tmi commented on code in PR #10899:
URL: https://github.com/apache/datafusion/pull/10899#discussion_r1638502083
##########
datafusion/functions/src/math/round.rs:
##########
@@ -128,29 +134,41 @@ pub fn round(args: &[ArrayRef]) -> Result<ArrayRef> {
}
)) as ArrayRef)
}
- ColumnarValue::Array(decimal_places) =>
Ok(Arc::new(make_function_inputs2!(
- &args[0],
- decimal_places,
- "value",
- "decimal_places",
- Float64Array,
- Int64Array,
- {
- |value: f64, decimal_places: i64| {
- (value *
10.0_f64.powi(decimal_places.try_into().unwrap()))
- .round()
- / 10.0_f64.powi(decimal_places.try_into().unwrap())
+ ColumnarValue::Array(_) => {
+ let ColumnarValue::Array(decimal_places) =
+ decimal_places.cast_to(&Int32, None).map_err(|e| {
+ exec_datafusion_err!("Invalid values for decimal
places: {e}")
+ })?
+ else {
+ panic!("Unexpected result of ColumnarValue::Array.cast")
Review Comment:
and the panic in the else part is there because we "forget" that the result
of the `cast_to` is still an array, ie, it doesnt change into a scalar. But
technically it's an unreachable part of the code
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