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[gpuCI] Forward-merge branch-21.10 to branch-21.12 [skip gpuci] #9298

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merged 1 commit into from
Sep 24, 2021

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Forward-merge triggered by push to branch-21.10 that creates a PR to keep branch-21.12 up-to-date. If this PR is unable to be immediately merged due to conflicts, it will remain open for the team to manually merge.

Addresses  #7170

Adds 3 pieces of new functionality:

- A `TDIGEST` aggregation which creates a tdigest column (https://arxiv.org/pdf/1902.04023.pdf) from a stream of input scalars.
- A `MERGE_TDIGEST` aggregation which merges multiple tdigest columns into a new one.
- a `percentile_approx` function which performs percentile queries on tdigest data.

Also exposes several ::detail functions (`sort`, `merge`, `slice`) in detail headers.

Ready for review.  I do need to add more tests though.

Authors:
  - https://github.com/nvdbaranec

Approvers:
  - AJ Schmidt (https://github.com/ajschmidt8)
  - Jake Hemstad (https://github.com/jrhemstad)
  - MithunR (https://github.com/mythrocks)
  - Robert Maynard (https://github.com/robertmaynard)

URL: #8983
@GPUtester GPUtester requested review from a team as code owners September 24, 2021 14:40
@GPUtester GPUtester requested review from harrism and vuule September 24, 2021 14:40
@GPUtester GPUtester merged commit 2718443 into branch-21.12 Sep 24, 2021
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SUCCESS - forward-merge complete.

@github-actions github-actions bot added CMake CMake build issue conda libcudf Affects libcudf (C++/CUDA) code. labels Sep 24, 2021
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CMake CMake build issue libcudf Affects libcudf (C++/CUDA) code.
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