If you need to get all SSRS that has a Subscription.
SELECT SubscriptionOwner = u.UserName
,s.ModifiedDate
,s.[Description]
,s.EventType
,s.DeliveryExtension
,s.LastStatus
,s.LastRunTime
,sch.NextRunTime
,ScheduleName = sch.Name
,ReportName = c.Name
,ReportPath = c.[Path]
,ReportDescription = c.[Description]
FROM ReportServer.dbo.Subscriptions AS s
INNER JOIN ReportServer.dbo.Users AS u ON s.OwnerID = u.UserID
INNER JOIN ReportServer.dbo.[Catalog] AS c ON s.Report_OID = c.ItemID
INNER JOIN ReportServer.dbo.ReportSchedule AS rs ON s.Report_OID = rs.ReportID
AND s.SubscriptionID = rs.SubscriptionID
INNER JOIN ReportServer.dbo.Schedule AS sch ON rs.ScheduleID = sch.ScheduleID
ORDER BY u.UserName
,c.[Path];
afterowl 