Compute function to generate date from year / month / day

[aandrestrumid]

Describe the enhancement requested

There are currently pyarrow functions converting a pa.date32() to its year / month / day. But there isn't a function that does the invert, accepting a year, a month and a day and returning a pa.date32.

The current work around involve either using python datetime.date (but it is slow and the range is limited). Alternatively one can build a date string from the component and parse it. But it's far from ideal

import pyarrow as pa
import pyarrow.compute as pc

table = pa.table({"year": [2024, 2025], "month": [3, 7], "day": [10, 4]})

date_str = pc.binary_join_element_wise(
    pc.cast(table["year"],  pa.string()),
    pc.utf8_lpad(pc.cast(table["month"], pa.string()), 2, "0"),
    pc.utf8_lpad(pc.cast(table["day"],   pa.string()), 2, "0"),
    "-"
)

dates = pc.cast(date_str, pa.date32())

Component(s)

Python