I don't know the support for the compression codecs in Javascript, but i don't think anyone has attempted to implement them.
I couldn't find the compression feature listed on the library status docs [1]. But we should add a line item for it. Today, I think only C++ (and libraries that bind to it) have compression implemented. I think a new PR for java was just opened in the last few days. [1] https://arrow.apache.org/docs/status.html On Thu, Dec 17, 2020 at 10:10 AM Andrew Clancy <[email protected]> wrote: > So, I figured out the issue here - I had to remove compression from the > pyarrow feather.write_feather(compression='uncompressed'). Is there any > way to read a compressed feather file in arrow js? > See the comment under the first answer here: > https://stackoverflow.com/questions/64629670/how-to-write-a-pandas-dataframe-to-arrow-file/64648955#64648955 > I couldn't find anything in the arrow docs or notebooks on this - I'm > assuming that's related to javascript compression libraries being so > limited. > > > On Mon, 14 Dec 2020 at 21:32, Andrew Clancy <[email protected]> wrote: > >> Hi all, >> >> I have a simple feather file created via a pandas to_feather with a >> datetime64[ns] column, and cannot get timestamps in javascript >> [email protected] >> >> See this notebook: >> https://observablehq.com/@nite/apache-arrow-timestamp-investigation >> >> I'm guessing I'm missing something, has anyone got any suggestions, or >> decent examples of reading a file created in pandas? I've seen in examples >> of [email protected] where dates stored as an array of 2 ints. >> >> File was created with: >> >> import pandas as pd >> pd.read_parquet('sample.parquet') >> df.to_feather('sample-seconds.feather') >> >> Final Q: I'm assuming this is the best place for this question? Happy to >> post elsewhere if there's any other forums, or if this should be a JIRA >> ticket? >> >> Thanks! >> Andy >> >
