Hi John,,
First question is regarding the possibility of using filter parameters.
Yes, definitely filters can be used to sort the data as required by you.
For ex: Using where or any other filter supporting sql queries to fetch the data as per your requirements
Sample queries can be found in the below attached PDF
Questions 2 and 3:
2.It is not possible to call stored procedures and sql functions from the reports.
The query used in the reports needs to begin with select statement.Otherwise it throws up an error mentioning "HSQL query must begin with SELECT".
More specific details on custom reports can be found from here (link to docops content of CA SCM Harvest documentation)
Please do let us know if this answers your questions.
Regards,
Balakrishna.