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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/utils/adt/timestamp.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/timestamp.c,v 1.85 2003/07/04 18:21:13 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/timestamp.c,v 1.86 2003/07/17 00:55:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -3080,17 +3080,18 @@ timestamptz_part(PG_FUNCTION_ARGS)
switch (val)
{
case DTK_TZ:
result = tz;
result = -tz;
break;
case DTK_TZ_MINUTE:
result = tz / 60;
TMODULO(result, dummy, 60e0);
result = -tz;
result /= 60;
FMODULO(result, dummy, 60e0);
break;
case DTK_TZ_HOUR:
dummy = tz;
TMODULO(dummy, result, 3600e0);
dummy = -tz;
FMODULO(dummy, result, 3600e0);
break;
case DTK_MICROSEC: