neilconway commented on code in PR #20224:
URL: https://github.com/apache/datafusion/pull/20224#discussion_r2784224849
##########
datafusion/functions/src/datetime/to_timestamp.rs:
##########
@@ -430,27 +430,56 @@ impl ScalarUDFImpl for ToTimestampFunc {
.cast_to(&Timestamp(Second, None), None)?
.cast_to(&Timestamp(Nanosecond, tz), None),
Null | Timestamp(_, _) => args[0].cast_to(&Timestamp(Nanosecond,
tz), None),
- Float16 => {
- let arr = args[0].to_array(1)?;
- let f16_arr = downcast_arg!(&arr, Float16Array);
- let result: TimestampNanosecondArray =
- f16_arr.unary(|x| (x.to_f64() * 1_000_000_000.0) as i64);
-
Ok(ColumnarValue::Array(Arc::new(result.with_timezone_opt(tz))))
- }
- Float32 => {
- let arr = args[0].to_array(1)?;
- let f32_arr = downcast_arg!(&arr, Float32Array);
- let result: TimestampNanosecondArray =
- f32_arr.unary(|x| (x as f64 * 1_000_000_000.0) as i64);
-
Ok(ColumnarValue::Array(Arc::new(result.with_timezone_opt(tz))))
- }
- Float64 => {
- let arr = args[0].to_array(1)?;
- let f64_arr = downcast_arg!(&arr, Float64Array);
- let result: TimestampNanosecondArray =
- f64_arr.unary(|x| (x * 1_000_000_000.0) as i64);
-
Ok(ColumnarValue::Array(Arc::new(result.with_timezone_opt(tz))))
- }
+ Float16 => match &args[0] {
+ ColumnarValue::Scalar(ScalarValue::Float16(value)) => {
Review Comment:
I believe the current coding is correct -- `value.map()` will map `None` to
`None`. Lmk if I'm mistaken though.
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