db.py 文件源码

def get_named_cursor():
    """
    This function returns a named cursor, which speeds up queries
    returning large result sets immensely by caching them on the
    server side.

    This is not yet supported by Django itself.
    """
    # This is required to populate the connection object properly
    if connection.connection is None:
        connection.cursor()

    # Prefixing the name to ensure that it starts with a letter.
    # Needed for psycopg2.2 compatibility
    name = 'nav{0}'.format(str(uuid.uuid4()).replace('-', ''))

    cursor = connection.connection.cursor(name=name)
    return cursor