1 files changed, 4 insertions, 3 deletions
diff --git a/sql/item_strfunc.h b/sql/item_strfunc.h
index 1b133d1d885..6520591145b 100644
--- a/sql/item_strfunc.h
+++ b/sql/item_strfunc.h
@@ -1177,14 +1177,14 @@ public:
 class Item_func_dyncol_json: public Item_str_func
 {
 public:
-  Item_func_dyncol_json(Item *str) :Item_str_func(str) {}
+  Item_func_dyncol_json(Item *str) :Item_str_func(str)
+    {collation.set(DYNCOL_UTF);}
   const char *func_name() const{ return "column_json"; }
   String *val_str(String *);
   void fix_length_and_dec()
   {
     max_length= MAX_BLOB_WIDTH;
     maybe_null= 1;
-    collation.set(&my_charset_bin);
     decimals= 0;
   }
 };
@@ -1218,7 +1218,8 @@ public:
 class Item_func_dyncol_list: public Item_str_func
 {
 public:
-  Item_func_dyncol_list(Item *str) :Item_str_func(str) {};
+  Item_func_dyncol_list(Item *str) :Item_str_func(str)
+    {collation.set(DYNCOL_UTF);};
   void fix_length_and_dec() { maybe_null= 1; max_length= MAX_BLOB_WIDTH; };
   const char *func_name() const{ return "column_list"; }
   String *val_str(String *);