On 6/30/23 04:21, Bechir Ben Daadouch wrote:
> Dear Apache Arrow Dev Community,
>
> My name is Bechir, I am currently working on a project that involves
> implementing graph algorithms in Apache Arrow.
>
> The initial plan was to construct a node structure and a subsequent graph
> that would
Is your use case to operate on a batch of graphs? For example, do you have
hundreds or thousands of graphs that you need to run these algorithms on at
once?
Or is your use case to operate on a single large graph? If it's the
single-graph case then how many nodes do you have?
If it's one graph
+1 (non-binding)
Thanks,
Gang
On Thu, Jun 29, 2023 at 3:35 AM Benjamin Kietzman
wrote:
> Hello,
>
> I'd like to propose adding Utf8View arrays to the arrow format.
> Previous discussion in [1], columnar format description in [2],
> flatbuffers changes in [3].
>
> There are implementations
Dear Apache Arrow Dev Community,
My name is Bechir, I am currently working on a project that involves
implementing graph algorithms in Apache Arrow.
The initial plan was to construct a node structure and a subsequent graph
that would encompass all the nodes. However, I quickly realized that due
We do this quite a bit in the Arrow<->Parquet bridge if IIUC. There are
macros defined like this:
```
#define BEGIN_PARQUET_CATCH_EXCEPTIONS try {
#define END_PARQUET_CATCH_EXCEPTIONS \
}\
catch (const
>> 2. For StringView and ArrayView, if the parent has `validity = false`.
>> If they have `validity = true`, there offset might point to a
invalid
>> position
>I have no idea, but I hope not. Ben Kietzman might want to answer more
>precisely here.
I think, for view arrays, the offsets
Thanks Antoine - the examples are useful - I can use the same pattern for
now. Thanks for the quick response!
On Thu, Jun 29, 2023 at 10:47 AM Antoine Pitrou wrote:
>
> Hi Li,
>
> There is not currently, but it would probably be a useful small utility.
> If you look for `std::exception` in the
Hi Li,
There is not currently, but it would probably be a useful small utility.
If you look for `std::exception` in the codebase, you'll find that there
a couple of places where we turn it into a Status already.
Regards
Antoine.
Le 29/06/2023 à 16:20, Li Jin a écrit :
Hi,
IIUC, most of
Hi,
IIUC, most of the Arrow C++ code doesn't not use exceptions. My question is
are there some Arrow utility / macro that wrap the function/code that might
raise an exception and turn that into code that returns an arrow error
Status?
Thanks!
Li
Le 29/06/2023 à 15:16, wish maple a écrit :
Sorry for being misleading. "valid" offset means that:
1. For Binary Like [1] format, and List formats [2], even if the parent
has `validity = false`. Their offset should be well-defined.
Yes.
2. For StringView and ArrayView, if the parent
Hi,
To answer precisely:
1) The exported record batch will live as long as the Python RecordBatch
object is kept alive. If your script keeps the Python RecordBatch object
alive until the end, then the exported record batch is kept alive until
the end.
2) The rest is standard Python
Sorry for being misleading. "valid" offset means that:
1. For Binary Like [1] format, and List formats [2], even if the parent
has `validity = false`. Their offset should be well-defined.
2. For StringView and ArrayView, if the parent has `validity = false`.
If they have `validity = true`,
Thanks for your explanation, Antoine.
I figured out why I'm facing the memory leak and need to call delete explicit.
my example code may mislead the situation. The key problem is when I
wrap the code of convert java stream to RecordBatchReader, I generate
a child allocator from current context
Le 29/06/2023 à 13:42, wish maple a écrit :
Thanks all!
So, in general:
1. For our Binary Like [1] format, and List formats [2], if the parent is
not valid, the offset should still be valid
What do you call a "valid" offset?
Thanks all!
So, in general:
1. For our Binary Like [1] format, and List formats [2], if the parent is
not valid, the offset should still be valid
2. For the StringView ListView [3] types arrow is currently working on,
if the parent is not valid, the child might has valid content
Am I
Values in the `offsets` Buffer of a ListArray can’t be left undefined
because the length of a valid entry before a NULL entry is the offset
associated with that NULL entry minus the previous offset.
The ListViewArray format I’m working on doesn’t have that restriction
because all the information
Le 29/06/2023 à 09:50, Wenbo Hu a écrit :
Hi,
I'm using Jpype to pass streams between java and python back and forth.
For follow code works fine with its release callback
```python
with child_allocator("test-allocator") as allocator:
r =
1. For weakref types, cython API raise TypeError.
2. All related references need to explicit delete before the allocator close
For following code, works fine.
```
with child_allocator("test-allocator") as allocator:
r = some_package.InMemoryArrowReader.create(allocator)
Hi,
I'm using Jpype to pass streams between java and python back and forth.
For follow code works fine with its release callback
```python
with child_allocator("test-allocator") as allocator:
r = some_package.InMemoryArrowReader.create(allocator)
c_stream =
Le 29/06/2023 à 06:07, Weston Pace a écrit :
When a binary array or a list array element is null the cleanest thing to
do is to set the offsets to be the same. So, for example, given a list
array with 5 elements, if second item is null, the offsets could be 0, 8,
8, 12, 20, 50.
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