Dandandan commented on code in PR #16087: URL: https://github.com/apache/datafusion/pull/16087#discussion_r2096161845
########## datafusion/functions/src/string/ascii.rs: ########## @@ -103,19 +103,22 @@ 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) - }) + let values: Vec<_> = (0..array.len()) + .map(|i| { + if array.is_null(i) { + 0 Review Comment: I had to look it up > Offsets must be monotonically increasing, that is offsets[j+1] >= offsets[j] for 0 <= j < length, even for null slots. This property ensures the location for all values is valid and well defined. -- 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