1 files changed, 11 insertions, 0 deletions
diff --git a/sql/set_var.cc b/sql/set_var.cc
index 07395e3e708..a5b80e34993 100644
--- a/sql/set_var.cc
+++ b/sql/set_var.cc
@@ -686,6 +686,17 @@ sys_var *intern_find_sys_var(const char *str, uint length)
 }
 
 
+bool find_sys_var_null_base(THD *thd, struct sys_var_with_base *tmp)
+{
+  tmp->var= find_sys_var(thd, tmp->base_name.str, tmp->base_name.length);
+
+  if (tmp->var != NULL)
+    tmp->base_name= null_lex_str;
+
+  return thd->is_error();
+}
+
+
 /**
   Execute update of all variables.