fix(parquet): Handle uint32 to uint64 array widening in reverseTransformArray (#721)

Author: disq

parquet/read.go

@@ -68,6 +68,8 @@ func reverseTransformArray(dt arrow.DataType, arr arrow.Array) arrow.Array {
 		return reverseTransformTime64(dt.(*arrow.Time64Type), arr)
 	case *array.Date32:
 		return reverseTransformFromDate32(dt, arr)
+	case *array.Uint32:
+		return reverseTransformFromUint32(dt, arr)
 	case *array.Struct:
 		dt := dt.(*arrow.StructType)
 		children := make([]arrow.ArrayData, arr.NumField())
@@ -100,6 +102,23 @@ func reverseTransformArray(dt arrow.DataType, arr arrow.Array) arrow.Array {
 	}
 }
 
+func reverseTransformFromUint32(dt arrow.DataType, arr *array.Uint32) arrow.Array {
+	switch dt {
+	case arrow.PrimitiveTypes.Uint64:
+		builder := array.NewUint64Builder(memory.DefaultAllocator)
+		for i := 0; i < arr.Len(); i++ {
+			if arr.IsNull(i) {
+				builder.AppendNull()
+				continue
+			}
+			builder.Append(uint64(arr.Value(i)))
+		}
+		return builder.NewArray()
+	default:
+		panic(fmt.Errorf("unsupported conversion from %s to %s", arr.DataType(), dt))
+	}
+}
+
 func reverseTransformFromString(dt arrow.DataType, arr arrow.Array) arrow.Array {
 	builder := array.NewBuilder(memory.DefaultAllocator, dt)
 	for i := 0; i < arr.Len(); i++ {