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Posted to user@arrow.apache.org by "Prrix (via GitHub)" <gi...@apache.org> on 2025/04/11 07:24:19 UTC

[D] Aggreagation hash function in arrow cpp [arrow]

GitHub user Prrix created a discussion: Aggreagation hash function in arrow cpp

I am not able to work with the hash function impelmentation , tryna figure out how to groupby and get last values and its indx or something but its not working with syntax errors , can someone help !

GitHub link: https://github.com/apache/arrow/discussions/46107

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Re: [D] Aggreagation hash function in arrow cpp [arrow]

Posted by "drin (via GitHub)" <gi...@apache.org>.

GitHub user drin added a comment to the discussion: Aggreagation hash function in arrow cpp

what have you been trying?

GitHub link: https://github.com/apache/arrow/discussions/46107#discussioncomment-12805420

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Re: [D] Aggreagation hash function in arrow cpp [arrow]

Posted by "zanmato1984 (via GitHub)" <gi...@apache.org>.

GitHub user zanmato1984 added a comment to the discussion: Aggreagation hash function in arrow cpp

Hi @Prrix , it would be helpful if you paste your C++ code and the error message here.

Meanwhile you can refer to the aggregation example code in the source tree: https://github.com/apache/arrow/blob/bf5df5bd6680bf8ec57a56671cc3456014338acb/cpp/examples/arrow/execution_plan_documentation_examples.cc#L456-L480

GitHub link: https://github.com/apache/arrow/discussions/46107#discussioncomment-12806465

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