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https://issues.apache.org/jira/browse/ARROW-17464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17644454#comment-17644454
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Apache Arrow JIRA Bot commented on ARROW-17464:
-----------------------------------------------
This issue was last updated over 90 days ago, which may be an indication it is
no longer being actively worked. To better reflect the current state, the issue
is being unassigned per [project
policy|https://arrow.apache.org/docs/dev/developers/bug_reports.html#issue-assignment].
Please feel free to re-take assignment of the issue if it is being actively
worked, or if you plan to start that work soon.
> [C++] Support float16 in writing/reading parquet
> ------------------------------------------------
>
> Key: ARROW-17464
> URL: https://issues.apache.org/jira/browse/ARROW-17464
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++, Parquet, Python
> Reporter: Anja Boskovic
> Assignee: Anja Boskovic
> Priority: Major
> Labels: parquet, pull-request-available
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> Half-float values are not supported in Parquet. Here is a previous issue that
> talks about that: https://issues.apache.org/jira/browse/PARQUET-1647
> So, this will not work:
> {code:java}
> import pyarrow as pa
> import pyarrow.parquet as pq
> import numpy as np
> arr = pa.array(np.float16([0.1, 2.2, 3]))
> table = pa.table({'a': arr})
> pq.write_table(table, "test_halffloat.parquet") {code}
> {{This is a proposal to store float16 values in Parquet as FixedSizeBinary,
> and then restore them to float16 when reading them back in.}}
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