felipecrv commented on code in PR #34079:
URL: https://github.com/apache/arrow/pull/34079#discussion_r1100806001
##########
go/arrow/scalar/scalar.go:
##########
@@ -908,6 +937,51 @@ func MakeArrayFromScalar(sc Scalar, length int, mem
memory.Allocator) (arrow.Arr
data.Release()
}()
return array.MakeFromData(data), nil
+ case *RunEndEncoded:
+ dt := s.DataType().(*arrow.RunEndEncodedType)
+ totalLen := uint64(s.RunLength * int64(length))
+
+ var endBytes []byte
+ switch dt.RunEnds().ID() {
+ case arrow.INT16:
+ if totalLen > math.MaxInt16 {
+ return nil, fmt.Errorf("%w: final length
overflows int16 run ends", arrow.ErrInvalid)
+ }
+
+ v := int16(totalLen)
+ endBytes = (*[2]byte)(unsafe.Pointer(&v))[:]
+ case arrow.INT32:
+ if totalLen > math.MaxInt32 {
+ return nil, fmt.Errorf("%w: final length
overflows int16 run ends", arrow.ErrInvalid)
+ }
+
+ v := int32(totalLen)
+ endBytes = (*[4]byte)(unsafe.Pointer(&v))[:]
+ case arrow.INT64:
+ if totalLen > math.MaxInt64 {
+ return nil, fmt.Errorf("%w: final length
overflows int16 run ends", arrow.ErrInvalid)
+ }
Review Comment:
This check is not needed for int64, right?
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