Initialize connection and create table if needed

def _init_client():
    """Initialize connection and create table if needed
    """
    if client is not None:
        return

    global _mysql_kwargs, _table_name
    _mysql_kwargs = {
        'host': __opts__.get('mysql.host', '127.0.0.1'),
        'user': __opts__.get('mysql.user', None),
        'passwd': __opts__.get('mysql.password', None),
        'db': __opts__.get('mysql.database', _DEFAULT_DATABASE_NAME),
        'port': __opts__.get('mysql.port', 3306),
        'unix_socket': __opts__.get('mysql.unix_socket', None),
        'connect_timeout': __opts__.get('mysql.connect_timeout', None),
        'autocommit': True,
    }
    _table_name = __opts__.get('mysql.table_name', _table_name)
    # TODO: handle SSL connection parameters

    for k, v in _mysql_kwargs.items():
        if v is None:
            _mysql_kwargs.pop(k)
    kwargs_copy = _mysql_kwargs.copy()
    kwargs_copy['passwd'] = "<hidden>"
    log.info("mysql_cache: Setting up client with params: %r", kwargs_copy)
    # The MySQL client is created later on by run_query
    _create_table()