pola-rs/polars · error · TypeError

Unknown: {lhs} {op} {rhs}

Error message

Unknown: {lhs} {op} {rhs}

What it means

Error "Unknown: {lhs} {op} {rhs}" thrown in pola-rs/polars.

Source

Thrown at py-polars/src/polars/io/iceberg/_utils.py:239

@_convert_predicate.register(Attribute)
def _(a: Attribute) -> Any:
    return a.attr


@_convert_predicate.register(BinOp)
def _(a: BinOp) -> Any:
    lhs = _ensure_boolean_expression(_convert_predicate(a.left))
    rhs = _ensure_boolean_expression(_convert_predicate(a.right))

    op = a.op
    if isinstance(op, BitAnd):
        return pyiceberg.expressions.And(lhs, rhs)
    if isinstance(op, BitOr):
        return pyiceberg.expressions.Or(lhs, rhs)
    else:
        msg = f"Unknown: {lhs} {op} {rhs}"
        raise TypeError(msg)


@_convert_predicate.register(Compare)
def _(a: Compare) -> Any:
    op = a.ops[0]
    lhs = _convert_predicate(a.left)[0]
    rhs = _convert_predicate(a.comparators[0])

    if isinstance(op, Gt):
        return pyiceberg.expressions.GreaterThan(lhs, rhs)  # type: ignore[misc, call-arg]
    if isinstance(op, GtE):
        return pyiceberg.expressions.GreaterThanOrEqual(lhs, rhs)  # type: ignore[misc, call-arg]
    if isinstance(op, Eq):
        return pyiceberg.expressions.EqualTo(lhs, rhs)  # type: ignore[misc, call-arg]
    if isinstance(op, Lt):
        return pyiceberg.expressions.LessThan(lhs, rhs)  # type: ignore[misc, call-arg]
    if isinstance(op, LtE):
        return pyiceberg.expressions.LessThanOrEqual(lhs, rhs)  # type: ignore[misc, call-arg]

View on GitHub (pinned to df599052da)

When it happens

Trigger: Thrown at py-polars/src/polars/io/iceberg/_utils.py:239 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/42083c47bb27673c. Report an issue: GitHub.