stored procedures with sqlAlchemy

Question

How can I call stored procedures of sql server with sqlAlchemy?

Answer 1

Supposing you already have session created with sessionmaker(), you can use following function:

def exec_procedure(session, proc_name, params):
    sql_params = ",".join(["@{0}={1}".format(name, value) for name, value in params.items()])
    sql_string = """
        DECLARE @return_value int;
        EXEC    @return_value = [dbo].[{proc_name}] {params};
        SELECT 'Return Value' = @return_value;
    """.format(proc_name=proc_name, params=sql_params)

    return session.execute(sql_string).fetchall()

Now you can execute your stored procedure 'MyProc' with parameters simply like that:

params = {
    'Foo': foo_value,
    'Bar': bar_value
}
exec_procedure(session, 'MyProc', params)