ARROW-13067: [C++][Compute] Implement integer to decimal cast #11045
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LGTM. Thanks for resolving this issue. |
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| options.to_type = decimal256(76, 67); | ||
| CheckCastFails(ArrayFromJSON(int32(), "[0]"), options); | ||
| } |
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Should we file a follow up issue to allow truncation via an unsafe cast in these cases?
| CheckDispatchBest(name, {int64(), decimal128(1, 0)}, | ||
| {decimal128(1, 0), decimal128(1, 0)}); | ||
| CheckDispatchBest(name, {decimal128(1, 0), int64()}, | ||
| {decimal128(1, 0), decimal128(1, 0)}); |
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Hmm, so an int64 is cast to a 1-digit decimal? Unrelated to this PR surely, but I'm a bit surprised :-)
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I think this is testing that given an integer and a decimal, the integer is cast to a decimal of the same width/precision/scale.
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But surely the actual cast from int64 to decimal128(1,0) will fail in the precision check?
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Ah, right. Maybe we want the cast logic to be smarter about that, then. As you said, though, that can be tackled separately.
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Jira issue created
https://issues.apache.org/jira/browse/ARROW-13856
Closes apache#11045 from cyb70289/13067-int2dec Authored-by: Yibo Cai <yibo.cai@arm.com> Signed-off-by: Yibo Cai <yibo.cai@arm.com>
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