Support for IntelliJ clients (datagrip/pycharm)

**Is your feature request related to a problem? Please describe.**
Hello, in my workflow I'm using DataGrip for testing queries. I was able to connect to cube postgres database via datagrip, however [database/schema introspection](https://www.jetbrains.com/help/datagrip/schemas.html#objects-from-system-catalogs-in-coding-assistance) is always ending with an error:

`org.postgresql.util.PSQLException: ERROR: Initial planning error: Error during planning: Coercion from [Utf8, Timestamp(Nanosecond, Some("UTC"))] to the signature OneOf([Exact([Utf8, Date32]), `...]) failed. QUERY: SELECT round(EXTRACT(EPOCH FROM pg_postmaster_start_time() AT TIME ZONE 'UTC')) AS startup_time.`

**Describe the solution you'd like**
I'd like to have support for DataGrip or whole IntelliJ ecosystem, where introspection would end up successfully and features like whisperer would suggest objects from cube database.