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https://issues.apache.org/jira/browse/ARROW-13130?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17421775#comment-17421775
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David Li commented on ARROW-13130:
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I think we can handle most of these by casting to float64 first (if we want, we
could avoid the cast and do the conversion inline instead). abs, round (and
ceil, floor, etc), mode, negate, sign, and tdigest should be handled directly.
> [C++][Compute] Add decimal support for arithmetic compute functions
> -------------------------------------------------------------------
>
> Key: ARROW-13130
> URL: https://issues.apache.org/jira/browse/ARROW-13130
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: yibocai#1
> Assignee: David Li
> Priority: Major
> Labels: kernel
>
> The following arithmetic functions do not support decimal:
> - abs
> - abs_checked
> - acos
> - acos_checked
> - asin
> - asin_checked
> - atan
> - ceil
> - cos
> - cos_checked
> - floor
> - is_finite (?)
> - is_inf (?)
> - is_nan (?)
> - ln
> - ln_checked
> - log1p
> - log1p_checked
> - log2
> - log2_checked
> - logb (float/decimal works int/decimal does not)
> - logb_checked (float/decimal works int/decimal does not)
> - mode
> - negate
> - negate_checked
> - power (float/decimal works int/decimal does not)
> - power_checked (float/decimal works int/decimal does not)
> - quantile
> - round (ARROW-13975)
> - round_to_multiple (ARROW-13975)
> - sign
> - sin
> - sin_checked
> - stddev
> - tan
> - tan_checked
> - tdigest
> - trunc
> - variance
> ? - May not be applicable
> The following kernels arithmetic functions do support decimal inputs
> - add
> - add_checked
> - atan2
> - divide
> - divide_checked
> - equal (ARROW-13966)
> - greater (ARROW-13966)
> - greater_equal (ARROW-13966)
> - less (ARROW-13966)
> - less_equal (ARROW-13966)
> - mean
> - min_max
> - multiply
> - multiply_checked
> - product
> - subtract
> - subtract_checked
> - sum
> - unique
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