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Fix null check when comparing structs in min and max reduction/groupby operations #9994

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merged 3 commits into from Jan 11, 2022
Merged

Fix null check when comparing structs in min and max reduction/groupby operations #9994

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3db45d8
Fix null check and add unit tests
ttnghia Jan 7, 2022
d61bf52
Update copyright year
ttnghia Jan 11, 2022
8600e7b
Merge branch 'branch-22.02' into fix_null_check
ttnghia Jan 11, 2022
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3 changes: 2 additions & 1 deletion cpp/src/reductions/struct_minmax_util.cuh
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Expand Up @@ -23,6 +23,7 @@
#include <cudf/detail/utilities/vector_factories.hpp>
#include <cudf/table/row_operators.cuh>
#include <cudf/table/table_device_view.cuh>
#include <cudf/table/table_view.hpp>

namespace cudf {
namespace reduction {
Expand Down Expand Up @@ -97,7 +98,7 @@ class comparison_binop_generator {
table_view{{input}}, {}, std::vector<null_order>{DEFAULT_NULL_ORDER})},
d_flattened_input_ptr{table_device_view::create(flattened_input, stream)},
is_min_op(is_min_op),
has_nulls{input.has_nulls()},
has_nulls{has_nested_nulls(table_view{{input}})},
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null_orders_dvec(0, stream)
{
if (is_min_op) {
Expand Down
21 changes: 21 additions & 0 deletions cpp/tests/groupby/max_tests.cpp
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Expand Up @@ -388,5 +388,26 @@ TEST_F(groupby_max_struct_test, null_keys_and_values)
test_single_agg(keys, vals, expect_keys, expect_vals, std::move(agg));
}

TEST_F(groupby_max_struct_test, values_with_null_child)
{
constexpr int32_t null{0};
auto const keys = fixed_width_column_wrapper<int32_t>{1, 1};
auto const vals = [] {
auto child1 = fixed_width_column_wrapper<int32_t>{1, 1};
auto child2 = fixed_width_column_wrapper<int32_t>{{-1, null}, null_at(1)};
return structs_column_wrapper{child1, child2};
}();

auto const expect_keys = fixed_width_column_wrapper<int32_t>{1};
auto const expect_vals = [] {
auto child1 = fixed_width_column_wrapper<int32_t>{1};
auto child2 = fixed_width_column_wrapper<int32_t>{-1};
return structs_column_wrapper{child1, child2};
}();

auto agg = cudf::make_max_aggregation<groupby_aggregation>();
test_single_agg(keys, vals, expect_keys, expect_vals, std::move(agg));
}

} // namespace test
} // namespace cudf
21 changes: 21 additions & 0 deletions cpp/tests/groupby/min_tests.cpp
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Expand Up @@ -387,5 +387,26 @@ TEST_F(groupby_min_struct_test, null_keys_and_values)
test_single_agg(keys, vals, expect_keys, expect_vals, std::move(agg));
}

TEST_F(groupby_min_struct_test, values_with_null_child)
{
constexpr int32_t null{0};
auto const keys = fixed_width_column_wrapper<int32_t>{1, 1};
auto const vals = [] {
auto child1 = fixed_width_column_wrapper<int32_t>{1, 1};
auto child2 = fixed_width_column_wrapper<int32_t>{{-1, null}, null_at(1)};
return structs_column_wrapper{child1, child2};
}();

auto const expect_keys = fixed_width_column_wrapper<int32_t>{1};
auto const expect_vals = [] {
auto child1 = fixed_width_column_wrapper<int32_t>{1};
auto child2 = fixed_width_column_wrapper<int32_t>{{null}, null_at(0)};
return structs_column_wrapper{child1, child2};
}();

auto agg = cudf::make_min_aggregation<groupby_aggregation>();
test_single_agg(keys, vals, expect_keys, expect_vals, std::move(agg));
}

} // namespace test
} // namespace cudf