alamb commented on code in PR #8806:
URL: https://github.com/apache/arrow-datafusion/pull/8806#discussion_r1446628993
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datafusion/physical-expr/src/equivalence/ordering.rs:
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@@ -29,11 +29,11 @@ use crate::{LexOrdering, PhysicalExpr, PhysicalSortExpr};
/// |a|b|c|d|
/// |1|4|3|1|
/// |2|3|3|2|
-/// |3|1|2|2|
-/// |3|2|1|3|
+/// |3|2|2|2|
+/// |3|1|1|3|
/// ```
///
-/// Here, both `vec![a ASC, b ASC]` and `vec![c DESC, d ASC]` describe the
table
Review Comment:
I think the original example is not `b ASC` itself, but it is `a ASC, b ASC`
(that is it is first sorted by `a ASC` and then for rows where `a` is the same
then the values are sorted by `b ASC`)
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