Hi Sebastian -- Uwe is referring to Parquet files. We don't yet have in-memory RLE or Delta encoding in the Arrow columnar format. I suspect this will eventually be added as it can be quite important to improve in-memory query execution performance.
Wes On Fri, Nov 2, 2018, 2:18 PM Uwe L. Korn <uw...@xhochy.com wrote: > Hello Sebastian, > > currently you can only switch between plain and > dictionary-encoding-combined-with-run-length encoding using the > `use_dictionary` flag on > https://arrow.apache.org/docs/python/generated/pyarrow.parquet.write_table.html#pyarrow.parquet.write_table > . Other encoding are yet only implemented on the read path, we cannot write > delta encodings yet. > > Uwe > > On Fri, Nov 2, 2018, at 12:53 PM, Sebastian Himberger wrote: > > Hi, > > > > I hope this is the right list. I couldn't find a "users" list on the > > website so please forgive me if I am interrupting here. > > > > I am developing an application using the pyarrow module. By reading > through > > the documents I couldn't find a way to specify an encoding like delta or > > run length to a column. Is this not supported yet or am I missing > something? > > > > Thanks so much, > > Sebastian >
