In Postgres 10, only range-type partition keys are supported, but PG11 will add hash-type partition keys, as well as a number of other partition improvements.

In Postgres 10, only range-type partition keys are supported, but PG11 will add hash-type partition keys, as well as a number of other partition improvements. https://www.postgresql.org/docs/11/static/ddl-partitioning.html https://www.postgresql.org/docs/11/static/ddl-partitioning.h...