Ian Cook created ARROW-14035:
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Summary: [C++][Compute] Implement non-hash count_distinct
aggregate kernel
Key: ARROW-14035
URL: https://issues.apache.org/jira/browse/ARROW-14035
Project: Apache Arrow
Issue Type: New Feature
Components: C++
Reporter: Ian Cook
Fix For: 6.0.0
ARROW-12728 added a {{hash_count_distinct}} hash aggregate kernel, but there is
no non-hash {{count_distinct}} aggregate kernel.
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