Ben Kietzman created ARROW-13451:
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Summary: [C++][Compute] Consider removing ScalarAggregateKernel
Key: ARROW-13451
URL: https://issues.apache.org/jira/browse/ARROW-13451
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Ben Kietzman
Scalar aggregation does not incur large memory overhead for the associated
KernelState objects, so maybe it'd be acceptable to remove explicit scalar
aggregation kernels in favor of reusing grouped aggregation kernels with a
single group. This would decrease our maintenance burden significantly, and if
the benchmarks don't show a regression for single-group aggregation then
there's no reason not to
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