Weston Pace created ARROW-14110:
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Summary: [C++] Decimal promotion rules should consider inflating
type
Key: ARROW-14110
URL: https://issues.apache.org/jira/browse/ARROW-14110
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Weston Pace
I'm not sure how strongly I feel about this but, for example:
{code:python}
Decimal(20, 4) / Decimal(20, 4) => Decimal(41, 21)
{code}
Decimal(20, 4) is in range for 128 but Decimal(41, 21) is out of range for 128
(but in range for 256).
Currently calling divide with two 128 bit decimals will fail but it could
promote to a decimal 256.
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