kszucs commented on a change in pull request #7478:
URL: https://github.com/apache/arrow/pull/7478#discussion_r442864422
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File path: cpp/src/arrow/compute/kernels/aggregate_basic.cc
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@@ -339,13 +366,38 @@ std::unique_ptr<KernelState> MeanInit(KernelContext* ctx,
const KernelInitArgs&
template <typename ArrowType, typename Enable = void>
struct MinMaxState {};
+template <typename ArrowType>
+struct MinMaxState<ArrowType, enable_if_boolean<ArrowType>> {
+ using ThisType = MinMaxState<ArrowType>;
+ using T = typename ArrowType::c_type;
+
+ ThisType& operator+=(const ThisType& rhs) {
+ this->has_nulls |= rhs.has_nulls;
+ this->has_values |= rhs.has_values;
Review comment:
@wesm I had to introduce a flag to check whether any of the arrays have
valid values, otherwise the default inverse extreme values were returned
instead of null.
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