def _parse_url(db_url):
return ParseResult(urlparse.urlparse(db_url))<EOL>
parse database connection urls into components

    UTA database connection URLs follow that of SQLAlchemy, except
    that a schema may be optionally specified after the database. The
    skeleton format is:

       driver://user:pass@host/database/schema

    >>> params = _parse_url("driver://user:pass@host:9876/database/schema")

    >>> params.scheme
    u'driver'

    >>> params.hostname
    u'host'

    >>> params.username
    u'user'

    >>> params.password
    u'pass'

    >>> params.database
    u'database'

    >>> params.schema
    u'schema'