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Posted to jira@arrow.apache.org by "Tor Eivind McKenzie-Syvertsen (Jira)" <ji...@apache.org> on 2021/08/20 12:37:00 UTC
[jira] [Updated] (ARROW-13681) pyarrow.compute.list_parent_indices
only computes for first chunk
[ https://issues.apache.org/jira/browse/ARROW-13681?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tor Eivind McKenzie-Syvertsen updated ARROW-13681:
--------------------------------------------------
Description:
Pyarrow version: 5.0.0.
Python version: 3.7.9
I came across this issue due to very unexpected behaviour from the "explode" function obtained here:
https://issues.apache.org/jira/browse/ARROW-12099
indices = pc.list_parent_indices(table[col_name])
if table[column] in this example contains several chunks, the indices will look perfectly fine for that chunk, but erratic and unexpected results for second chunk.
No warning or info was given either
A workaround that solved the problem for me is:
{code:java}
indices = pc.list_parent_indices(table.combine_chunks()[col_name])
{code}
The behaviour then changes dramatically.
I'm assuming this isnt expected and should be fixed?
was:
I came across this issue due to very unexpected behaviour from the "explode" function obtained here:
https://issues.apache.org/jira/browse/ARROW-12099
indices = pc.list_parent_indices(table[col_name])
if table[column] in this example contains several chunks, the indices will look perfectly fine for that chunk, but erratic and unexpected results for second chunk.
No warning or info was given either
A workaround that solved the problem for me is:
{code:java}
indices = pc.list_parent_indices(table.combine_chunks()[col_name])
{code}
The behaviour then changes dramatically.
I'm assuming this isnt expected and should be fixed?
Summary: pyarrow.compute.list_parent_indices only computes for first chunk (was: pyarow.compute.list_parent_indices only computes for first chunk)
> pyarrow.compute.list_parent_indices only computes for first chunk
> -----------------------------------------------------------------
>
> Key: ARROW-13681
> URL: https://issues.apache.org/jira/browse/ARROW-13681
> Project: Apache Arrow
> Issue Type: Bug
> Reporter: Tor Eivind McKenzie-Syvertsen
> Priority: Major
>
> Pyarrow version: 5.0.0.
> Python version: 3.7.9
> I came across this issue due to very unexpected behaviour from the "explode" function obtained here:
> https://issues.apache.org/jira/browse/ARROW-12099
> indices = pc.list_parent_indices(table[col_name])
> if table[column] in this example contains several chunks, the indices will look perfectly fine for that chunk, but erratic and unexpected results for second chunk.
> No warning or info was given either
> A workaround that solved the problem for me is:
> {code:java}
> indices = pc.list_parent_indices(table.combine_chunks()[col_name])
> {code}
> The behaviour then changes dramatically.
> I'm assuming this isnt expected and should be fixed?
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