diff options
Diffstat (limited to 'src/backend/utils/adt/timestamp.c')
| -rw-r--r-- | src/backend/utils/adt/timestamp.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/src/backend/utils/adt/timestamp.c b/src/backend/utils/adt/timestamp.c index 43800addf48..db9eea90982 100644 --- a/src/backend/utils/adt/timestamp.c +++ b/src/backend/utils/adt/timestamp.c @@ -5899,6 +5899,7 @@ NonFiniteIntervalPart(int type, int unit, char *lowunits, bool isNegative) case DTK_MILLISEC: case DTK_SECOND: case DTK_MINUTE: + case DTK_WEEK: case DTK_MONTH: case DTK_QUARTER: return 0.0; @@ -6018,12 +6019,27 @@ interval_part_common(PG_FUNCTION_ARGS, bool retnumeric) intresult = tm->tm_mday; break; + case DTK_WEEK: + intresult = tm->tm_mday / 7; + break; + case DTK_MONTH: intresult = tm->tm_mon; break; case DTK_QUARTER: - intresult = (tm->tm_mon / 3) + 1; + + /* + * We want to maintain the rule that a field extracted from a + * negative interval is the negative of the field's value for + * the sign-reversed interval. The broken-down tm_year and + * tm_mon aren't very helpful for that, so work from + * interval->month. + */ + if (interval->month >= 0) + intresult = (tm->tm_mon / 3) + 1; + else + intresult = -(((-interval->month % MONTHS_PER_YEAR) / 3) + 1); break; case DTK_YEAR: |