So, I have my report written and all is well. However now I have deployed to my live environment I have a problem; when the report is initially opened it runs all the dataset queries, as I have a large database the report is taking an age to display.
Is there a way to prevent all queries running when the report is initially opened? Would like to run just a single dataset query the populates my first parameter, so the user can begin to filter the data before selecting "View Report" to run the main dataset query with the parameters applied rather than getting everything the instant the report is opened?
I have tried setting default values in the parameters to reduce the initial data load but this seems to have confused the users, so think a blank report with nothing selected in the parameters to start with would be better.
Thanks
FTD
I assume you have some form of following.
QueryLookupState -- Used to fill dropdownlist etc.
QueryLookupCity -- Used to fill dropdownlist etc.
QueryMain , your main query which uses parameters from above.
You gave default parameters to your report therefore SSRS is using that defaults and running your main query to generate report. Change your main query and default parameters so that your main query bring empty result or main query needs parameters from lookups.
You can look following question and answer for same problem. You need at least one non-default parameter, otherwise SSRS will execute your report when it first opened.
Related
I have filtering implemented at tablix level in an ssrs report.
The tablix is using a dataset which is getting lots of records from database using a stored procedure.
The report has parameters whose values are used to filter the tablix data.
First time when the report executes it gets all the data from stored procedure and bind it to tablix with all the details as parameters default value is set to select all.
I want to know when user enters parameter values and click on view report , does the report executes the procedure again , get the entire set of data and then filter based on input parameters?
Or the ssrs report is smart enough to know that already the data which was fetched the first time will be used to filter the data in the tablix
First let's talk about the difference between query parameters and report filters. Parameters are passed into the query so that it can run faster and return targeted results. Filters are applied after the fact so the full query has to run and then the report has to go through the records and check criteria row-by-row.
In addition to those options, SSRS offers caching. This allows you to save the query results so that the query is only re-run when needed. This is configured on the report server, not in the report properties.
The best optimization will vary by report. As a general rule it's best to pass parameters into the query/procedure and just get the data you need. If that is too slow, let the query get all the data, cache it, and just use filters at the report level.
I have an ssrs report that uses a Shared Dataset to extract a maximum datetime value that I want to use for multiple reports. I have created a shared dataset called MaxSnapshotDateTime.rsd that uses the query:
select max(snapshot_DT) as snapshot_DT from dbo.SystemLog (nolock) where sync= 1
My report dataset Snapshotdatetime uses the shared dataset. And my parameter #snapshotdatetime takes available and default values from the Snapshotdatetime dataset. I want to be able to use this #snapshotdatetime parameter for embedded datasets.
The #snapshotdatetime parameter is the first in the list of parameters. And the Snapshotdatetime dataset is the first in the list of datasets.
When I preview the report in SSDT it displays correctly initially. But once I select View Report the snapshotdatetime parameter displays as a dropdown with "Select a Value" as the default value and my snapshot datetime available in the dropdown.
If I set my available values for the parameter to be None then I get different behaviour: the parameter appears correctly but it is not available for other dataset queries.
Unfortunately I don't have sufficient permissions for a trace. And I have been unable to replicate with another source. Can anyone shed some light on what is happening when View Report is being clicked?
I am taking a wild guess here, but I have faced such issue before and have done lot of head-scratching. Turns out there is a rdl.data file in the solution where the rdl file resides(and it gets created automatically). This is the cache file for the report. When you "Preview" a report, the data and design for the report is fetched from this cache file, not the actual dataset. Hence there are chances it might be stale.
If you really want to see the report's output, instead of previewing it, try running the report from solution. That would be much more reliable.
Hope it helps you.
I have a report that uses parameters. The default parameters are defaulted to contain all available values, so by default the report the contains all possible data.
I want the user to then be able to deselect some of the values in the parameters, and to refresh the charts in the report, so they can drill down to the data that interests them.
But each time the report is refreshed, it runs the query again, slowing down the process.
Is there a way to allow the user to filter the data in the charts, without re-running the query?
I did find this, but it seems that he also didn't get a solution, or I didn't understand how the solution would work.
http://social.msdn.microsoft.com/Forums/en-US/0f905bdb-b8f2-4d9d-ac5b-e85d2f94f0cf/textbox-action-to-filter-existing-dataset-rather-than-rerun-query
To keep the query from running again, two high level steps must happen:
1) Make sure that your filters(parameters) are not included in the query. The query needs to be identical, no matter what the user has selected for a filter. This is done by moving the filters into the report. You can set them up as the filter on the tablix or on the row groups that are displaying the data.
2) Set up caching for the dataset. The easiest way to do this is by pulling the data set out of the report and create a "Shared Dataset." when you upload that to SSRS, define the dataset caching: maybe set it to last an hour. Connect the report to the shared dataset as well.
The full details of this can fill an article, such as http://www.mssqltips.com/sqlservertip/1919/how-to-enable-caching-in-sql-server-reporting-services-ssrs/ (for an old version of SSRS, but these concepts haven't changed much.)
I've been trying to get around this issue, and was hoping someone here might have paced the same problem.
My SSRS report has some default parameters that are set dynamically. What is happening is that when a report page is first opened (these reports are running from a custom web app), the 'main' report sproc is fired once, just to grab those 2-3 dynamic parameters, even though no other data from that sproc is displayed at this time (if this seems like overkill, it is...I inherited these reports from a former coworker who designed them). So, since there are 2-3 dynamic parameters, the report was designed to get these default values from a query. So, by the time the report is finally run by the user, the main sproc (just call it "report_getReportData" for simplicity) will have ran about 3-4 times already before it's ever rendered to the page.
What I did was, within the report_getReportData sproc, before doing my select * statement to display all the report data, I created a physical table to hold the 2-3 default values, and I created a new dataset in the report to just run a new sproc that just selects the value from this physical table, nothing else, so the result is the getReportData sproc only fires once, and my new sproc, let's call it 'report_getTwoParameters' fires once for each parameter, but the time cost is negligible since is just does one quick select statement.
This solved the issue of the overall report performance, but since there is now a physical table involved (report_getReportData returns data from a temp table), we face the issue of multiple users not being able to run this report simultaneously. So I guess my post has two questions:
1) Is there even a way to get around the main issue of having the report have to run report_getReportData just to set the 2-3 parameters - like maybe "multicast" the result set returned from the sproc into a couple different datasets or something?
2) If we decide to keep my solution of using the physical table, would anyone have any alternate solutions to this, in order for users to be able to run the report simultaneously but avoid bumping into this same physical table?
Group,
We built a data cube using SSAS and are now building SSRS reports off of that cube. Not sure if anyone has come across this, but when you build the report using the wizard and include parameters all looks fine. However if you are in the report after the wizard is compete, and you decide you want to remove one of the parameters you created it debunks the report and the only way to get it back is to re-create the whole report.
Any way you can remove or add parameters after the initial build without destroying your report?
Thanks in advance for the help! I love this forumn!
I had the same problem and this is how I solved it:
Go to the data report tab.
Expand the Parameter button, Here you get a list of parameters.
Delete the unwanted ones.
If you look at the hidden datasets created for each parameter, each one has a query which depends on some of the other parameters, in a cascading fashion. Unless you delete the very last parameter, the other parameters won't work.
You can fix this by manually editing the parameter dataset queries can updating them not to use the parameter you want to delete.
The main query also uses the parameters in a nested FROM (... (... (... fashion. You need to update that so that it doesn't constrain itself to that parameter. Then there is a parameters button on top of the query builder which allows you to remove the reference to that parameter in the query.
I think if you remove the parameters from the wizard, it should update all the other parameters and the query to work correctly. This is probably the easiest route. All of your report objects should remain functional.