a fix (bug #10339: Incorrect error is displayed if try to set value of internal ' warning_count ').

1 files changed, 2 insertions, 0 deletions

diff --git a/sql/set_var.h b/sql/set_var.h
index 32f45187124..37522a0b753 100644
--- a/sql/set_var.h
+++ b/sql/set_var.h
@@ -75,6 +75,7 @@ public:
   { return option_limits == 0; }
   Item *item(THD *thd, enum_var_type type, LEX_STRING *base);
   virtual bool is_struct() { return 0; }
+  virtual bool is_readonly() const { return 0; }
 };
 
 
@@ -699,6 +700,7 @@ public:
     return (*value_ptr_func)(thd);
   }
   SHOW_TYPE type() { return show_type; }
+  bool is_readonly() const { return 1; }
 };
 
 class sys_var_thd_time_zone :public sys_var_thd