Generate group offsets from element labels#11017
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rapids-bot[bot] merged 67 commits intorapidsai:branch-22.08from Jun 3, 2022
Merged
Generate group offsets from element labels#11017rapids-bot[bot] merged 67 commits intorapidsai:branch-22.08from
rapids-bot[bot] merged 67 commits intorapidsai:branch-22.08from
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Signed-off-by: Nghia Truong <nghiatruong.vn@gmail.com>
Signed-off-by: Nghia Truong <nghiatruong.vn@gmail.com>
Signed-off-by: Nghia Truong <nghiatruong.vn@gmail.com>
Signed-off-by: Nghia Truong <nghiatruong.vn@gmail.com>
Signed-off-by: Nghia Truong <nghiatruong.vn@gmail.com>
# Conflicts: # cpp/include/cudf/detail/labeling/label_segments.cuh # cpp/src/lists/drop_list_duplicates.cu
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This PR adds the following APIs for set operations: * `lists::have_overlap` * `lists::intersect_distinct` * `lists::union_distinct` * `lists::difference_distinct` ### Name Convention Except for the first API (`lists::have_overlap`) that returns a boolean column, the suffix `_distinct` of the rest APIs denotes that their results will be lists columns in which all list rows have been post-processed to remove duplicates. As such, their results are actually "set" columns in which each row is a "set" of distinct elements. --- Depends on: * #10945 * #11017 * NVIDIA/cuCollections#175 * #11052 * #11118 * #11100 * #11149 Closes #10409. Authors: - Nghia Truong (https://github.com/ttnghia) - Yunsong Wang (https://github.com/PointKernel) Approvers: - Michael Wang (https://github.com/isVoid) - AJ Schmidt (https://github.com/ajschmidt8) - Bradley Dice (https://github.com/bdice) - Yunsong Wang (https://github.com/PointKernel) URL: #11043
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Given an array of integer values which may be the labels of some list elements, we want to generate an array of offsets so we can create a lists column from these offsets.
For example:
This is basically the reverse operation of #10945.
Closes #10955.