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Kirill Lykov commented on ARROW-12513:
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Thanks for detailed explanation, I didn't get that there
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Kirill Lykov reassigned ARROW-12513:
Assignee: (was: Kirill Lykov)
> [C++][Parquet] Parquet Writer always puts
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Kirill Lykov updated ARROW-12513:
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Comment: was deleted
(was: Most probably something wrong happens here --
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Kirill Lykov edited comment on ARROW-12513 at 7/8/21, 3:30 PM:
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Looks like
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Kirill Lykov edited comment on ARROW-12513 at 7/8/21, 3:28 PM:
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Looks like
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Kirill Lykov edited comment on ARROW-12513 at 7/8/21, 3:27 PM:
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Looks like
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Kirill Lykov commented on ARROW-12513:
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Looks like there are different call stacks for int32 and
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Kirill Lykov updated ARROW-12513:
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Comment: was deleted
(was: I found why it happens.
Here we return without passing null_count to
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Kirill Lykov commented on ARROW-12513:
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I found why it happens.
Here we return without passing
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Kirill Lykov edited comment on ARROW-12513 at 7/3/21, 8:58 PM:
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Most
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Kirill Lykov edited comment on ARROW-12513 at 7/3/21, 8:52 PM:
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Most
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Kirill Lykov commented on ARROW-12513:
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Most probably something wrong happens here --
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Kirill Lykov edited comment on ARROW-12513 at 7/2/21, 3:18 PM:
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This
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Kirill Lykov commented on ARROW-12513:
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This problem is only with strings and binarytype. It can be
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Kirill Lykov commented on ARROW-12513:
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I would like to have a look and will try to reproduce in a
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Kirill Lykov reassigned ARROW-12513:
Assignee: Kirill Lykov
> [C++][Parquet] Parquet Writer always puts null_count=0 in
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Kirill Lykov commented on ARROW-11549:
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Looks like PR is ready to be merged, but stale for unknown
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Kirill Lykov commented on ARROW-10899:
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Well, it looks like it is called "wolf sort"
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Kirill Lykov updated ARROW-10899:
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Attachment: uniform_1B_wolf.png
> [C++] Investigate radix sort for integer arrays
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Kirill Lykov edited comment on ARROW-10899 at 6/9/21, 3:39 PM:
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Well, it
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Kirill Lykov edited comment on ARROW-10899 at 6/9/21, 2:56 PM:
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LSD sort
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Kirill Lykov commented on ARROW-10899:
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LSD sort is stable.
Do you want to try with Travis' LSD
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Kirill Lykov reassigned ARROW-10899:
Assignee: (was: Kirill Lykov)
> [C++] Investigate radix sort for integer arrays
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Kirill Lykov edited comment on ARROW-10899 at 6/9/21, 11:31 AM:
I have
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Kirill Lykov edited comment on ARROW-10899 at 6/9/21, 11:24 AM:
I have
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Kirill Lykov commented on ARROW-10899:
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I have to drop this ticket but if someone will take it, I
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Kirill Lykov updated ARROW-10899:
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Attachment: differentdistrib.png
> [C++] Investigate radix sort for integer arrays
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Kirill Lykov edited comment on ARROW-10899 at 5/10/21, 2:08 PM:
I
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Kirill Lykov commented on ARROW-10899:
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I believe that the LSD implementation by Travis is stable
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Kirill Lykov edited comment on ARROW-10899 at 5/9/21, 2:56 PM:
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Do we have
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Kirill Lykov commented on ARROW-10899:
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Do we have some information about distribution of integers?
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Kirill Lykov commented on ARROW-10899:
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Actually, I don't see significant effect of prefetch in my
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Kirill Lykov edited comment on ARROW-10899 at 4/26/21, 6:02 PM:
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Kirill Lykov edited comment on ARROW-10899 at 4/26/21, 5:20 PM:
I'm
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Kirill Lykov edited comment on ARROW-10899 at 4/26/21, 5:18 PM:
I'm
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Kirill Lykov commented on ARROW-10899:
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I'm continuing experiments with MSD sort. Please ignore
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Kirill Lykov edited comment on ARROW-10899 at 4/26/21, 5:17 PM:
I'm
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Kirill Lykov updated ARROW-10899:
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Attachment: all_random_wholeRange.png
> [C++] Investigate radix sort for integer arrays
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Kirill Lykov updated ARROW-10899:
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Attachment: all_random_wholeRange.png
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Kirill Lykov edited comment on ARROW-10899 at 4/19/21, 8:55 AM:
Updates,
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Kirill Lykov commented on ARROW-10899:
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Updates, I've contacted Travis and he wrote that he has a
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Kirill Lykov reassigned ARROW-10899:
Assignee: Kirill Lykov
> [C++] Investigate radix sort for integer arrays
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Kirill Lykov edited comment on ARROW-10899 at 4/12/21, 3:04 PM:
Right, I
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Kirill Lykov commented on ARROW-10899:
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Right, I agree that it is stable.
>From performance
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Kirill Lykov edited comment on ARROW-10899 at 4/11/21, 4:58 PM:
Thanks
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Kirill Lykov edited comment on ARROW-10899 at 4/11/21, 4:47 PM:
Thanks
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Kirill Lykov edited comment on ARROW-10899 at 4/11/21, 4:40 PM:
Thanks
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Kirill Lykov edited comment on ARROW-10899 at 4/11/21, 4:40 PM:
Thanks
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Kirill Lykov edited comment on ARROW-10899 at 4/11/21, 9:41 AM:
Thanks
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Kirill Lykov edited comment on ARROW-10899 at 4/11/21, 9:41 AM:
Thanks
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Kirill Lykov edited comment on ARROW-10899 at 4/11/21, 9:41 AM:
Thanks
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Kirill Lykov edited comment on ARROW-10899 at 4/11/21, 9:33 AM:
Thanks
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Kirill Lykov edited comment on ARROW-10899 at 4/11/21, 9:25 AM:
Thanks
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Kirill Lykov edited comment on ARROW-10899 at 4/11/21, 9:24 AM:
Thanks
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Kirill Lykov commented on ARROW-10899:
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Thanks for the reference to the blog, I read all of his
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Kirill Lykov updated ARROW-10899:
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Attachment: all_random_wholeRange.png
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Kirill Lykov commented on ARROW-10154:
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I couldn't find a separate Jira about C++/Gandiva
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Kirill Lykov reassigned ARROW-10899:
Assignee: (was: Kirill Lykov)
> [C++] Investigate radix sort for integer arrays
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Kirill Lykov commented on ARROW-10899:
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I added a repository to put there some experiments i've
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Kirill Lykov commented on ARROW-10899:
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On a higher level I honestly thought that I will easily
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Kirill Lykov edited comment on ARROW-10899 at 2/10/21, 10:08 AM:
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Right,
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Kirill Lykov commented on ARROW-10899:
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Right, I will check also spinsort from boost
> [C++]
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Kirill Lykov edited comment on ARROW-10899 at 2/9/21, 8:38 PM:
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Your
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Kirill Lykov commented on ARROW-10899:
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Your intuition is correct, at least for int32_t key. I
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Kirill Lykov updated ARROW-10899:
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Attachment: Screen Shot 2021-02-09 at 17.48.13.png
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Kirill Lykov edited comment on ARROW-10899 at 2/9/21, 4:24 PM:
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1. From
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Kirill Lykov edited comment on ARROW-10899 at 2/9/21, 4:23 PM:
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1. From
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Kirill Lykov commented on ARROW-10899:
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1. From the paper "Fast Sort on CPUs and GPUs: A Case for
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Kirill Lykov reassigned ARROW-10899:
Assignee: Kirill Lykov
> [C++] Investigate radix sort for integer arrays
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Kirill Lykov commented on ARROW-10899:
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Thanks for the clarification, I will check it out next
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Kirill Lykov commented on ARROW-10899:
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Sounds interesting to me, I would like to have a look.
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Kirill Lykov commented on ARROW-4631:
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Do we still need this feature? It sounds like an interesting
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Kirill Lykov commented on ARROW-10578:
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will post PR soon
> [C++] Comparison kernels crashing for
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Kirill Lykov updated ARROW-10578:
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Description:
Comparing a string array with a string scalar works:
{code:java}
In [1]: import
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Kirill Lykov reassigned ARROW-10578:
Assignee: Kirill Lykov
> [C++] Comparison kernels crashing for string array with null
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Kirill Lykov commented on ARROW-10578:
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Problem is still reproducible. It happens only for
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Kirill Lykov commented on ARROW-10605:
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I might be interested in helping with it, but I need more
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Kirill Lykov commented on ARROW-10197:
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Would be nice to add a reviewer for this PR.
>
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Kirill Lykov commented on ARROW-10197:
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To simplify navigation, PR is there
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Kirill Lykov edited comment on ARROW-10197 at 10/12/20, 1:08 PM:
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I
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Kirill Lykov commented on ARROW-10197:
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I solved it, so will prepare a PR soon. Could you assign
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Kirill Lykov commented on ARROW-10197:
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Looks like I will soon manage to fix the thing but I can
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Kirill Lykov updated ARROW-10197:
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Comment: was deleted
(was: I fix that and I see the code compiling but I get problems runtime:
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Kirill Lykov edited comment on ARROW-10197 at 10/7/20, 1:22 PM:
I fix
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Kirill Lykov edited comment on ARROW-10197 at 10/7/20, 1:06 PM:
I fix
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Kirill Lykov commented on ARROW-10197:
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Yeah, I found it and looks like fixed. Now I need to do a
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Kirill Lykov updated ARROW-10197:
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Description:
Looks like there is no way to execute an expression on filtered data in python.
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Kirill Lykov updated ARROW-10197:
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Description:
Looks like there is no way to execute an expression on filtered data in python.
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https://issues.apache.org/jira/browse/ARROW-10197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17208803#comment-17208803
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Kirill Lykov commented on ARROW-10197:
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I've tried to fix it by adding
```python
def
Kirill Lykov created ARROW-10197:
Summary: [Gandiva][python] Execute expression on filtered data
Key: ARROW-10197
URL: https://issues.apache.org/jira/browse/ARROW-10197
Project: Apache Arrow
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