pitrou commented on a change in pull request #11005:
URL: https://github.com/apache/arrow/pull/11005#discussion_r699452309
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File path: cpp/src/arrow/compute/kernels/aggregate_test.cc
##########
@@ -2264,6 +2264,16 @@ class TestPrimitiveVarStdKernel : public ::testing::Test
{
AssertVarStdIsInvalid(array, options);
}
+ void AssertVarStdIsNull(const std::string& json, const VarianceOptions&
options) {
Review comment:
Isn't this exactly the same as `AssertVarStdIsInvalid`?
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File path: cpp/src/arrow/compute/kernels/aggregate_var_std.cc
##########
@@ -135,9 +142,11 @@ struct VarStdState {
&this->mean, &this->m2);
}
+ VarianceOptions options;
int64_t count = 0;
double mean = 0;
double m2 = 0; // m2 = count*s2 = sum((X-mean)^2)
+ bool valid = true;
Review comment:
Should this be called `all_valid` for clarity?
##########
File path: cpp/src/arrow/compute/kernels/aggregate_var_std.cc
##########
@@ -135,9 +142,11 @@ struct VarStdState {
&this->mean, &this->m2);
}
+ VarianceOptions options;
Review comment:
Nit: make this `const`?
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