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Fix interval input parser so that fractional weeks and months are

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cascaded first to days and only what is leftover into seconds.  This
seems to satisfy the principle of least surprise given the general
conversion to three-part interval values --- it was an oversight that
these cases weren't dealt with in 8.1.  Michael Glaesemann
This commit is contained in:
Tom Lane
2006-09-04 01:26:28 +00:00
parent 091fe03775
commit 57bfb27e60
4 changed files with 72 additions and 30 deletions
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44
src/backend/utils/adt/datetime.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.169 2006/07/25 03:51:21 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.170 2006/09/04 01:26:27 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -2920,16 +2920,23 @@ DecodeInterval(char **field, int *ftype, int nf, int *dtype, struct pg_tm * tm,
tm->tm_mday += val * 7;
if (fval != 0)
{
int sec;
fval *= 7 * SECS_PER_DAY;
sec = fval;
tm->tm_sec += sec;
int extra_days;
fval *= 7;
extra_days = (int32) fval;
tm->tm_mday += extra_days;
fval -= extra_days;
if (fval != 0)
{
int sec;
fval *= SECS_PER_DAY;
sec = fval;
tm->tm_sec += sec;
#ifdef HAVE_INT64_TIMESTAMP
*fsec += (fval - sec) * 1000000;
*fsec += (fval - sec) * 1000000;
#else
*fsec += fval - sec;
*fsec += fval - sec;
#endif
}
}
tmask = (fmask & DTK_M(DAY)) ? 0 : DTK_M(DAY);
break;
@ -2938,16 +2945,23 @@ DecodeInterval(char **field, int *ftype, int nf, int *dtype, struct pg_tm * tm,
tm->tm_mon += val;
if (fval != 0)
{
int sec;
fval *= DAYS_PER_MONTH * SECS_PER_DAY;
sec = fval;
tm->tm_sec += sec;
int day;
fval *= DAYS_PER_MONTH;
day = fval;
tm->tm_mday += day;
fval -= day;
if (fval != 0)
{
int sec;
fval *= SECS_PER_DAY;
sec = fval;
tm->tm_sec += sec;
#ifdef HAVE_INT64_TIMESTAMP
*fsec += (fval - sec) * 1000000;
*fsec += (fval - sec) * 1000000;
#else
*fsec += fval - sec;
*fsec += fval - sec;
#endif
}
}
tmask = DTK_M(MONTH);
break;