While not 'vanilla' Postgres, this appears to be packaged reasonably as a PG extension. Since no vanilla PG code was changed, you should be able to upgrade PG w

While not 'vanilla' Postgres, this appears to be packaged reasonably as a PG extension. Since no vanilla PG code was changed, you should be able to upgrade PG without worry. PG 9.5 introduces some support for parallelization along with custom scans. So this capability seems like a natural fit. As for utility, big data queries tend to do heavy aggregations, and parallelization is a nice performance enhancement where it could be sorely needed. Redshift has good name recognition, but under the covers, it's ParAccel, which started with an early (8.2?) version of Postgres and modified it.