Merge naruto.:C:/cpp/bug21811/my50-bug21811

into  naruto.:C:/cpp/mysql-5.0-maint


mysql-test/r/func_time.result:
  Auto merged
sql/item_timefunc.cc:
  Auto merged

2 files changed, 17 insertions, 10 deletions

diff --git a/sql/item_timefunc.cc b/sql/item_timefunc.cc
index 48d6458bd88..58b18cd0e7e 100644
--- a/sql/item_timefunc.cc
+++ b/sql/item_timefunc.cc
@@ -2151,11 +2151,15 @@ bool Item_date_add_interval::eq(const Item *item, bool binary_cmp) const
           (date_sub_interval == other->date_sub_interval));
 }
 
+/*
+   'interval_names' reflects the order of the enumeration interval_type.
+   See item_timefunc.h
+ */
 
 static const char *interval_names[]=
 {
-  "year", "quarter", "month", "day", "hour",
-  "minute", "week", "second", "microsecond",
+  "year", "quarter", "month", "week", "day",  
+  "hour", "minute", "second", "microsecond",
   "year_month", "day_hour", "day_minute", 
   "day_second", "hour_minute", "hour_second",
   "minute_second", "day_microsecond",
diff --git a/sql/item_timefunc.h b/sql/item_timefunc.h
index d5d3efeeab4..e79c62e6ffb 100644
--- a/sql/item_timefunc.h
+++ b/sql/item_timefunc.h
@@ -630,18 +630,21 @@ public:
 };
 
 /*
-  The following must be sorted so that simple intervals comes first.
-  (get_interval_value() depends on this)
+  'interval_type' must be sorted so that simple intervals comes first,
+  ie year, quarter, month, week, day, hour, etc. The order based on
+  interval size is also important and the intervals should be kept in a
+  large to smaller order. (get_interval_value() depends on this)
 */
 
 enum interval_type
 {
-  INTERVAL_YEAR, INTERVAL_QUARTER, INTERVAL_MONTH, INTERVAL_DAY, INTERVAL_HOUR,
-  INTERVAL_MINUTE, INTERVAL_WEEK, INTERVAL_SECOND, INTERVAL_MICROSECOND ,
-  INTERVAL_YEAR_MONTH, INTERVAL_DAY_HOUR, INTERVAL_DAY_MINUTE,
-  INTERVAL_DAY_SECOND, INTERVAL_HOUR_MINUTE, INTERVAL_HOUR_SECOND,
-  INTERVAL_MINUTE_SECOND, INTERVAL_DAY_MICROSECOND, INTERVAL_HOUR_MICROSECOND,
-  INTERVAL_MINUTE_MICROSECOND, INTERVAL_SECOND_MICROSECOND
+  INTERVAL_YEAR, INTERVAL_QUARTER, INTERVAL_MONTH, INTERVAL_WEEK, 
+  INTERVAL_DAY, INTERVAL_HOUR, INTERVAL_MINUTE, INTERVAL_SECOND, 
+  INTERVAL_MICROSECOND, INTERVAL_YEAR_MONTH, INTERVAL_DAY_HOUR, 
+  INTERVAL_DAY_MINUTE, INTERVAL_DAY_SECOND, INTERVAL_HOUR_MINUTE, 
+  INTERVAL_HOUR_SECOND, INTERVAL_MINUTE_SECOND, INTERVAL_DAY_MICROSECOND,
+  INTERVAL_HOUR_MICROSECOND, INTERVAL_MINUTE_MICROSECOND,
+  INTERVAL_SECOND_MICROSECOND
 };
 
 class Item_date_add_interval :public Item_date_func