alamb commented on issue #189: URL: https://github.com/apache/arrow-rs/issues/189#issuecomment-826807736
Comment from Andrew Lamb(alamb) @ 2021-03-08T22:10:56.189+0000: <pre>[~domoritz] I wonder if you mean this reader: https://docs.rs/arrow/3.0.0/arrow/ipc/reader/struct.FileReader.html#method.try_new If so, while it is called a `FileReader` I think that is somewhat misleading. It requires something that implements `std::io::Read` -- which `&[u8]` does. https://doc.rust-lang.org/std/io/trait.Read.html#impl-Read-2</pre> Comment from Dominik Moritz(domoritz) @ 2021-03-09T08:12:41.105+0000: <pre>But {{&[u8]}} does not seem to implement Seek so FileReader does not work. The error is: {{the trait bound `&[u8]: Seek` is not satisfied}} {{ required by `FileReader::<R>::try_new`}} If I switch to the StreamReader, I get an IO error at runtime: {{Io error: failed to fill whole buffer}} So what I implemented was {{let cursor = std::io::Cursor::new(contents);}} {{ let reader = match arrow::ipc::reader::FileReader::try_new(cursor) {}} {{ Ok(reader) => reader,}} {{ Err(error) => return Err(format!("{}", error).into()),}} {{ };}}</pre> -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
