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -2247,7 +2248,7 @@ timestamptz_timetz(PG_FUNCTION_ARGS)
if (TIMESTAMP_NOT_FINITE(timestamp))
PG_RETURN_NULL();
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn) !=0)
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -2463,53 +2464,60 @@ timetz_part(PG_FUNCTION_ARGS)
/* timetz_zone()
* Encode time with time zone type with specified time zone.
* Applies DST rules as of the current date.
*/
Datum
timetz_zone(PG_FUNCTION_ARGS)
{
text *zone = PG_GETARG_TEXT_P(0);
TimeTzADT *time = PG_GETARG_TIMETZADT_P(1);
TimeTzADT *t = PG_GETARG_TIMETZADT_P(1);
TimeTzADT *result;
int tz;
int type,
val;
char *lowzone;
lowzone = downcase_truncate_identifier(VARDATA(zone),
VARSIZE(zone) - VARHDRSZ,
false);
type = DecodeSpecial(0, lowzone, &val);
char tzname[TZ_STRLEN_MAX];
int len;
pg_tz *tzp;
struct pg_tm *tm;
pg_time_t now;
/* Find the specified timezone */
len = (VARSIZE(zone)-VARHDRSZ>TZ_STRLEN_MAX)?TZ_STRLEN_MAX:(VARSIZE(zone)-VARHDRSZ);
memcpy(tzname,VARDATA(zone),len);
tzname[len]=0;
tzp = pg_tzset(tzname);
if (!tzp) {
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("time zone \"%s\" not recognized", tzname)));
PG_RETURN_NULL();
}
result = (TimeTzADT *) palloc(sizeof(TimeTzADT));
/* Get the offset-from-GMT that is valid today for the selected zone */
if ((now = time(NULL)) < 0 ||
(tm = pg_localtime(&now, tzp)) == NULL) {
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("could not determine current time")));
PG_RETURN_NULL();
}
if (type == TZ || type == DTZ)
{
tz = val * 60;
result = (TimeTzADT *)palloc(sizeof(TimeTzADT));
tz = -tm->tm_gmtoff;
#ifdef HAVE_INT64_TIMESTAMP
result->time = time->time + (time->zone - tz) * USECS_PER_SEC;
while (result->time < INT64CONST(0))
result->time += USECS_PER_DAY;
while (result->time >= USECS_PER_DAY)
result->time -= USECS_PER_DAY;
result->time = t->time + (t->zone - tz) * USECS_PER_SEC;
while (result->time < INT64CONST(0))
result->time += USECS_PER_DAY;
while (result->time >= USECS_PER_DAY)
result->time -= USECS_PER_DAY;
#else
result->time = time->time + (time->zone - tz);
while (result->time < 0)
result->time += SECS_PER_DAY;
while (result->time >= SECS_PER_DAY)
result->time -= SECS_PER_DAY;
result->time = t->time + (t->zone - tz);
while (result->time < 0)
result->time += SECS_PER_DAY;
while (result->time >= SECS_PER_DAY)
result->time -= SECS_PER_DAY;
#endif
result->zone = tz;
}
else
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("time zone \"%s\" not recognized", lowzone)));
PG_RETURN_NULL();
}
result->zone = tz;
PG_RETURN_TIMETZADT_P(result);
} /* timetz_zone() */

6
src/backend/utils/adt/formatting.c
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@ -1,7 +1,7 @@
/* -----------------------------------------------------------------------
* formatting.c
*
* $PostgreSQL: pgsql/src/backend/utils/adt/formatting.c,v 1.87 2005/05/25 21:40:40 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/formatting.c,v 1.88 2005/06/15 00:34:08 momjian Exp $
*
*
* Portions Copyright (c) 1999-2005, PostgreSQL Global Development Group
@ -2910,7 +2910,7 @@ timestamp_to_char(PG_FUNCTION_ARGS)
ZERO_tmtc(&tmtc);
if (timestamp2tm(dt, NULL, tmtcTm(&tmtc), &tmtcFsec(&tmtc), NULL) != 0)
if (timestamp2tm(dt, NULL, tmtcTm(&tmtc), &tmtcFsec(&tmtc), NULL, NULL) != 0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -2935,7 +2935,7 @@ timestamptz_to_char(PG_FUNCTION_ARGS)
ZERO_tmtc(&tmtc);
if (timestamp2tm(dt, &tz, tmtcTm(&tmtc), &tmtcFsec(&tmtc), &tmtcTzn(&tmtc)) != 0)
if (timestamp2tm(dt, &tz, tmtcTm(&tmtc), &tmtcFsec(&tmtc), &tmtcTzn(&tmtc), NULL) != 0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));

6
src/backend/utils/adt/nabstime.c
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@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/nabstime.c,v 1.132 2005/05/26 02:04:13 neilc Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/nabstime.c,v 1.133 2005/06/15 00:34:08 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -556,7 +556,7 @@ timestamp_abstime(PG_FUNCTION_ARGS)
result = NOSTART_ABSTIME;
else if (TIMESTAMP_IS_NOEND(timestamp))
result = NOEND_ABSTIME;
else if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL) == 0)
else if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) == 0)
{
tz = DetermineLocalTimeZone(tm);
result = tm2abstime(tm, tz);
@ -632,7 +632,7 @@ timestamptz_abstime(PG_FUNCTION_ARGS)
result = NOSTART_ABSTIME;
else if (TIMESTAMP_IS_NOEND(timestamp))
result = NOEND_ABSTIME;
else if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL) == 0)
else if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) == 0)
result = tm2abstime(tm, 0);
else
{

139
src/backend/utils/adt/timestamp.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.125 2005/06/14 21:04:40 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.126 2005/06/15 00:34:09 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -142,7 +142,7 @@ timestamp_out(PG_FUNCTION_ARGS)
if (TIMESTAMP_NOT_FINITE(timestamp))
EncodeSpecialTimestamp(timestamp, buf);
else if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL) == 0)
else if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) == 0)
EncodeDateTime(tm, fsec, NULL, &tzn, DateStyle, buf);
else
ereport(ERROR,
@ -178,7 +178,7 @@ timestamp_recv(PG_FUNCTION_ARGS)
/* rangecheck: see if timestamp_out would like it */
if (TIMESTAMP_NOT_FINITE(timestamp))
/* ok */ ;
else if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL) !=0)
else if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -381,7 +381,7 @@ timestamptz_out(PG_FUNCTION_ARGS)
if (TIMESTAMP_NOT_FINITE(dt))
EncodeSpecialTimestamp(dt, buf);
else if (timestamp2tm(dt, &tz, tm, &fsec, &tzn) == 0)
else if (timestamp2tm(dt, &tz, tm, &fsec, &tzn, NULL) == 0)
EncodeDateTime(tm, fsec, &tz, &tzn, DateStyle, buf);
else
ereport(ERROR,
@ -419,7 +419,7 @@ timestamptz_recv(PG_FUNCTION_ARGS)
/* rangecheck: see if timestamptz_out would like it */
if (TIMESTAMP_NOT_FINITE(timestamp))
/* ok */ ;
else if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn) !=0)
else if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -984,9 +984,12 @@ dt2time(Timestamp jd, int *hour, int *min, int *sec, fsec_t *fsec)
* Returns:
* 0 on success
* -1 on out of range
*
* If attimezone is NULL, the global timezone (including possblly brute forced
* timezone) will be used.
*/
int
timestamp2tm(Timestamp dt, int *tzp, struct pg_tm * tm, fsec_t *fsec, char **tzn)
timestamp2tm(Timestamp dt, int *tzp, struct pg_tm * tm, fsec_t *fsec, char **tzn, pg_tz *attimezone)
{
Timestamp date;
Timestamp time;
@ -997,7 +1000,7 @@ timestamp2tm(Timestamp dt, int *tzp, struct pg_tm * tm, fsec_t *fsec, char **tzn
* specified. Go ahead and rotate to the local time zone since we will
* later bypass any calls which adjust the tm fields.
*/
if (HasCTZSet && (tzp != NULL))
if ((attimezone==NULL) && HasCTZSet && (tzp != NULL))
{
#ifdef HAVE_INT64_TIMESTAMP
dt -= CTimeZone * USECS_PER_SEC;
@ -1050,7 +1053,7 @@ timestamp2tm(Timestamp dt, int *tzp, struct pg_tm * tm, fsec_t *fsec, char **tzn
* We have a brute force time zone per SQL99? Then use it without
* change since we have already rotated to the time zone.
*/
if (HasCTZSet)
if ((attimezone==NULL) && HasCTZSet)
{
*tzp = CTimeZone;
tm->tm_isdst = 0;
@ -1081,7 +1084,7 @@ timestamp2tm(Timestamp dt, int *tzp, struct pg_tm * tm, fsec_t *fsec, char **tzn
utime = (pg_time_t) dt;
if ((Timestamp) utime == dt)
{
struct pg_tm *tx = pg_localtime(&utime, global_timezone);
struct pg_tm *tx = pg_localtime(&utime, (attimezone!=NULL)?attimezone:global_timezone);
tm->tm_year = tx->tm_year + 1900;
tm->tm_mon = tx->tm_mon + 1;
@ -1926,7 +1929,7 @@ timestamp_pl_interval(PG_FUNCTION_ARGS)
*tm = &tt;
fsec_t fsec;
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL) !=0)
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -2005,7 +2008,7 @@ timestamptz_pl_interval(PG_FUNCTION_ARGS)
*tm = &tt;
fsec_t fsec;
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn) !=0)
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -2332,8 +2335,8 @@ timestamp_age(PG_FUNCTION_ARGS)
result = (Interval *) palloc(sizeof(Interval));
if (timestamp2tm(dt1, NULL, tm1, &fsec1, NULL) == 0 &&
timestamp2tm(dt2, NULL, tm2, &fsec2, NULL) == 0)
if (timestamp2tm(dt1, NULL, tm1, &fsec1, NULL, NULL) == 0 &&
timestamp2tm(dt2, NULL, tm2, &fsec2, NULL, NULL) == 0)
{
fsec = (fsec1 - fsec2);
tm->tm_sec = tm1->tm_sec - tm2->tm_sec;
@ -2446,8 +2449,8 @@ timestamptz_age(PG_FUNCTION_ARGS)
result = (Interval *) palloc(sizeof(Interval));
if (timestamp2tm(dt1, &tz1, tm1, &fsec1, &tzn) == 0 &&
timestamp2tm(dt2, &tz2, tm2, &fsec2, &tzn) == 0)
if (timestamp2tm(dt1, &tz1, tm1, &fsec1, &tzn, NULL) == 0 &&
timestamp2tm(dt2, &tz2, tm2, &fsec2, &tzn, NULL) == 0)
{
fsec = fsec1 - fsec2;
tm->tm_sec = tm1->tm_sec - tm2->tm_sec;
@ -2750,7 +2753,7 @@ timestamp_trunc(PG_FUNCTION_ARGS)
if (type == UNITS)
{
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL) !=0)
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -2881,7 +2884,7 @@ timestamptz_trunc(PG_FUNCTION_ARGS)
if (type == UNITS)
{
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn) !=0)
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -3271,7 +3274,7 @@ timestamp_part(PG_FUNCTION_ARGS)
if (type == UNITS)
{
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL) !=0)
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -3405,7 +3408,7 @@ timestamp_part(PG_FUNCTION_ARGS)
* convert to timestamptz to produce consistent
* results
*/
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL) !=0)
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -3425,7 +3428,7 @@ timestamp_part(PG_FUNCTION_ARGS)
break;
}
case DTK_DOW:
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL) !=0)
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -3433,7 +3436,7 @@ timestamp_part(PG_FUNCTION_ARGS)
break;
case DTK_DOY:
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL) !=0)
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -3496,7 +3499,7 @@ timestamptz_part(PG_FUNCTION_ARGS)
if (type == UNITS)
{
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn) !=0)
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -3631,7 +3634,7 @@ timestamptz_part(PG_FUNCTION_ARGS)
break;
case DTK_DOW:
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn) !=0)
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -3639,7 +3642,7 @@ timestamptz_part(PG_FUNCTION_ARGS)
break;
case DTK_DOY:
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn) !=0)
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -3815,38 +3818,40 @@ timestamp_zone(PG_FUNCTION_ARGS)
{
text *zone = PG_GETARG_TEXT_P(0);
Timestamp timestamp = PG_GETARG_TIMESTAMP(1);
TimestampTz result;
Timestamp result;
int tz;
int type,
val;
char *lowzone;
pg_tz *tzp;
char tzname[TZ_STRLEN_MAX+1];
int len;
struct pg_tm tm;
fsec_t fsec;
if (TIMESTAMP_NOT_FINITE(timestamp))
PG_RETURN_TIMESTAMPTZ(timestamp);
lowzone = downcase_truncate_identifier(VARDATA(zone),
VARSIZE(zone) - VARHDRSZ,
false);
type = DecodeSpecial(0, lowzone, &val);
if (type == TZ || type == DTZ)
{
tz = -(val * 60);
result = dt2local(timestamp, tz);
}
else
{
/* Find the specified timezone? */
len = (VARSIZE(zone)-VARHDRSZ>TZ_STRLEN_MAX)?TZ_STRLEN_MAX:(VARSIZE(zone)-VARHDRSZ);
memcpy(tzname,VARDATA(zone),len);
tzname[len] = 0;
tzp = pg_tzset(tzname);
if (!tzp) {
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("time zone \"%s\" not recognized",
lowzone)));
errmsg("time zone \"%s\" not recognised",
tzname)));
PG_RETURN_NULL();
}
PG_RETURN_TIMESTAMPTZ(result);
/* Apply the timezone change */
if (timestamp2tm(timestamp, &tz, &tm, &fsec, NULL, tzp) != 0 ||
tm2timestamp(&tm, fsec, NULL, &result) != 0) {
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("could not convert to time zone \"%s\"",
tzname)));
PG_RETURN_NULL();
}
PG_RETURN_TIMESTAMPTZ(timestamp2timestamptz(result));
} /* timestamp_zone() */
/* timestamp_izone()
@ -3906,7 +3911,7 @@ timestamp2timestamptz(Timestamp timestamp)
else
{
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL) !=0)
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -3941,7 +3946,7 @@ timestamptz_timestamp(PG_FUNCTION_ARGS)
else
{
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn) !=0)
if (timestamp2tm(timestamp, &tz, tm, &fsec, &tzn, NULL) !=0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
@ -3950,7 +3955,6 @@ timestamptz_timestamp(PG_FUNCTION_ARGS)
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
}
PG_RETURN_TIMESTAMP(result);
}
@ -3966,31 +3970,34 @@ timestamptz_zone(PG_FUNCTION_ARGS)
Timestamp result;
int tz;
int type,
val;
char *lowzone;
pg_tz *tzp;
char tzname[TZ_STRLEN_MAX];
int len;
struct pg_tm tm;
fsec_t fsec = 0;
if (TIMESTAMP_NOT_FINITE(timestamp))
PG_RETURN_NULL();
lowzone = downcase_truncate_identifier(VARDATA(zone),
VARSIZE(zone) - VARHDRSZ,
false);
type = DecodeSpecial(0, lowzone, &val);
/* Find the specified zone */
len = (VARSIZE(zone)-VARHDRSZ>TZ_STRLEN_MAX)?TZ_STRLEN_MAX:(VARSIZE(zone)-VARHDRSZ);
memcpy(tzname,VARDATA(zone),len);
tzname[len] = 0;
tzp = pg_tzset(tzname);
if (type == TZ || type == DTZ)
{
tz = val * 60;
if (!tzp) {
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("time zone \"%s\" not recognized", tzname)));
result = dt2local(timestamp, tz);
PG_RETURN_NULL();
}
else
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("time zone \"%s\" not recognized", lowzone)));
if (timestamp2tm(timestamp, &tz, &tm, &fsec, NULL, tzp) != 0 ||
tm2timestamp(&tm, fsec, NULL, &result)) {
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("could not to convert to time zone \"%s\"", tzname)));
PG_RETURN_NULL();
}

6
src/include/pgtime.h
Unescape View File

@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/include/pgtime.h,v 1.7 2005/04/19 03:13:59 momjian Exp $
* $PostgreSQL: pgsql/src/include/pgtime.h,v 1.8 2005/06/15 00:34:09 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -57,4 +57,8 @@ extern bool tz_acceptable(pg_tz *tz);
extern const char *pg_get_timezone_name(pg_tz *tz);
extern pg_tz *global_timezone;
/* Maximum length of a timezone name */
#define TZ_STRLEN_MAX 255
#endif /* _PGTIME_H */

4
src/include/utils/timestamp.h
Unescape View File

@ -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);

4
src/timezone/pgtz.h
Unescape View File

@ -9,7 +9,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/timezone/pgtz.h,v 1.11 2005/04/19 03:13:59 momjian Exp $
* $PostgreSQL: pgsql/src/timezone/pgtz.h,v 1.12 2005/06/15 00:34:11 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -18,8 +18,6 @@
#include "tzfile.h"
#define TZ_STRLEN_MAX 255
extern char *pg_TZDIR(void);
#define BIGGEST(a, b) (((a) > (b)) ? (a) : (b))

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