I corecting date_trunc('quarter',...) and friends because orig version
doing '2003-07-30' -> '2003-04-01', '2003-11-30' ->'2003-07-01'
--- src/backend/utils/adt/timestamp.c
+++ src/backend/utils/adt/timestamp.c
@@ -2412,7 +2412,7 @@
case DTK_YEAR:
tm->tm_mon = 1;
case DTK_QUARTER:
- tm->tm_mon = (3 * (tm->tm_mon / 4)) + 1;
+ tm->tm_mon = (3 * ((tm->tm_mon - 1) / 3)) + 1;
case DTK_MONTH:
tm->tm_mday = 1;
case DTK_DAY:
@@ -2505,7 +2505,7 @@
case DTK_YEAR:
tm->tm_mon = 1;
case DTK_QUARTER:
- tm->tm_mon = (3 * (tm->tm_mon / 4)) + 1;
+ tm->tm_mon = (3 * ((tm->tm_mon - 1) / 3)) + 1;
case DTK_MONTH:
tm->tm_mday = 1;
case DTK_DAY:
@@ -2598,7 +2598,7 @@
case DTK_YEAR:
tm->tm_mon = 0;
case DTK_QUARTER:
- tm->tm_mon = (3 * (tm->tm_mon / 4));
+ tm->tm_mon = (3 * (tm->tm_mon / 3));
case DTK_MONTH:
tm->tm_mday = 0;
case DTK_DAY:
@@ -3175,7 +3175,7 @@
break;
case DTK_QUARTER:
- result = (tm->tm_mon / 4) + 1;
+ result = (tm->tm_mon / 3) + 1;
break;
case DTK_YEAR:
