SSAS and other cube (MOLAP) tools create persistent cubes as materialized views. Databases that do ROLAP processing create "cubes on the fly" which persist for

SSAS and other cube (MOLAP) tools create persistent cubes as materialized views. Databases that do ROLAP processing create "cubes on the fly" which persist for the duration of the query. If PG adopts a materialized view that supports controlled automatic maintenance, then you'd have something similar to what the MOLAP tools do. Note that MOLAP is a trap of sorts (no pun intended).