pola-rs/polars · error · TypeError

cannot use NoopCatalog with {fn_name}()

Error message

cannot use NoopCatalog with {fn_name}()

What it means

Error "cannot use NoopCatalog with {fn_name}()" thrown in pola-rs/polars.

Source

Thrown at py-polars/src/polars/io/iceberg/_dataset.py:197

                    )
                    if fn_name == "scan_iceberg"
                    else ""
                )

                msg = (
                    f"failed to load catalog for {fn_name}() ({error = }). "
                    "Configure the default PyIceberg catalog, or pass "
                    "a catalog via the 'catalog' parameter, or pass a PyIceberg "
                    "table object instead of the name."
                    f"{static_metadata_hint}"
                )
                raise ComputeError(msg) from error

            catalog_config = IcebergCatalogConfig.from_catalog(default_catalog)

        if catalog_config.class_ == NoopCatalog:
            msg = f"cannot use NoopCatalog with {fn_name}()"
            raise TypeError(msg)

        return catalog_config


@dataclass(kw_only=True)
class IcebergScanResolver:
    """
    Iceberg scan resolver.

    Defers scan resolution to run during IR resolution.
    """

    table: IcebergTableWrap
    snapshot_id: int | None
    reader_override: Literal["native", "pyiceberg"] | None
    use_metadata_statistics: bool
    fast_deletion_count: bool
    use_pyiceberg_filter: bool

View on GitHub (pinned to df599052da)

When it happens

Trigger: Thrown at py-polars/src/polars/io/iceberg/_dataset.py:197 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/33669d74c5ba5b8c. Report an issue: GitHub.