Dandandan commented on code in PR #7542:
URL: https://github.com/apache/arrow-datafusion/pull/7542#discussion_r1324143151
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datafusion/core/src/physical_plan/aggregates/mod.rs:
##########
@@ -567,6 +567,34 @@ fn calc_required_input_ordering(
Ok((!required_input_ordering.is_empty()).then_some(required_input_ordering))
}
+/// Check whether group by expression contains all of the expression inside
`requirement`
+// As an example Group By (c,b,a) contains all of the expressions in the
`requirement`: (a ASC, b DESC)
+fn group_by_contains_all_requirements(
+ group_by: &PhysicalGroupBy,
+ requirement: &LexOrdering,
+) -> bool {
+ // single group by expressions
+ if group_by.groups.len() <= 1 {
+ for req in requirement {
+ let physical_exprs = group_by
Review Comment:
This can be done outside loop?
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