I have found the solution. May be it will help somebody. In main report created parameter NAME_OF_MY_PARAMETER with type of net.sf.jasperreports.engine.JRDataSource Created scriptlet In scriptlet beforeReportInit() method received value of REPOT_CONNECTION parameter Connection conn = (Connection) this.parametersMap.get("REPORT_CONNECTION").getValue();[/code] Run query which I needed and received result (ArrayList in my cause) Processed result and got ArrayList which I needed (i.e. added additional rows) override setData method in scriptlet public void setData(Map parameters, Map fields, Map variables, JRFillGroup[] groups) { super.setData(parameters, fields, variables, groups); JRFillParameter parameter = (JRFillParameter) parameters.get("NAME_OF_MY_PARAMETER"); parameter.setValue(JRMeasureDataSourceFactory.getDataSource(measures));}[/code] call setData in beforeReportInit method of scriptlet In main report created subreport and as a DataSource of it set parameter NAME_OF_MY_PARAMETER in subreport left its query as empty (or as select 1) added field to subreport which had type and name which I need created chart which I needed
