Hello! Is there interest in having the float16 logical type standardised in the Parquet spec? I am proposing a PR for Arrow that will write float16 to Parquet as FixedSizeBinary:https://issues.apache.org/jira/browse/ARROW-17464 but for the sake of portability between data analysis tools, it would of course be a lot better to have this type standardised in the format itself.
Previous requests for this have been here: https://issues.apache.org/jira/browse/PARQUET-1647 and here: https://issues.apache.org/jira/browse/PARQUET-758 . With the development of neural networks, half-precision floating points are becoming more popular: https://en.wikipedia.org/wiki/Half-precision_floating-point_format ; I do think that a demand exists for its support. I am new to the project, but am happy to contribute development time if there is support for this feature, and guidance. Warm regards, Anja
