Cascading question - Can dataSource be replaced

[Richard]

Suppose DDL1 has items A, B, C coming from query SELECT tablename as item from tablenames
When DDL1 is changed I want DDL2 to get items from appropriate table using query SELECT item from {DDL1.value()}

In the change handler for DDL1 the following does not work.

DDL2.enable(true);
DDL2.dataSource = new kendoDataSource (...);