DiskANNSearchParams()Search-time parameters for DiskANN indexes.
All settings are exported with the diskann. prefix when used in SQL.
:param l_value_is: The value of the L parameter for DiskANN index searching. :type l_value_is: PositiveInt | None :param iterative_search: The iterative search mode for DiskANN index searching. :type iterative_search: DiskANNIterativeScanMode | None