purplefox opened a new issue, #35310:
URL: https://github.com/apache/arrow/issues/35310
### Describe the bug, including details regarding any error messages,
version, and platform.
Hi All,
I came across this behaviour when creating a decimal128 from a string:
```
func TestDecFromStringStrangeness(t *testing.T) {
num, err := decimal128.FromString("2112.33", 38, 2)
require.NoError(t, err)
require.Equal(t, decimal128.New(0, 211233), num)
}
```
The value created seems to be out by one on the smallest digit:
```
=== RUN TestDecFromStringBugMaybe
decimal_test.go:54:
Error Trace:
/Users/tfox/Development/tektite/types/decimal_test.go:54
Error: Not equal:
expected: decimal128.Num{lo:0x33921, hi:0}
actual : decimal128.Num{lo:0x33920, hi:0}
Diff:
--- Expected
+++ Actual
@@ -1,3 +1,3 @@
(decimal128.Num) {
- lo: (uint64) 211233,
+ lo: (uint64) 211232,
hi: (int64) 0
Test: TestDecFromStringBugMaybe
--- FAIL: TestDecFromStringBugMaybe (0.00s)
```
### Component(s)
Go
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