alamb commented on code in PR #10057:
URL: https://github.com/apache/arrow-rs/pull/10057#discussion_r3721911169
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arrow-select/src/coalesce.rs:
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@@ -722,17 +722,25 @@ trait InProgressArray: std::fmt::Debug + Send + Sync {
/// Copy rows from the current source array into the in-progress array
///
- /// The source array is set by [`Self::set_source`].
+ /// Note: The source array is set by [`Self::set_source`].
///
/// Return an error if the source array is not set
fn copy_rows(&mut self, offset: usize, len: usize) -> Result<(),
ArrowError>;
/// Copy rows selected by `filter` from the current source array.
+ ///
+ /// The default implementation calls [`Self::copy_rows_by_selection`]
fn copy_rows_by_filter(&mut self, filter: &FilterPredicate) -> Result<(),
ArrowError> {
self.copy_rows_by_selection(filter.selection())
}
- /// Copy rows selected by `filter` from `source`.
+ /// Copy rows selected by a [`FilterPredicate`] from `source`.
+ ///
+ /// Unlike the other copy methods, the source array is passed in directly
+ /// rather than read from the array set by [`Self::set_source`].
+ ///
+ /// The default implementation sets `source` via [`Self::set_source`] and
+ /// then calls [`Self::copy_rows_by_filter`].
Review Comment:
I tried to clarify in bcad2a8122644c99ba4ca6da0a144c1b7dbe18b6
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