fixed printing of sum(distinct ) & avg(distinct ) & cast(... as decimal) (BUG#7015, BUG#11387)

mysql-test/r/view.result:
  using sum(distinct ), cast(... as decimal) & avg(distinct ) in views
mysql-test/t/view.test:
  using sum(distinct ), cast(... as decimal) & avg(distinct ) in views
sql/item.h:
  Add a comment for Item::print
sql/item_func.cc:
  Use functype(), not func_name() for item equvalence detection
sql/item_func.h:
  Missed function typoes added
  Add a comment for Item_func::func_name()
  style fix
sql/item_strfunc.cc:
  Use functype(), not func_name() for item equvalence detection
sql/item_strfunc.h:
  Add missing func_name and func_type
sql/item_sum.cc:
  Item_sum func_name report beggining of function till first argument
sql/item_sum.h:
  Item_sum func_name report beggining of function till first argument
sql/item_timefunc.cc:
  Use functype(), not func_name() for item equvalence detection
sql/item_timefunc.h:
  Add missing func_name and func_type
sql/item_uniq.h:
  Add missing func_name

1 files changed, 2 insertions, 0 deletions

diff --git a/sql/item_uniq.h b/sql/item_uniq.h
index 14b2e8d53bb..e95aa35101e 100644
--- a/sql/item_uniq.h
+++ b/sql/item_uniq.h
@@ -30,6 +30,7 @@ public:
   double val_real() { DBUG_ASSERT(fixed == 1); return 0.0; }
   void fix_length_and_dec() { decimals=0; max_length=6; }
   void print(String *str) { str->append("0.0", 3); }
+  const char *func_name() const { return "unique_users"; }
 };
 
 
@@ -58,4 +59,5 @@ public:
   }
   void print(String *str) { str->append("0.0", 3); }
   Field *create_tmp_field(bool group, TABLE *table, uint convert_blob_length);
+  const char *func_name() const { return "sum_unique_users"; }
 };