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Make EXTRACT(TIMEZONE) and SET/SHOW TIMEZONE follow the SQL convention

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for the sign of timezone offsets, ie, positive is east from UTC.  These
were previously out of step with other operations that accept or show
timezones, such as I/O of timestamptz values.
This commit is contained in:
Tom Lane
2003-07-17 00:55:37 +00:00
parent 93236b58e0
commit 764f72dc82
10 changed files with 74 additions and 41 deletions
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13
src/backend/commands/variable.c
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@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/variable.c,v 1.81 2003/07/15 19:34:43 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/variable.c,v 1.82 2003/07/17 00:55:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -429,7 +429,8 @@ assign_timezone(const char *value, bool doit, bool interactive)
}
if (doit)
{
CTimeZone = interval->time;
/* Here we change from SQL to Unix sign convention */
CTimeZone = - interval->time;
HasCTZSet = true;
}
pfree(interval);
@ -444,7 +445,8 @@ assign_timezone(const char *value, bool doit, bool interactive)
{
if (doit)
{
CTimeZone = hours * 3600;
/* Here we change from SQL to Unix sign convention */
CTimeZone = - hours * 3600;
HasCTZSet = true;
}
}
@ -557,7 +559,8 @@ assign_timezone(const char *value, bool doit, bool interactive)
return NULL;
if (HasCTZSet)
snprintf(result, sizeof(tzbuf), "%.5f", (double) CTimeZone / 3600.0);
snprintf(result, sizeof(tzbuf), "%.5f",
(double) (-CTimeZone) / 3600.0);
else if (tzbuf[0] == 'T')
strcpy(result, tzbuf + 3);
else
@ -579,7 +582,7 @@ show_timezone(void)
Interval interval;
interval.month = 0;
interval.time = CTimeZone;
interval.time = - CTimeZone;
tzn = DatumGetCString(DirectFunctionCall1(interval_out,
IntervalPGetDatum(&interval)));