alamb commented on a change in pull request #2107: URL: https://github.com/apache/arrow-datafusion/pull/2107#discussion_r836641657
########## File path: datafusion-physical-expr/src/expressions/binary.rs ########## @@ -135,260 +135,192 @@ fn is_not_distinct_from_bool( // TODO move decimal kernels to to arrow-rs // https://github.com/apache/arrow-rs/issues/1200 -// TODO use iter added for for decimal array in -// https://github.com/apache/arrow-rs/issues/1083 +/// Creates an BooleanArray the same size as `left`, +/// applying `op` to all non-null elements of left +fn compare_decimal_scalar<F>( + left: &DecimalArray, + right: i128, + op: F, +) -> Result<BooleanArray> +where + F: Fn(i128, i128) -> bool, +{ + Ok(left + .iter() + .map(|left| left.map(|left| op(left, right))) + .collect()) +} + +/// Creates an BooleanArray the same size as `left`, +/// by applying `op` to all non-null elements of left and right +fn compare_decimal<F>( + left: &DecimalArray, + right: &DecimalArray, + op: F, +) -> Result<BooleanArray> +where + F: Fn(i128, i128) -> bool, +{ + Ok(left + .iter() + .zip(right.iter()) + .map(|(left, right)| { + if let (Some(left), Some(right)) = (left, right) { + Some(op(left, right)) + } else { + None + } + }) + .collect()) +} + pub(super) fn eq_decimal_scalar( left: &DecimalArray, right: i128, ) -> Result<BooleanArray> { - let mut bool_builder = BooleanBuilder::new(left.len()); - for i in 0..left.len() { - if left.is_null(i) { - bool_builder.append_null()?; - } else { - bool_builder.append_value(left.value(i) == right)?; - } - } - Ok(bool_builder.finish()) + compare_decimal_scalar(left, right, |left, right| left == right) Review comment: This PR simply refactors out the common iteration over inputs into `compare_decimal` and `compare_decimal_scalar` -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
