Hi Teddy, Yes UnionListWriter currently doesn't support writing decimals into list vector. Basically we are missing APIs like UnionListWriter.decimal() which will return a DecimalWriter(we already have this) and the latter can be used to write decimals in list. I'd suggest you to go ahead and file a JIRA on https://issues.apache.org/.
Please feel free to take it up if you are interested in contributing to Arrow codebase. Thanks, Siddharth On Tue, Apr 17, 2018 at 8:41 PM, Teddy Choi <tc...@hortonworks.com> wrote: > Hello, all > > I’m new to Apache Arrow, and checking whether it supports most of data > types. It seems like that there’s no implementation for list<decimal> > writer in UnionListWriter yet. Is there other way? > > Thanks. > > Teddy Choi.
