Thanks all! I ended up with this and it worked fine:
std::shared_ptr delta_data =
_arrowBatch->column_data(nAtts);
// COPY delta to pos
std::vector> pos_buffers(2);
pos_buffers[0] = NULL; // No nulls in the array
ASSIGN_OR_THROW(pos_buffers[1],
On Fri, 30 Jul 2021 18:55:33 +0200
Rares Vernica wrote:
> Hello,
>
> I have a RecordBatch that I read from an IPC file. I need to run a
> cumulative sum on one of the int64 arrays in the batch. I tried to do:
The ArrayData contents are semantically immutable. You may want to grab
mutable pointe
IPC reads do not return mutable buffers right now, so
Buffer::mutable_data will return nullptr. You need to use Buffer::Copy
https://github.com/apache/arrow/blob/master/cpp/src/arrow/buffer.h#L251
You could potentially use const_cast to get a mutable pointer to a
buffer returned by IPC reads, whi
Hi Rares,
ArrayData::GetMutableValues would return a nullptr if the requested buffer
is not available.
https://github.com/apache/arrow/blob/557a7c63d49aa04508564517c77c71f3657d19ff/cpp/src/arrow/array/data.h#L199
What does nAtts stand for? could it be that it is OOB?
On Fri, Jul 30, 2021 at 12:5
Hello,
I have a RecordBatch that I read from an IPC file. I need to run a
cumulative sum on one of the int64 arrays in the batch. I tried to do:
std::shared_ptr pos_data = batch->column_data(nAtts);
auto pos_values = pos_data->GetMutableValues(1);
for (auto i = 1; i < pos_data->length; i++)
pos_v
