use crate::prelude::*;
impl Utf8Chunked {
/// Convert an [`Utf8Chunked`] to a [`Series`] of [`DataType::Decimal`].
/// The parameters needed for the decimal type are inferred.
///
/// If the decimal `precision` and `scale` are already known, consider
/// using the `cast` method.
pub fn to_decimal(&self, infer_length: usize) -> PolarsResult<Series> {
let mut scale = 0;
let mut iter = self.into_iter();
let mut valid_count = 0;
while let Some(Some(v)) = iter.next() {
if let Some(scale_value) = arrow::legacy::compute::decimal::infer_scale(v.as_bytes()) {
scale = std::cmp::max(scale, scale_value);
valid_count += 1;
if valid_count == infer_length {
break;
}
}
}
self.cast(&DataType::Decimal(None, Some(scale as usize)))
}
}