Kev1n8 commented on PR #11955:
URL: https://github.com/apache/datafusion/pull/11955#issuecomment-2284463629
Pasting a possible implementation of `StringViewArray` output here (current
implementation returns `StringArray`):
```
fn string_view_right(args: &[ArrayRef]) -> Result<ArrayRef> {
let string_array = as_string_view_array(&args[0])?;
let n_array = as_int64_array(&args[1])?;
let mut builder = StringViewBuilder::new();
let combined = string_array.iter().zip(n_array);
for iter in combined {
if let (Some(str), Some(n)) = iter {
match n.cmp(&0) {
Ordering::Less => {
let start = n.unsigned_abs() as usize;
let sub_string = &str[start..];
builder.append_value(sub_string);
}
Ordering::Equal => {
builder.append_null();
}
Ordering::Greater => {
let start = max(str.chars().count() as i64 - n, 0) as
usize;
let sub_string = &str[start..];
builder.append_value(sub_string);
}
}
} else {
builder.append_null();
}
}
let result = builder.finish();
Ok(Arc::new(result) as ArrayRef)
}
```
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