felipecrv commented on code in PR #34079:
URL: https://github.com/apache/arrow/pull/34079#discussion_r1100774478
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go/arrow/scalar/scalar.go:
##########
@@ -664,6 +671,28 @@ func GetScalar(arr arrow.Array, idx int) (Scalar, error) {
return NewTime64Scalar(arr.Value(idx), arr.DataType()), nil
case *array.Timestamp:
return NewTimestampScalar(arr.Value(idx), arr.DataType()), nil
+ case *array.RunEndEncoded:
+ physicalIndex := encoded.FindPhysicalIndex(arr.Data(),
arr.Offset()+idx)
+ value, err := GetScalar(arr.Values(), physicalIndex)
+ if err != nil {
+ return nil, err
+ }
+
+ var runLength int64
+
+ runEnds := arr.RunEndsArr()
+ switch ends := runEnds.(type) {
+ case *array.Int16:
+ runLength = int64(ends.Value(physicalIndex))
+ case *array.Int32:
+ runLength = int64(ends.Value(physicalIndex))
+ case *array.Int64:
+ runLength = int64(ends.Value(physicalIndex))
+ }
Review Comment:
@zeroshade Antoine has suggested that I add a RunEndEncoded scalar type
instead of adding hacks to make things work without it.
> To me, this scalar makes sense as representing the physical value for a
physical index, but not the logical value for a logical index (if that
makes...logical sense?)
If you look at the REE array as an array of runs, the scalar that is typed
by the REE type is a single run.
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