Fixed the faulty merge

sql/item_func.cc

@@ -3444,6 +3444,7 @@ static user_var_entry *get_variable(HASH *hash, LEX_STRING &name,
     entry->length=0;
     entry->update_query_id=0;
     entry->collation.set(NULL, DERIVATION_IMPLICIT);
+    entry->unsigned_flag= 0;
     /*
       If we are here, we were called from a SET or a query which sets a
       variable. Imagine it is this:
@@ -3587,6 +3588,7 @@ update_hash(user_var_entry *entry, bool set_null, void *ptr, uint length,
       ((my_decimal*)entry->value)->fix_buffer_pointer();
     entry->length= length;
     entry->collation.set(cs, dv);
+    entry->unsigned_flag= unsigned_arg;
   }
   entry->type=type;
   return 0;
@@ -3819,7 +3821,7 @@ Item_func_set_user_var::update()
   case REAL_RESULT:
   {
     res= update_hash((void*) &save_result.vreal,sizeof(save_result.vreal),
-		     REAL_RESULT, &my_charset_bin, DERIVATION_IMPLICIT);
+		     REAL_RESULT, &my_charset_bin, DERIVATION_IMPLICIT, 0);
     break;
   }
   case INT_RESULT:
@@ -3833,12 +3835,12 @@ Item_func_set_user_var::update()
   {
     if (!save_result.vstr)					// Null value
       res= update_hash((void*) 0, 0, STRING_RESULT, &my_charset_bin,
-		       DERIVATION_IMPLICIT);
+		       DERIVATION_IMPLICIT, 0);
     else
       res= update_hash((void*) save_result.vstr->ptr(),
 		       save_result.vstr->length(), STRING_RESULT,
 		       save_result.vstr->charset(),
-		       DERIVATION_IMPLICIT);
+		       DERIVATION_IMPLICIT, 0);
     break;
   }
   case DECIMAL_RESULT:

sql/log_event.cc

@@ -3923,7 +3923,7 @@ int User_var_log_event::exec_event(struct st_relay_log_info* rli)
     a single record and with a single column. Thus, like
     a column value, it could always have IMPLICIT derivation.
    */
-  e.update_hash(val, val_len, type, charset, DERIVATION_IMPLICIT);
+  e.update_hash(val, val_len, type, charset, DERIVATION_IMPLICIT, 0);
   free_root(thd->mem_root,0);
 
   rli->inc_event_relay_log_pos();

sql/sql_class.h

@@ -2018,6 +2018,7 @@ class user_var_entry
   ulong length;
   query_id_t update_query_id, used_query_id;
   Item_result type;
+  bool unsigned_flag;
 
   double val_real(my_bool *null_value);
   longlong val_int(my_bool *null_value);