[jira] [Issue Comment Deleted] (ARROW-11629) [C++] Writing float32 values makes parquet files not readable for some tools

["Matthias Rosenthaler (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-11629?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matthias Rosenthaler updated ARROW-11629:
-----------------------------------------
    Comment: was deleted

(was: strange thing, switching it off in ParquetSharp didn't have any effect:
{code:java}
var writerProperties = builder.Compression(Compression.Gzip).DisableDictionary("float").Build();
using (var file = new ParquetFileWriter(Path.Combine(dirInfo.FullName, filename + ".parquet"), columns, writerProperties: writerProperties)){code})

> [C++] Writing float32 values makes parquet files not readable for some tools
> ----------------------------------------------------------------------------
>
>                 Key: ARROW-11629
>                 URL: https://issues.apache.org/jira/browse/ARROW-11629
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++, Python
>    Affects Versions: 3.0.0
>            Reporter: Matthias Rosenthaler
>            Priority: Major
>         Attachments: foo.parquet, image-2021-02-15-15-49-41-908.png, output.csv, output.parquet
>
>
> If I try to read the attached csv file with pyarrow, changing the float64 columns to float32 and export it to parquet, the parquet file gets corrupted. It is not readable for apache drill or Parquet.Net any longer.



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