suremarc commented on code in PR #9813:
URL: https://github.com/apache/arrow-datafusion/pull/9813#discussion_r1560045190
##########
datafusion/physical-expr/src/equivalence/mod.rs:
##########
@@ -45,6 +46,46 @@ pub fn collapse_lex_req(input: LexRequirement) ->
LexRequirement {
output
}
+/// This function constructs a normalized [`LexRequirement`] by filtering out
entries
+/// that are ordered if the next entry is.
Review Comment:
I think in this case we'd be modifying `collapse_lex_req` which is almost
the same, although it has a couple more callsites. I'll see if it works
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