Hi, I'm developing an adapter with JOIN push-down.
I'm generating *DataContext* object with *implementor.getRootExpression()* in my implementation of *EnumerableRel.implement(EnumerableRelImplementor implementor, Prefer pref)* During the query execution phase it contains a map of dynamic variables with names like '?0', '?1', '?2', ... The problem is that I cannot distinguish which parameters should go on the left and which should go on the right hand sides of the join expression, so I can use them to propagate to my underlying data storage. Example, SELECT e.name, e.id FROM Employee e JOIN Department d ON e.departmentId = d.id WHERE d.id = ? AND e.name = ? In DataContext I'm getting ?0 = '99' ?1 = 'Adams' I cannot infer that '99' should be bound to Department table and 'Adams' to Employee table. Any ideas? -- Oleksiy
