Trying to do incremental refresh on a new Datamart. Setup is refresh period is 10 days, keep data from last 50 years. Datamart create 20 or more SQL queries to my SQL server, getting wrong periods of date (CONTROLE is the key date column). Refresh only if max Controle changed. Datamart had already refreshed first time (has already data inside dataflow):
This happens to all my 30 tables. Refreshing process takes more than hours, and sometimes it fails (error 500). Normaly the same refreh is 30 minutes on my SSAS, full refresh. What I see is that it does a full refresh, at all tables, even if it already has data loaded, after the initial refresh. It happens if I create a new colunm in one table, or change/create an incremental refresh setup. Even doing it to one table, it full refreshes all tables. The dataflow interface on a Datamart is terrible. Each change you do in one table starts a full refresh of the others tables too, even if they have already an incremental refresh setup, and data loaded after a first refresh. And you can't edit other table before this full refresh.
With old dataflow, you can edit everything before starts a refresh, that can be a booked one, other day or hour.
Lost a lot of time and finally quit, transfering to a regular dataflow. I regret to have started a datamart. My intention was to use the SQL capabilities, but forget it, until it is stable I will not try again.