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Cast unary not operations to result schema in cudf_polars #20522

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Cast unary not operations to result schema in cudf_polars #20522

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de167b7
Cast unary not operations to result schema in cudf_polars
mroeschke Nov 5, 2025
ac9f3bd
Merge remote-tracking branch 'upstream/main' into bug/cudf_polars/una…
mroeschke Nov 6, 2025
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8 changes: 6 additions & 2 deletions python/cudf_polars/cudf_polars/dsl/expressions/boolean.py
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Original file line number Diff line number Diff line change
Expand Up @@ -374,8 +374,12 @@ def do_evaluate(
elif self.name is BooleanFunction.Name.Not:
(column,) = columns
return Column(
plc.unary.unary_operation(
column.obj, plc.unary.UnaryOperator.NOT, stream=df.stream
plc.unary.cast(
plc.unary.unary_operation(
column.obj, plc.unary.UnaryOperator.NOT, stream=df.stream
),
self.dtype.plc_type,
stream=df.stream,
),
dtype=self.dtype,
)
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12 changes: 12 additions & 0 deletions python/cudf_polars/tests/test_select.py
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Expand Up @@ -68,6 +68,18 @@ def test_select_reduce():
assert_gpu_result_equal(query)


@pytest.mark.xfail(
reason=(
"Probably won't be fixed until 1.35.1 "
"https://github.com/pola-rs/polars/issues/24964"
)
)
def test_select_reduce_unary_not():
ldf = pl.LazyFrame({"c0": [1]})
query = ldf.select((~(pl.lit(1))).min().alias("literal"))
assert_gpu_result_equal(query)


def test_select_with_cse_no_agg():
df = pl.LazyFrame({"a": [1, 2, 3]})
expr = pl.col("a") + pl.col("a")
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