cyb70289 commented on code in PR #14504:
URL: https://github.com/apache/arrow/pull/14504#discussion_r1010004818


##########
go/arrow/csv/reader.go:
##########
@@ -681,6 +691,36 @@ func (r *Reader) parseTime32(field array.Builder, str 
string, unit arrow.TimeUni
        field.(*array.Time32Builder).Append(val)
 }
 
+func (r *Reader) parseDecimal128(field array.Builder, str string, prec, scale 
int32) {
+       if r.isNull(str) {
+               field.AppendNull()
+               return
+       }
+
+       val, err := decimal128.FromString(str, prec, scale)
+       if err != nil && r.err == nil {
+               r.err = err
+               field.AppendNull()
+               return
+       }
+       field.(*array.Decimal128Builder).Append(val)
+}
+
+func (r *Reader) parseDecimal256(field array.Builder, str string, prec, scale 
int32) {
+       if r.isNull(str) {
+               field.AppendNull()
+               return
+       }
+
+       val, err := decimal256.FromString(str, prec, scale)
+       if err != nil && r.err == nil {
+               r.err = err
+               field.AppendNull()
+               return
+       }
+       field.(*array.Decimal256Builder).Append(val)

Review Comment:
   Will it be called if `r.err != nil`?



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