1 files changed, 12 insertions, 0 deletions
diff --git a/activerecord/test/cases/adapter_test.rb b/activerecord/test/cases/adapter_test.rb
index 88136597e3..9463b7b14a 100644
--- a/activerecord/test/cases/adapter_test.rb
+++ b/activerecord/test/cases/adapter_test.rb
@@ -63,6 +63,18 @@ class AdapterTest < ActiveRecord::TestCase
     def test_show_nonexistent_variable_returns_nil
       assert_nil @connection.show_variable('foo_bar_baz')
     end
+
+    def test_not_specifying_database_name_for_cross_database_selects
+      assert_nothing_raised do
+        ActiveRecord::Base.establish_connection({
+          :adapter  => 'mysql',
+          :username => 'rails'
+        })
+        ActiveRecord::Base.connection.execute "SELECT activerecord_unittest.pirates.*, activerecord_unittest2.courses.* FROM activerecord_unittest.pirates, activerecord_unittest2.courses"
+      end
+
+      ActiveRecord::Base.establish_connection 'arunit'
+    end
   end
 
   if current_adapter?(:PostgreSQLAdapter)