pitrou commented on a change in pull request #10823:
URL: https://github.com/apache/arrow/pull/10823#discussion_r678899547
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File path: cpp/src/arrow/util/decimal.cc
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@@ -528,8 +528,8 @@ Status Decimal128::FromString(const util::string_view& s,
Decimal128* out,
int32_t parsed_scale = 0;
if (dec.has_exponent) {
auto adjusted_exponent = dec.exponent;
- auto len = static_cast<int32_t>(significant_digits);
- parsed_scale = -adjusted_exponent + len - 1;
+ parsed_scale =
+ -adjusted_exponent +
static_cast<int32_t>(dec.fractional_digits.size());
Review comment:
Precision is computed as the number of significant digits. I think it's
ok (it was also the intent of the code previously).
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