[jira] [Created] (ARROW-17549) unsupported cast from halffloat to utf8

["Joost Hoozemans (Jira)" <ji...@apache.org>]

Joost Hoozemans created ARROW-17549:
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             Summary: unsupported cast from halffloat to utf8
                 Key: ARROW-17549
                 URL: https://issues.apache.org/jira/browse/ARROW-17549
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
    Affects Versions: 7.0.0
            Reporter: Joost Hoozemans


Related to https://issues.apache.org/jira/browse/ARROW-17464 but for CSV.

When writing a table that contains halffloats to CSV:

{{{code:python}}}

import pyarrow as pa
import pyarrow.csv as csv
import numpy as np
t = pa.table(\{'a': [np.float16(1.0),np.float16(2.0)]}, schema=pa.schema([pa.field("a", pa.float16())]))
csv.write_csv(t, "out.csv")

{code}

Output:

pyarrow.lib.ArrowNotImplementedError: Unsupported cast from halffloat to utf8 using function cast_string



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