Renat Valiullin created ARROW-16223:
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Summary: BasicDecimal128::ReduceScaleBy with rounding works
incorrectly
Key: ARROW-16223
URL: https://issues.apache.org/jira/browse/ARROW-16223
Project: Apache Arrow
Issue Type: Bug
Components: C++
Reporter: Renat Valiullin
BasicDecimal128 one(5); // 0.5
one.ReduceScaleBy(1, true); // expected 1, but result is -1
BasicDecimal128 BasicDecimal128::ReduceScaleBy(int32_t reduce_by, bool round)
const {
...
if (result > 0) { // <<< should be >=
result += 1;
} else {
result -= 1;
}
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