I opened https://issues.apache.org/jira/browse/PARQUET-1648 so we don't forget about it
On Mon, Sep 2, 2019 at 10:25 AM <roman.karlstet...@gmail.com> wrote: > > Thanks for the feedback, I'll try to work on this if I find some time. > > Roman > > -----Ursprüngliche Nachricht----- > Von: Wes McKinney <wesmck...@gmail.com> > Gesendet: Montag, 2. September 2019 16:25 > An: dev@arrow.apache.org > Betreff: Re: KeyValue metadata for column > > hi Roman, > > It's just not implemented. See issue related to preserving Field-level Arrow > metadata in Parquet > > https://issues.apache.org/jira/browse/ARROW-4359 > > I think implementing this should be pretty straightforward. You can follow > the code that handles KeyValue metadata at the Schema level > > - Wes > > On Mon, Sep 2, 2019 at 8:05 AM <roman.karlstet...@gmail.com> wrote: > > > > Hi everyone, > > > > > > > > reading the descriptions here > > <https://parquet.apache.org/documentation/latest/#metadata> > > https://parquet.apache.org/documentation/latest/#metadata, I think it > > should be possible in general to add arbitrary key-value metadata to > > any parquet column. Is that correct? > > > > > > > > If yes, in the https://github.com/apache/arrow repository, I do not > > really find that functionality in the API (no such thing as > > KeyValueMetaData or similar in > > ColumnChunkMetaData::ColumnChunkMetaDataImpl), so I guess that it's > > either not yet implemented or I just don't see it. If it's not > > implemented yet, is that something someone not very familiar with the > > code-base like me could implement or does that require a little more > > insight and experience? > > > > > > > > Regards, > > > > Roman > > >
