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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. -- This message was sent by Atlassian Jira (v8.3.4#803005)