I am useing oracle as Database, Once I clicked user menu item , I got the following error Exception occurred in action '[RetrieveAction:: Context:Context::[Session [5437686f-e448-4920-8203-28c788eb831d]] xpath://System.User should retrieve count:true retrieval schema:jG@4b7b1]', all database changes executed by this action were rolled back Stack trace There's a column which does not have an alias. Probably it's an aggregate or another function. Specify an alias for this select column. at at.a(SourceFile:1508)