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From: Ian Kelly <ian.g.kelly@gmail.com>
Date: Wed, 12 Mar 2014 17:00:12 -0600
Subject: Re: DB API question - where is a stored procedure's return value?
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On Wed, Mar 12, 2014 at 3:44 PM, Skip Montanaro <skip@pobox.com> wrote:
> What do other database adaptors do about stored procedure return
> values? Does PEP 249 need revision?

I can't speak generally, but in cx_Oracle you either execute a query like this:

    result = cursor.var(cx_Oracle.NUMBER)
    cursor.execute(":1 := test_proc()", [result])
    print(result.getvalue())

or you use the non-standard callfunc method:

    print(cursor.callfunc("test_proc", cx_Oracle.NUMBER))

As a general solution, one might wrap a stored procedure that returns
a value into a stored procedure that has an output parameter and call
it with callproc.  Some implementations might include a return value
in the parameter list anyway.