WL3527: 5.1

 renamed "--old-mode" to "--old" to prevent
 ambiguity.
 "old" now appears in SHOW VARIABLES as a
 read-only option.


mysql-test/r/group_by.result:
  WL3527: 5.1 test case
mysql-test/t/group_by.test:
  WL3527: 5.1 test case
sql/mysqld.cc:
  WL3527: 5.1
   renamed the "old-mode" to "old" to fit
   the options naming scheme
sql/set_var.cc:
  WL3527: 5.1
   added "-old" as read-only system variable
sql/set_var.h:
  WL3527: 5.1
   added class for boolean pointer read-only 
   option to support the "--old" option.
sql/sql_base.cc:
  fixed 5.0->5.1 merge problems.

1 files changed, 10 insertions, 0 deletions

diff --git a/sql/set_var.h b/sql/set_var.h
index 8887d91ec69..eac03fce610 100644
--- a/sql/set_var.h
+++ b/sql/set_var.h
@@ -169,6 +169,16 @@ public:
 };
 
 
+class sys_var_bool_ptr_readonly :public sys_var_bool_ptr
+{
+public:
+  sys_var_bool_ptr_readonly(const char *name_arg, my_bool *value_arg)
+    :sys_var_bool_ptr(name_arg, value_arg)
+  {}
+  bool is_readonly() const { return 1; }
+};
+
+
 class sys_var_str :public sys_var
 {
 public: