report studio to_date

为什么to_date(?Year Covered From?,'YYYY-MM-DD')，还会报UDA-SQL-0219 The function "to_date" is being used for local processing but is not available as a built-in function, or at least one of its parameters is not supported.RSV-SRV-0042 Trace back:RSReportService.cpp(722): QFException: CCL_CAUGHT: RSReportService::process()RSReportServiceMethod.cpp(263): QFException: CCL_RETHROW: RSReportServiceMethod::process(): promptPagingForward_RequestRSASyncExecutionThread.cpp(808): QFException: 这个错？但是在有的query里没有问题。收起