lidavidm commented on code in PR #33951:
URL: https://github.com/apache/arrow/pull/33951#discussion_r1092421181
##########
go/arrow/cdata/cdata_exports.go:
##########
@@ -385,7 +390,13 @@ func exportArray(arr arrow.Array, out *CArrowArray,
outSchema *CArrowSchema) {
for i := range bufs {
buf := bufs[i]
if buf == nil || buf.Len() == 0 {
- buffers[i] = nil
+ if i > 0 ||
!internal.HasValidityBitmap(arr.DataType().ID(), flatbuf.MetadataVersionV5) {
+ // apache/arrow#33936: export a dummy
buffer to be friendly to
+ // implementations that don't import
NULL properly
+ buffers[i] =
(*C.void)(unsafe.Pointer(&C.kGoCdataZeroRegion))
+ } else {
+ buffers[i] = nil
+ }
Review Comment:
The C++ side fix isn't even shipping until Arrow 12
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