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Merged
rapids-bot merged 3 commits into from
Jul 9, 2026
Merged

Support pl.Expr.dt.quarter #23157

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32425a4
Support pl.Expr.dt.quarter in cudf_polars
mroeschke Jul 7, 2026
1fd7e48
Merge remote-tracking branch 'upstream/main' into cudf_polars/enh/dt_…
mroeschke Jul 8, 2026
332a86a
Merge remote-tracking branch 'upstream/main' into cudf_polars/enh/dt_…
mroeschke Jul 9, 2026
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7 changes: 7 additions & 0 deletions python/cudf_polars/cudf_polars/dsl/expressions/datetime.py
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Original file line number Diff line number Diff line change
Expand Up @@ -152,6 +152,7 @@ def from_polars(cls, obj: polars._expr_nodes.TemporalFunction) -> Self:
Name.CastTimeUnit,
Name.Truncate,
Name.DaysInMonth,
Name.Quarter,
*_CENTURY_MILLENNIUM_DIVISOR.keys(),
*_TOTAL_COMPONENT_NANOSECONDS.keys(),
}
Expand Down Expand Up @@ -239,6 +240,12 @@ def do_evaluate(
plc.datetime.days_in_month(column.obj, stream=df.stream),
dtype=DataType(pl.Int16()),
).astype(self.dtype, stream=df.stream)
elif self.name is TemporalFunction.Name.Quarter:
(column,) = columns
return Column(
plc.datetime.extract_quarter(column.obj, stream=df.stream),
dtype=DataType(pl.Int16()),
).astype(self.dtype, stream=df.stream)
elif self.name in self._CENTURY_MILLENNIUM_DIVISOR:
(column,) = columns
int32 = plc.DataType(plc.TypeId.INT32)
Expand Down
21 changes: 21 additions & 0 deletions python/cudf_polars/tests/expressions/test_datetime_basic.py
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Expand Up @@ -529,6 +529,27 @@ def test_datetime_truncate_unsupported(engine: pl.GPUEngine, every: str):
assert_ir_translation_raises(q, engine, NotImplementedError)


@pytest.mark.parametrize(
"dtype", [pl.Date(), pl.Datetime("ms"), pl.Datetime("us"), pl.Datetime("ns")]
)
def test_datetime_quarter(engine: pl.GPUEngine, dtype):
data = pl.Series(
[
datetime.date(2001, 1, 1),
datetime.date(2001, 3, 31),
datetime.date(2001, 4, 1),
datetime.date(2001, 6, 30),
datetime.date(2001, 9, 15),
datetime.date(2001, 12, 27),
None,
],
dtype=pl.Date(),
).cast(dtype)
ldf = pl.LazyFrame({"dates": data})
q = ldf.select(pl.col("dates").dt.quarter())
assert_gpu_result_equal(q, engine=engine)


@pytest.mark.parametrize(
"dtype", [pl.Date(), pl.Datetime("ms"), pl.Datetime("us"), pl.Datetime("ns")]
)
Expand Down
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