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https://issues.apache.org/jira/browse/ARROW-17464?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou updated ARROW-17464:
-----------------------------------
Summary: [C++] Support float16 in writing/reading parquet (was: Support
float16 in writing/reading parquet)
> [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++, Python
> Reporter: Anja Boskovic
> Assignee: Anja Boskovic
> Priority: Minor
> Labels: parquet
>
> 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:
> {{{{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")}}}}
>
> {{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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