Timing. Postgres 9.5 was not on the horizon when we were building out our solution. Lacking OLAP support, the query complexity to achieve similar functionality

Timing. Postgres 9.5 was not on the horizon when we were building out our solution. Lacking OLAP support, the query complexity to achieve similar functionality would have been very cumbersome, error-prone, and non-performant (excessive use of unions, massive case clauses, lots of repetition, inscrutable window functions - a mess). Further, our finance team later insisted on using Oracle EssBase, where Postgres in any version will never be an option.