[Zope] ZSQL Methods and transaction control

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Hi there,

I am implementing a tool to handle userdata that is stored in a MySQL
db. The underlaying logic of the stored procedures used to maintain the
db content dictate that I have to control the transactions myself.

I understand that there is a way to handle transaction control in the
ZMySQL methods. However I find no documentation at all on how to use it.

Without using ZMySQL methods I would be using the following piece of code:
db = mysql.connect(host="localhost" ...)
cursor = db.cursor()
query = "CALL insertUser('%s', '$xxx$', @id, @error);select @id, \
    @error" % 'JohnTheUser')
cursor.execute(query)
# get the next resultset, it has the result of the select
cursor.nextset()
result = cursor.fetchall()[0]
error = int(result[1])
if error:
    print "error %s when trying to add user %s" % (ERRRORS[error],\
        'JohnTheUser')
    db.rollback()
    continue #we are in a loop actually
..
db.commit()

How can I mimic that using ZSQL Methods

thanks for any pointers
Robert


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