Bug# 20730103 BACKPORT 19688008 TO 5.1

Problem: UDF doesn't handle the arguments properly when they are of string type due to a misplaced break. The length of arguments is also not set properly when the argument is NULL. Solution: Fixed the code by putting the break at right place and setting the argument length to zero when the argument is NULL.

Author: Vamsikrishna Bhagi

sql/item_func.cc

@@ -1,4 +1,4 @@
-/* Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
+/* Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
 
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -3029,8 +3029,12 @@ bool udf_handler::get_arguments()
 {
  f_args.args[i]= (char*) res->ptr();
  f_args.lengths[i]= res->length();
- break;
 }
+else
+{
+ f_args.lengths[i]= 0;
+}
+break;
  }
  case INT_RESULT:
  *((longlong*) to) = args[i]->val_int();