COPY command

Hi @vietj. Is it possible to run a [COPY](https://www.postgresql.org/docs/10/static/sql-copy.html) command through reactive-pg-client? Specifically, to load a CSV of data in what I believe is the most efficient way to load a large number of records into the system. I believe the CSV has to either be on the DB server itself (which we'd like to avoid if possible), so can we in some way use the STDIN argument of the COPY command to provide the CSV file over the wire to it?

Thanks!