Cannot execute stored procedure in Rails 3 and mysql2 gem

Hi All,

Suppose I have a stored procedure named procedure().

Running ActiveRecord::Base.connection.execute("CALL procedure()") will
give you a bunch of errors in different cases while using mysql2 adapter
like:

ActiveRecord::StatementInvalid: Mysql2::Error: PROCEDURE can't return a
result set in the given context: procedure() PROCEDURE

or

ActiveRecord::StatementInvalid: Mysql2::Error: Commands out of sync; you
can't run this command now.

How can The problem be solved? Need Assistance.

Best Regards,

Nirmalya Ghosh

Hello Nirmalya,

It's a very important question which you have right now, fortunately I
think I know the answer, here I am giving you the solution ---

Solution :
When MySQL runs stored procedure it has to know that client can handle
multiple result sets.

We will create patch file for that in our initializer folder of our
application.

Create mysql2_adapter.rb file in config/initializers with the following
content:

module ActiveRecord
  class Base
  # Overriding ActiveRecord::Base.mysql2_connection
  # method to allow passing options from database.yml

Thanks Zinia for the reply and I think I got the answer.

Thanks Again.

Best Regards,

Nirmalya Ghosh

Zinia Dutta Gupta wrote in post #1141735: