pitrou commented on code in PR #45562:
URL: https://github.com/apache/arrow/pull/45562#discussion_r1975120637
##########
cpp/src/arrow/compute/api_aggregate.h:
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@@ -175,6 +175,88 @@ class ARROW_EXPORT TDigestOptions : public FunctionOptions
{
uint32_t min_count;
};
+/// \brief Control Pivot kernel behavior
+///
+/// These options apply to the "pivot_wider" and "hash_pivot_wider" functions.
+///
+/// Constraints:
+/// - The corresponding `Aggregate::target` must have two FieldRef elements;
Review Comment:
Multiple pivot key columns are not supported at all (the pivot key must be
string-like). Multiple pivot value columns can indeed be achieved using a
`struct`.
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