pola-rs/polars · error · ComputeError

iceberg reader_override='native' failed: {fallback_reason}

Error message

iceberg reader_override='native' failed: {fallback_reason}

What it means

Error "iceberg reader_override='native' failed: {fallback_reason}" thrown in pola-rs/polars.

Source

Thrown at py-polars/src/polars/io/iceberg/_dataset.py:544

                position_delete_files=position_delete_files,
                deletion_vectors=deletion_vectors,
                min_max_statistics=min_max_statistics,
                statistics_loader=statistics_loader,
                storage_options=storage_options,
                row_count=(
                    (total_physical_rows, total_deleted_rows)
                    if (
                        self.use_metadata_statistics
                        and (self.fast_deletion_count or total_deleted_rows == 0)
                    )
                    else None
                ),
                snapshot_id_key=snapshot_id_key,
            )

        elif reader_override == "native":
            msg = f"iceberg reader_override='native' failed: {fallback_reason}"
            raise ComputeError(msg)

        if verbose:
            eprint(
                "IcebergScanResolver: to_dataset_scan(): "
                f"fallback to python[pyiceberg] scan: {fallback_reason}"
            )

        import polars.io.iceberg._utils

        func = partial(
            polars.io.iceberg._utils._scan_pyarrow_dataset_impl,
            tbl,
            snapshot_id=snapshot_id,
            n_rows=limit,
            with_columns=projection,
            iceberg_table_filter=iceberg_table_filter,
        )

View on GitHub (pinned to df599052da)

When it happens

Trigger: Thrown at py-polars/src/polars/io/iceberg/_dataset.py:544 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of pola-rs/polars@df599052da (2026-08-16). Data as JSON: /api/errors/c0684cb74f66a4af. Report an issue: GitHub.