I have a (semi) basic data cube set up with a cascading parameters of State and Area. The state select box is straight forward as is the Area; when a user selects a State, the Area options are set accordingly. However, the value for Area is a long list of strings that will be sent to the mysql select statement which will use both params (State & the list of strings from Area) several time. Its a big ugly collection of UNIONS. My problem is somewhere between the before Start and query time.
//beforeOpen script...LState & LAreas the name of the report param
this.queryText = this.queryText.replace('stateList', params["LStates"].value);
this.queryText = this.queryText.replace('areaList', params["LAreas"].value);
In my mysql statement I use them in the following way:
SELECT ..XXX..
FROM ..XXX..
WHERE ..XXX..
State.State_Location in ('stateList')
AND Range_Locator.Range in ('areaList')
UNION ALL
SELECT ..XXX..
FROM ..XXX..
WHERE ..XXX..
State.State_Location in ('stateList')
AND Range_Locator.Range in ('areaList')
The two errors I get from BIRT are:
(Pretty obvious)
Cannot get the result set. org.eclipse....SQL statement doesn ot return a ResultSet object.
(Not so obvious to me)
A BIRT exception occured. Error evaluating Javascript expression. Script engine error: Can't find method java.lang.String.replace(string.java.lang.Object[]).
There are error evaluating script "this.queryText = this.queryText.replace('stateList', params["LStates"].value);this.queryText = this.queryText.replace('areaList', params["LAreas"].value);"
Any ideas? Any help would be greatly appreciated.
It seems LStates is defined as a "multi-value" parameter, therefore params["LStates"].value returns an array of values: this is why this replace method does not work.
You should try like this:
this.queryText = this.queryText.replace('stateList', params["LStates"].value.join("','"));
I am not exactly sure what you are doing in beforeOpen script, but your SQL is looking for the string values 'stateList' & 'areaList' and is probably not happy about the (). You need to use question marks to call the parameters you define in the 'parameters' you set up in the data set design.
SELECT ..XXX..
FROM ..XXX..
WHERE ..XXX..
State.State_Location in ?
AND Range_Locator.Range in ?
UNION ALL
SELECT ..XXX..
FROM ..XXX..
WHERE ..XXX..
State.State_Location in ?
AND Range_Locator.Range in ?
I don't recall using
in ?
In any queries, I usually try and set it to use
like ?
There are number of issues in sending multiple choice parameters to SQL via BIRT. you might want to look at How do I set a parameter to a list of values in a BIRT report? There are also some security concerns. When I have to filter on multiples, I usually do it in a filter (data set design option) after the SQL has run. Thought this can be a resource problem if your SQL returns lots of values.
Thanks for the replies but since I was unable to get these options to work, I wound up restructuring the database & sql statements to run better. To address some previous suggestions:
#dom the states parameter has only one value and while using "IN ('stateList')" is not efficient (disclaimer, not my code) adding the .join(',') did throw an error specific to that; I tried and mysql/BIRT seemed to be expecting a comma separated list but got a string with a trailing comma.
#James I tried using the question mark (?) instead of the 'stateList' & 'areaList' but I think mysql/BIRT was not able to recognize which value went with which question mark...not too sure though since I was not able to debug well enough and find out exactly why. Could be a form to param mapping issue that I didn't notice. Thanks for the help.
Related
new to this world so looking for help with what I think wold be a simple thing to fix, however me and the guy who is training me on all that is SQL and SSRS cannot figure this out
I have a report within SSRS and SQL which is working perfectly bar one thing
I have a drop down list parameter which has all our customers names, and the report shows volumes of what that customer has obtained so far etc, and for an individual customer, this works perfectly. However, when trying to see the total volumes by choosing 'Any' from the drop down list, it returns no data, rather than returning everything
Can anyone please advise what I could be missing here, or what I need to show you to help resolve this issue
Cheers
Liam
Assuming you Stored Proc parameter is varchar and represents either customer names or an 'Any' value then the following should work.
SELECT myField1, myField2 -- etc
FROM myTable t
WHERE (t.ClientName = #myParameterName OR #myParameterName = 'Any')
Optionally Please Note: Personally I don't use SPs and usually just put the code to grab the data in the dataset. Some companies don't like you doing this but if you are able to do this I think this makes life easier.
If you can put the stored proc code directly in your dataset query then you can make the report more flexible. You can change your parameter to be MultiValue, you don't need and 'Any' value added to your parameter list either and then you can simply do something like
SELECT myField1, myField2 -- etc
FROM myTable t
WHERE t.ClientName IN(#myParameterName)
SSRS will take all the selected parameter values and inject them into the dataset query correctly, so there is nothing else you need to do. SSRS will also add a 'Select All' option to your parameter in case you want to gran data for everything. The report will work for 1, 2, 10 or all client names.
I have a query that looks like this:
select * from foo where id in (:ids)
where the id column is a number.
When running this in TOAD version 11.0.0.116, I want to supply a list of ids so that the resulting query is:
select * from foo where id in (1,2,3)
The simple minded approach below gives an error that 1,2,3 is not a valid floating point value. Is there a type/value combination that will let me run the desired query?
CLARIFICATION: the query as shown is how it appears in my code, and I am pasting it into TOAD for testing the results of the query with various values. To date I have simply done a text replacement of the bind variable in TOAD with the comma separated list, and this works fine but is a bit annoying for trying different lists of values. Additionally, I have several queries of this form that I test in this way, so I was looking for a less pedestrian way to enter a list of values in TOAD without modifying the query. If this is not possible, I will continue with the pedestrian approach.
As indicated by OldProgrammer, the Gerrat's answer that "You can't use comma-separated values in one bind variable" in the indicated thread correctly answers this question as well.
I was supposed to use MultiSelect List Box (Dynamic one) where user can select multiple value (by holding Ctrl key) to see the report.
So while implementing I tried to fetch param value at BeforeOpen method and pass it to DataSet ,append it to where clause using IN operator.I got SQL error on screen. So when I print param value it was something like [Ljava.lang.Object;#26ba26ba] causing error in query. I thought I can't process that multiselect param value in script and pass it to query. So dropped that Idea.
Now I am using BIRT's inbuilt Filter functionality in Data set. What I was doing in SQL using script at Beforeopen Method now i am doing the same in dataset Filter. I used row["dataColumn"]IN param["param"].value and it is working fine. I am able to select one or multiple value from filter screen , execute report and getting proper result.
Now one more thing I need to implement is There should be Select All in filter list box so that instead of selecting any other value user can just select Select All and bring the report for all data. I am passing '%' against Select All. Since I am using IN operator so I am not able to get any data on Report.
I want to provide Select All functionality along with multiselection but not able to do that for above limitations . Alternatively I can use Ctrl+A to select all and it is working also I can do that but this is as per requirement that I need to implement.
I am using BIRT version="3.2.17"
ANY IDEA WILL BE APPRECIATED..Thanks In Advance..:)
Are you able to add a "Select All" option to your parameter choices? I have done this using a union with my parameter query and just adding a 'Select All' to my query results.
Normally what I'll do is add something to my query that will let me easily replace the parameters. Something like:
SELECT myStuff
FROM myTables
/**where**/
You can then modify your DataSet query in your beforeOpen statement.
Something along the lines of:
if(params["myParam"]!='Select All'){
this.queryText=this.queryText.replace("/**where**/","WHERE myStuff IN ('" + params["myParams"].join("','") + "')");
}
This is obviously very simplified, but you should be able to use some form of it to allow what you are asking.
We have a database with some fields that are varchar(max) which could contain lots of text however I have a situation where I only want to select the first for example 300 characters from the field for a paginated table of results on a MVC web site for a "preview" of the field.
for a simplified example query where I want to get all locations to display in the table
(this would be paginated, so I don't just get everything - I get maybe 10 results at a time):
return db.locations;
However this gives me a location object with all the fields containing the massive amounts of text which is very time consuming to execute.
So what I resorted to before was using SQL stored procedures with the:
LEFT(field, 300)
to resolve this issue and then in the Linq to SQL .dbml file included the stored procedure to return a "location" object for the result.
However I have many queries and I don't want to have to do this for every query.
This maybe a simple solution, but I am not sure how I can phrase this on a search engine, I would appreciate anyone who can help me with this problem.
You can use functions that directly translate to those functions too, this is useful when you need to translate code that functionally works just fine in SQL at no risk in LINQ.
Have a look at System.Data.Objects.EntityFunctions
Locations.Select(loc=>System.Data.Objects.EntityFunctions.Left(loc.Field,300))
This will get directly translated into a LEFT on the server side.
EDIT: I misread LEFT for LTRIM. Here's all the String functions that can't be used in LINQ to SQL. Have you tried String.Substring()?
Your best option is to map the stored procedure and continue using it. Here is an excellent article with screen shots showing you how to do so.
If you're not using the designer tool you can also call ExecuteCommand against the DataContext. It isn't pretty, but it's what we have for now.
I found something like this worked for me:
return from locationPart in db.locations
select new LocationPart
{
Description = locationPart.description,
Text = locationPart.text.Substring(0,300)
};
Not ideal because I have to use "select new" to return a a different object, but it seems to work.
We need to return subset of records and for that we use the following command:
using (SqlCommand command = new SqlCommand(
"SELECT ID, Name, Flag, IsDefault FROM (SELECT ROW_NUMBER() OVER (ORDER BY #OrderBy DESC) as Row, ID, Name, Flag, IsDefault FROM dbo.Languages) results WHERE Row BETWEEN ((#Page - 1) * #ItemsPerPage + 1) AND (#Page * #ItemsPerPage)",
connection))
I set a SqlCacheDependency declared like this:
SqlCacheDependency cacheDependency = new SqlCacheDependency(command);
But immediately after I run the command.ExecuteReader() instruction, the hasChanged base property of the SqlCacheDependency object becomes true although I did not change the result of the query in any way! And, because of this, the result of this query is not kept in cache.
HttpRuntime.Cache.Insert( cacheKey, list, cacheDependency, Cache.NoAbsoluteExpiration, TimeSpan.FromMinutes(AppConfiguration.CacheExpiration.VeryLowActivity));
Is it because the command has 2 SELECT statements? Is it ROW_NUMBER()? If yes, is there any other way to paginate results?
Please help! After too many hours, a little will be greatly appreciated! Thank you
Running into the same issue and finding the same answers online without any help, I was reasearching the xml invalid subsicription response from profiler.
I found an example on msdn support site that had a slightly different order of code. When I tried it I realized the problem - Don't open your connection object until after you've created the command object and the cache dependency object. Here is the order you must follow and all will be good:
Be sure to enable notifications (SqlCahceDependencyAdmin) and run SqlDependency.Start first
Create the connection object
Create the command object and assign command text, type, and connection object (any combination of constructors, setting properties, or using CreateCommand).
Create the sql cache dependency object
Open the connection object
Execute the query
Add item to cache using dependency.
If you follow this order, and follow all other requirements on your select statement, don't have any permissions issues, this will work!
I believe the issue has to do with how the .NET framework manages the connection, specifically what settings are set. I tried overriding this in my sql command test but it never worked. This is only a guess - what I do know is changing the order immediately solved the issue.
I was able to piece it together from the following to msdn posts.
This post was one of the more common causes of the invalid subscription, and shows how the .Net client sets the properties that are in contrast to what notification requires.
https://social.msdn.microsoft.com/Forums/en-US/cf3853f3-0ea1-41b9-987e-9922e5766066/changing-default-set-options-forced-by-net?forum=adodotnetdataproviders
Then this post was from a user who, like me, had reduced his code to the simplest format. My original code pattern was similar to his.
https://social.technet.microsoft.com/Forums/windows/en-US/5a29d49b-8c2c-4fe8-b8de-d632a3f60f68/subscriptions-always-invalid-usual-suspects-checked-no-joy?forum=sqlservicebroker
Then I found this post, also a very simple reduction of the problem, only his was a simple issue - needing 2 part name for tables. In his case the suggestion resolved the issue. After looking at his code I noticed the main difference was waiting to open the connection object until AFTER the command object AND the dependency object were created. My only assumption is under the hood (I have not yet started reflector to check so only an assumption) the Connection object is opened differently, or order of events and command happen differently, because of this association.
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/bc9ca094-a989-4403-82c6-7f608ed462ce/sql-server-not-creating-subscription-for-simple-select-query-when-using-sqlcachedependency?forum=sqlservicebroker
I hope this helps someone else in a similar issue.
Just a guess, but could it be because your SELECT statement doesn't have an ORDER BY clause?
If you don't specify an explicit ordering then it's possible for the query to return the results in any order each time it is run. Maybe this is causing the SqlCacheDependency object to think that the results have changed.
Try adding an ORDER BY clause:
SELECT ID, Name, Flag, IsDefault
FROM
(
SELECT ROW_NUMBER() OVER (ORDER BY #OrderBy DESC) AS Row,
ID, Name, Flag, IsDefault
FROM dbo.Languages
) AS results
WHERE Row BETWEEN ((#Page - 1) * #ItemsPerPage + 1) AND (#Page * #ItemsPerPage)
ORDER BY Row
i'm no expert on SqlCacheDependency, in fact, i found this question whilst looking for answers to my own issues with it! However, i believe the reason your SqlCacheDependency is not working is because your SQL contains a nested sub query.
Take a look at the documentation which lists what you can/can not use in your SQL: Creating a Query for Notification
"....The statement must not contain subqueries, outer joins, or self-joins....."
I also found some invaluable troubleshooting info from a guy at Redgate here: Using and Monitoring SQL 2005 Query Notification that helped me solve my own problem: By using Sql Profiler to trace the QN events he suggests, i was able to spot my connection was incorrectly using the 'SET ARITHABORT OFF' option, causing my notifications to fail.