st_raster is no longer distributed with 10.6, so what happens when upgrading from 10.5? Obviously I can't copy the libst_raster_pg.dll to the database as I used to.
So the question is: how to remove st_raster from our database?
Database is postgresql 9.3, that we need to upgrade to 9.6 before upgrading the geodatabase, to have a supported postgresql.
To upgrade we are going to use pg_upgrade which is the recommended approach instead of a backup/restore.