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Fixing issue with explode_outer position not nulling position entries of null rows #7754

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merged 4 commits into from
Mar 30, 2021
Merged

Fixing issue with explode_outer position not nulling position entries of null rows #7754

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6281f82
Fixing issue with explode_outer pos null entries
hyperbolic2346 Mar 29, 2021
95feefd
linting
hyperbolic2346 Mar 29, 2021
0f2d34d
Update cpp/src/lists/explode.cu
hyperbolic2346 Mar 30, 2021
7756567
linting
hyperbolic2346 Mar 30, 2021
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@hyperbolic2346
hyperbolic2346 committed Mar 29, 2021
commit 95feefd2908a69ce6a95db3b35ac2a42585df554
32 changes: 16 additions & 16 deletions cpp/src/lists/explode.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -63,23 +63,25 @@ std::unique_ptr<table> build_table(
std::vector<std::unique_ptr<column>> columns = gathered_table.release()->release();

auto inserted = columns.insert(columns.begin() + explode_column_idx,
explode_col_gather_map
? std::move(detail::gather(table_view({sliced_child}),
explode_col_gather_map->begin(),
explode_col_gather_map->end(),
cudf::out_of_bounds_policy::NULLIFY,
stream,
mr)
->release()[0])
: std::make_unique<column>(sliced_child, stream, mr));
explode_col_gather_map
? std::move(detail::gather(table_view({sliced_child}),
explode_col_gather_map->begin(),
explode_col_gather_map->end(),
cudf::out_of_bounds_policy::NULLIFY,
stream,
mr)
->release()[0])
: std::make_unique<column>(sliced_child, stream, mr));

if (position_array) {
size_type position_size = position_array->size();
// the null mask for position matches the exploded column's gather map, so copy it over
rmm::device_buffer nullmask = explode_col_gather_map ? copy_bitmask(*inserted->get()) : rmm::device_buffer(0, stream);
columns.insert(columns.begin() + explode_column_idx,
std::make_unique<column>(
data_type(type_to_id<size_type>()), position_size, position_array->release(), nullmask));
rmm::device_buffer nullmask =
explode_col_gather_map ? copy_bitmask(*inserted->get()) : rmm::device_buffer(0, stream);
columns.insert(
columns.begin() + explode_column_idx,
std::make_unique<column>(
data_type(type_to_id<size_type>()), position_size, position_array->release(), nullmask));
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}

return std::make_unique<table>(std::move(columns));
Expand Down Expand Up @@ -242,9 +244,7 @@ std::unique_ptr<table> explode_outer(table_view const& input_table,

// negative one to indicate a null value
explode_col_gather_map_p[invalid_index] = -1;
if (include_position) {
position_array[invalid_index] = 0;
}
if (include_position) { position_array[invalid_index] = 0; }
}
};

Expand Down
3 changes: 2 additions & 1 deletion cpp/tests/lists/explode_tests.cpp
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Expand Up @@ -884,7 +884,8 @@ TEST_F(ExplodeOuterTest, NullsInNestedDoubleExplode)

CUDF_TEST_EXPECT_TABLES_EQUAL(ret->view(), expected);

FCW expected_pos_col{{0, 1, 0, 0, 1, 2, 0, 1, 0, 1, 0, 0, 1}, {1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0}};
FCW expected_pos_col{{0, 1, 0, 0, 1, 2, 0, 1, 0, 1, 0, 0, 1},
{1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0}};
cudf::table_view pos_expected({expected_pos_col, expected_a, expected_b});

auto pos_ret = cudf::explode_outer_position(first_explode_ret->view(), 0);
Expand Down