MONTHNAME() & DAYNAME() are now UCS2 compatible

sql/item_timefunc.cc

@@ -160,7 +160,10 @@ String* Item_func_monthname::val_str(String* str)
     return (String*) 0;
   }
   null_value=0;
-  return &month_names[month-1];
+  
+  String *m=&month_names[month-1];
+  str->copy(m->ptr(), m->length(), m->charset(), thd_charset());
+  return str;
 }
 
 // Returns the quarter of the year
@@ -234,7 +237,10 @@ String* Item_func_dayname::val_str(String* str)
   uint weekday=(uint) val_int();		// Always Item_func_daynr()
   if (null_value)
     return (String*) 0;
-  return &day_names[weekday];
+  
+  String *d=&day_names[weekday];
+  str->copy(d->ptr(), d->length(), d->charset(), thd_charset());
+  return str;
 }
 
 

sql/item_timefunc.h

@@ -85,7 +85,12 @@ public:
   const char *func_name() const { return "monthname"; }
   String *val_str(String *str);
   enum Item_result result_type () const { return STRING_RESULT; }
-  void fix_length_and_dec() { decimals=0; max_length=10; maybe_null=1; }
+  void fix_length_and_dec() 
+  { 
+    decimals=0; 
+    max_length=10*thd_charset()->mbmaxlen;
+    maybe_null=1; 
+  }
 };
 
 
@@ -192,7 +197,12 @@ class Item_func_dayname :public Item_func_weekday
   const char *func_name() const { return "dayname"; }
   String *val_str(String *str);
   enum Item_result result_type () const { return STRING_RESULT; }
-  void fix_length_and_dec() { decimals=0; max_length=9; maybe_null=1; }
+  void fix_length_and_dec() 
+  { 
+    decimals=0; 
+    max_length=9*thd_charset()->mbmaxlen;
+    maybe_null=1; 
+  }
 };