qst - why does filter(nw.col('temp').max() > 60) sometimes raise and sometimes not?

[MarcoGorelli]

from discord:

import pyarrow as pa
import narwhals as nw

t = pa.Table.from_pydict({
  "date": ["2025-01-01", "2025-02-01", "2025-03-01", "2025-04-01"],
  "temperature": [50, 60, 70, 80],
})

nw_f = nw.from_native(t)
column = "date"

print(
    nw_f
    .filter(
        nw.col("temperature").max() > 60,
    )
)

I think we should validate the length of the predicates in filter, and that this should raise consistently

If Polars allows it, then OK, we can leave that be, but for pandas and pyarrow i think we should raise