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Fix interval division and multiplication, before: 

test=> select '4 months'::interval / 5;
	   ?column?
	---------------
	 1 mon -6 days
	(1 row)

after:

	test=> select '4 months'::interval / 5;
	 ?column?
	----------
	 24 days
	(1 row)

The problem was the use of rint() to round, and then find the remainder,
causing the negative values.
This commit is contained in:
Bruce Momjian 2005-07-20 03:50:24 +00:00
parent ca76df425b
commit 826604f9e6
1 changed files with 3 additions and 3 deletions
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6
src/backend/utils/adt/timestamp.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.132 2005/07/12 16:04:58 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.133 2005/07/20 03:50:24 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -2201,7 +2201,7 @@ interval_mul(PG_FUNCTION_ARGS)
result->time += (months - result->month) * INT64CONST(30) *
USECS_PER_DAY;
#else
result->month = rint(months);
result->month = (int)months;
result->time = JROUND(span1->time * factor);
/* evaluate fractional months as 30 days */
result->time += JROUND((months - result->month) * 30 * SECS_PER_DAY);
@ -2246,7 +2246,7 @@ interval_div(PG_FUNCTION_ARGS)
INT64CONST(30) * USECS_PER_DAY) / factor;
#else
months = span->month / factor;
result->month = rint(months);
result->month = (int)months;
result->time = JROUND(span->time / factor);
/* evaluate fractional months as 30 days */
result->time += JROUND((months - result->month) * 30 * SECS_PER_DAY);