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Having a custom ODA (I guess this is true for regular JDBC when calling stored procedures as well) we have an option to get parameters meta-data from the underlying data provider and add those as data set parameters. In order to pass run-time values the only option is to have those defined as report parameters and link the data set ones to the corresponding report parameters. To do this manually when the parameters list is considerably long is a real pain, accessing design engine from ODA layer is not possible but we could extend the data set UI by adding a button or something on the parameters page to copy all data set defined parameters to the report level and link them together, this will save a lot of time and makes the process less error prone. I did implemented that as a menu contribution to the data explorer for data set objects and it's really not a big deal (once I've found the registered menu id looking up into the source code)... thought it could make an useful enhancement if added as a core functionality.