Thanks for you Reply Visvash.
You assumed it correctly.
My requirement is that on selecting AssetId from first parameter and Worker(by Code) from 2nd parameter the report should display the selected worker details as defined in the AOT query like personnelnumber,position,department.
thats why i want to use AOT query rather than QuerybuildDatasoure.
just need to put the write code in prcessReport.
you can ask if still not clear. :)
thanks