Dandandan commented on code in PR #16087:
URL: https://github.com/apache/datafusion/pull/16087#discussion_r2094992836
##########
datafusion/functions/src/string/ascii.rs:
##########
@@ -103,19 +103,21 @@ impl ScalarUDFImpl for AsciiFunc {
fn calculate_ascii<'a, V>(array: V) -> Result<ArrayRef, ArrowError>
where
- V: ArrayAccessor<Item = &'a str>,
+ V: StringArrayType<'a, Item = &'a str>,
{
- let iter = ArrayIter::new(array);
- let result = iter
- .map(|string| {
- string.map(|s| {
- let mut chars = s.chars();
- chars.next().map_or(0, |v| v as i32)
- })
- })
- .collect::<Int32Array>();
-
- Ok(Arc::new(result) as ArrayRef)
+ let mut builder = Int32Builder::with_capacity(array.len());
Review Comment:
even faster is to avoid the builder, by collecting into a `Vec<i32>` and
clone the incoming bitmap.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org
For additional commands, e-mail: github-h...@datafusion.apache.org
