Hello, My objective is design and build a Data Mart what enable OLAP queries using Open Source tools. I will want know if the solution below is possible and correct or exist a better solution: 1 - The data will be generate to PostgreSQL from a commercial Database by a ETL process. 2 - The Mondrian will be used as the OLAP server. 3 - The JPivot will be used for OLAP navigations and queries. I need know opinions about this approach. I'm don't very experienced in this issue. I thank in advance any suggestions, criticisms and opinions. Regards, Renato Cramer. ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to majordomo@xxxxxxxxxxxxxx)