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https://issues.apache.org/jira/browse/ARROW-17360?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joris Van den Bossche resolved ARROW-17360.
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Fix Version/s: 11.0.0
Resolution: Fixed
Issue resolved by pull request 14528
[https://github.com/apache/arrow/pull/14528]
> [Python] Order of columns in pyarrow.feather.read_table
> -------------------------------------------------------
>
> Key: ARROW-17360
> URL: https://issues.apache.org/jira/browse/ARROW-17360
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Python
> Affects Versions: 8.0.1
> Reporter: Matthew Roeschke
> Assignee: Alenka Frim
> Priority: Major
> Labels: orc, pull-request-available
> Fix For: 11.0.0
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> xref [https://github.com/pandas-dev/pandas/issues/47944]
>
> {code:java}
> In [1]: df = pd.DataFrame({"a": [1, 2, 3], "b": ["a", "b", "c"]})
> # pandas main branch / 1.5
> In [2]: df.to_orc("abc")
> In [3]: pd.read_orc("abc", columns=['b', 'a'])
> Out[3]:
> a b
> 0 1 a
> 1 2 b
> 2 3 c
> In [4]: import pyarrow.orc as orc
> In [5]: orc_file = orc.ORCFile("abc")
> # reordered to a, b
> In [6]: orc_file.read(columns=['b', 'a']).to_pandas()
> Out[6]:
> a b
> 0 1 a
> 1 2 b
> 2 3 c
> # reordered to a, b
> In [7]: orc_file.read(columns=['b', 'a'])
> Out[7]:
> pyarrow.Table
> a: int64
> b: string
> ----
> a: [[1,2,3]]
> b: [["a","b","c"]] {code}
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