Deploying CLR Sps Or Functions Which Call A Web Service To A Production Server
Aug 30, 2006
Dear fellow developers,
I have successfully developed a Transact-SQL stored procedure which calls a CLR function, which calls a web service. I am using a Visual Studio 2005 SQL Server Project to perform the necessary magic.
Is there a neat way to deploy this stuff to a production server?
It is bad enough deploying the sp and function, but the web server proxy also needs to be changed to refer to the production web service.
This all looks very nasty and complicated.
Am I missing something?
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May 9, 2007
hello experts,
i need help with deployment of reports (SSRS 2005). we need to deploy many reports (more then 100) on the production everytime we make changes in them.
"the problem is we cannot install visual studio on the server to open the project and use the deploy option from it" i tried using the script - PublishSampleReports.rss
but everytime i run i need to go and manully configure the report to map the shared datasource to it. any way to pass the information in the script itself, or is there any smart way to deploy on production.
/chandresh soni
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Mar 19, 2008
Hello All,
I am having an issue deploying reports to my Production server via VS 2003 IDE.
The scenario is that I have a dev box with all 3 components installed on the same server(VS 2003, SQL 2000, sp3 , IIS and Report Server). I have no problem deploying to this Dev server. Now I need to deploy them to a different server(Release) in a different Domain. The Release implementation is, IIS and Report Services installed on one Server and SQL instance on a different server , but both IIS and SQL server are in the same domain. So in my VS 2003 IDE I choose a project/solution and then right click to Deploy I get an error " A connection could not be made to the report server <server URL>". My Solution Property page "Target Server URL " is pointed to this Release server virtual directory(http://Release:81/Reports). This Relase IIS web server has different web site, I installed the RS in the Default website.
I can browse RS server(http://Release:81/Reports) from anywhere via web and get to Site settings and all, But I cannot deploy from VS2003. Am I missing anything? Earlier I used to get at least log-in credentials to enter my UID and PW, as I provide them I never got anything back, it keeps asking me for UID and PW. Now I straight away get "Conection could not be made" error.
Any insights will be very helpfull.
Thank you
Ranjit
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Apr 12, 2006
This seems like a rather simple questions that I've hesitated posting for a day now, but as of yet I can't really find an answer through my searches online.
My SSIS package is using a couple of the Konesans Transforms, this worked fine on my development box with my dev SQL server. The time has come now to deploy my package to my production SQL server. The instructions on installing the transforms on my dev box all uses Visual Studio to add the components.
Is there a way to deploy 3rd party (own my own) SSIS tasks with the package? Does it require a seperate install? How can I do it without Visual Studio?
Thanks for any help,
-Dan
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May 18, 2007
Hello! I have the following problem. I developed CLR Stored Procedure "StartNotification" and deploy it on db. This sp calls external web service. Furthermore, this sp is called according with SQL Server Agent Job's schedule. On my PC SQL Server works under Local System account and this web service is called correctly (Executed as user: NT AUTHORITYSYSTEM). But on ther other server the following exception is raised during job running:
Date 17.04.2007 16:42:10
Log Job History (FailureNotificationJob)
Step ID 1
Server MSK-CDBPO-01
Job Name FailureNotificationJob
Step Name MainStep
Duration 00:00:00
Sql Severity 16
Sql Message ID 6522
Operator Emailed
Operator Net sent
Operator Paged
Retries Attempted 0
Message
Executed as user: CORPmssqlserver.
A .NET Framework error occurred during execution
of user defined routine or aggregate 'StartNotification':
System.Security.SecurityException: Request for the permission of type
'System.Net.WebPermission, System, Version=2.0.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089' failed. System.Security.SecurityException:
at System.Security.CodeAccessSecurityEngine.Check(Object demand,
StackCrawlMark& stackMark, Boolean isPermSet)
at System.Security.CodeAccessPermission.Demand()
at System.Net. The step failed.
What is the reason of this behaviour? Unfortunately I do not have direct access to this server.
I have the following guesses:
1) CORPmssqlserver may have not enough permissions to call web service
2) Something wrong with SQL Server account's permissions
2) Something wrong with SQL Server Agent account's permissions
I will take the will for the deed. Thanks.
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Oct 14, 2014
Was wondering, when performance changes have been made to existing code and deployed to a production environment, should anything be done regarding clearing old cache?
Is there a risk of the new code picking up cold or wrong cached query plans etc?
I know you can't clear the cache for the full system as it will affect everything else. But are the ways to target the changes? I.E run the new code with an OPTION (RECOMPILE) few times to build up new clean plans for it to use?
Or will the update stats see it is using bad plans and then start creating new clean ones over time?
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Apr 27, 2008
Hi
I need to move my packages from development to production.
In the development the database name is dev and in producton it is prod.
The username passwords are also different .
When i deploy my packages in production i dont think so it will work any pointers on how to make these things configurable like when the person deploying this package runs it he is prompted for the connection string and username and password
regards
Hrishy
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Aug 24, 2007
We have a system here where we develop SSIS packages on a development server. I am trying to figure out the cleanest way to promote these changes to a production server where stored procedures/tables that are used in the package are not deployed yet.
When I switch the connection in the package to the production server there are alot of objects in the package that are "invalidated" because they are trying to verify existence of tables/columns. One example is outputing the results of a query to a text file. The text file destination gets a red X on it because it cant grab the columns from the source query (because that stored procedure doesnt exist yet)
Is there a best practices or something on how to deploy packages to a production system? I have tried turning off "ValidateExternalMetaData" with no success.
Thanks!
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May 3, 2004
Hi,
I have a situation where I need to call a web service from the database (by an insert trigger on a table). Please let me know how I could do this.
Thanks in advance
Raj
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Mar 5, 2007
I would like to call a web service from a sql server 2000 s.proc/sql job, but if there is a better way please let me know. I'm using Captaris Workflow to create and manipulate workflow processes. I have a sql job that will create some pdf's. I want to call the web service that creates a new process in a step from that sql job. I have read about doing this with extended s.procs, but I'm trying to find any possible solutions. Essentially, the web method I want to call will insert several records into sql so I know I can at least do that. I would still like to know if I can make a call to the web service from the sql job. Thanks for any help.
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Jul 23, 2005
Hello.How can I call some functions on MSDE when working in Access (.mdb) that isconnected to MSDE via ODBC linked tables ? Especiallyin-line functions, that I would like to use as recordset for my forms andreports.Can I call in-line functions using ADO ? I tried, but it seems that onlystored procedures are allowed (adCmdStoredProc)....Thanks.
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Jan 4, 2013
if you can restore a database to Server B using Server A as the service. Meaning we would issue the command on Server A but somehow point to Server B as where we want the restore to happen.
The backup file would be in a location independent of both servers.
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May 9, 2008
Problem: Have to call SPs reside in 2 SQL server DBs which will return the table information, need to merge and perform sort the result and return the final result set. this is something like wrapper SP calling other SPs asynchronoulsy.
Can this be possible in SP / SQL functions to make asynchronous calls?
If yes can you please guide me to achive this.
If no, any alternative approach, or the reason why.
I appreciate your views on this.
-Hemanth
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May 4, 2006
With the new improvments to the web service task, we can now use variables as arguments in web service calls. I am trying to setup a call to the amazon web service ECS. I am trying to do a simple sellerlookup. I have played with the settings and gotten nowhere. I get one of two error when I try to execute. I can always use a scripting task or write my own task, but I would like to use the built in task if it is possible. Has anyone used AWS with SSIS?
[Web Service Task] Error: An error occurred with the following error message: "Microsoft.SqlServer.Dts.Tasks.WebServiceTask.WebserviceTaskException: Could not execute the Web method. The error is: Object reference not set to an instance of an object.. at Microsoft.SqlServer.Dts.Tasks.WebServiceTask.WebMethodInvokerProxy.InvokeMethod(DTSWebMethodInfo methodInfo, String serviceName, Object connection) at Microsoft.SqlServer.Dts.Tasks.WebServiceTask.WebServiceTaskUtil.Invoke(DTSWebMethodInfo methodInfo, String serviceName, Object connection, VariableDispenser taskVariableDispenser) at Microsoft.SqlServer.Dts.Tasks.WebServiceTask.WebServiceTask.executeThread()".
or
[Web Service Task] Error: An error occurred with the following error message: "Microsoft.SqlServer.Dts.Tasks.WebServiceTask.WebserviceTaskException: Could not execute the Web method. The error is: Method 'ProxyNamespace.AWSECommerceService.SellerLookup' not found.. at Microsoft.SqlServer.Dts.Tasks.WebServiceTask.WebMethodInvokerProxy.InvokeMethod(DTSWebMethodInfo methodInfo, String serviceName, Object connection) at Microsoft.SqlServer.Dts.Tasks.WebServiceTask.WebServiceTaskUtil.Invoke(DTSWebMethodInfo methodInfo, String serviceName, Object connection, VariableDispenser taskVariableDispenser) at Microsoft.SqlServer.Dts.Tasks.WebServiceTask.WebServiceTask.executeThread()".
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Aug 14, 2007
Ok, first some background.
I am writing my first (complex) CLR Stored Procedure using Visual Studio 2005.
This SP worked fine until I added code to make a web service call. That web service is a wrapper web service I created because the actual web service I need to call uses System. Web.Extensions which was not available in my VS2005 Database Project.
At first I was getting the standard "External Access Assembly" errors, so I created a new user (was using SA) and assigned database ownership to the new user, then assigned permissions to that user. This worked to get it deployed, but I get the following error when its run:
<code>
System.InvalidOperationException: Cannot load dynamically generated serialization assembly. In some hosting environments assembly load functionality is restricted, consider using pre-generated serializer. Please see inner exception for more information. ---> System.IO.FileLoadException: LoadFrom(), LoadFile(), Load(byte[]) and LoadModule() have been disabled by the host.
System.IO.FileLoadException:
at System.Reflection.Assembly.nLoadImage(Byte[] rawAssembly, Byte[] rawSymbolStore, Evidence evidence, StackCrawlMark& stackMark, Boolean fIntrospection)
at System.Reflection.Assembly.Load(Byte[] rawAssembly, Byte[] rawSymbolStore, Evidence securityEvidence)
at Microsoft.CSharp.CSharpCodeGenerator.FromFileBatch(CompilerParameters options, String[] fileNames)
at Microsoft.CSharp.CSharpCodeGenerator.FromSourceBatch(CompilerParameters options, String[] sources)
at Microsoft.CSharp.CSharpCodeGenerator.System.CodeDom.Compiler.ICodeCompiler.CompileAssemblyFromSourceBatch(CompilerParameters options, String[] sources)
at System.CodeDom.Compiler.CodeDomProvider.CompileAssemblyFromSource(CompilerParameters options, S
</code>
Anyone have any ideas?
Thanks!
Dave Borneman
Solution Architect,
anyWare Mobile Solutions.
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Sep 27, 2007
I'm having a terrible time trying to figure out how to do this, does anyone have experience?
My code works fine in the report viewer, but all I get from the deployment is #Error symbols. I've added my custom dll file to the config file and gave it full trust, as well as the URL of the web service I'm calling. I've even modified the rest of the codegroups within the file to FullTrust just in case.
I've also added the [assembly: AllowPartiallyTrustedCallers] to the AssemblyInfo class, and [WebPermission(SecurityAction.Assert)] to the constructor of my custom assembly no avail.
I'm at a complete loss now as to why my deployment cannot run this code. As far as debugging goes, Visual Studio is not located on the reporting server, nor is it an option to have it put there. I've been able to run the code with the web service lines commented out, but as soon as I put even the webservice.Credentials = CredentialCache.DefaultCredentials in I'm greeted with the nice and calming #Error.
Any suggestions?
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May 9, 2008
We usually wait until a service pack has been released for a product like SQL Server before using it in production. Is this over cautious or the norm?
Thanks
Danny
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Sep 14, 2006
I have two databases with two identical tables in seperate physical locations. I want database B tables to be updated automatically when database A tables change. Is there a way to call a web service from SQL to make this happen? Or is there a better way to do this? I would really like it to get the rows that were modified and then copy only those rows to the other database tables. If anyone knows if this can be done please let me know. Thank you.
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Feb 16, 2008
With regular .net web services in vb.net I can expose the service and call it like this:
http://server/EnrollmentLookup/EnrollmentService.asmx/GetS3MonitorLogs?StartDate=02/02/08&EndDate=02/05/08
But when I create a SQL XML Webservice via an endpoint all I can find on the net is how to show the wsdl.
http://localhost/Contacts?wsdl
Ive created a method in the "Contacts" webservice called GetContacts. Why cant I construct a similar url to execute that method without having to write a vb.net wrapper for it?
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May 3, 2004
Hi,
I have a situation where I need to call a web service from the database (by an insert trigger on a table). Please let me know how I could do this.
Thanks in advance
Raj
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May 21, 2007
It is possible to call WCF from SQL CLR, can I add a web reference or use the proxy created with svcutil ?
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Mar 19, 2008
Hello,
I have a microsoft report that uses a dll to calculate a value. If I hard code the value, my report shows it. My method in the dll is connecting to a database in order to calculate a result. However, in order to connect to the database, I am using Microsoft.Practices.EnterpriseLibrary.
The error in my report is:
Could not load file or assembly 'Microsoft.Practices.EnterpriseLibrary.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
I have added a reference in the report to the EnterpriseLibrary but this has not made a difference.
Many thanks!
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Oct 6, 2006
Hi,
I'm hoping someone has tried something similar before. I am trying to run an integration from a remote computer using a web service. I have set up the web service and the bog standard launch package routine works fine. What i'd like to be able to do is to launch a package and also specify any parameters associated with it. I have the following code which is identcal to the main launch sub with the exception of an extra argument (jagged array of varible name and value variablePair[4][2]). It also processes the variable array and sets them on the DTSPackage object.
[code]
[WebMethod]
public int LaunchSSISPackageWithVariables(string sourceType, string sourceLocation, string packageName, string[][] variableArray)
{
string packagePath;
Package myPackage;
Application integrationServices = new Application();
// Combine path and file name.
packagePath = Path.Combine(sourceLocation, packageName);
switch (sourceType)
{
case "file":
// Package is stored as a file.
// Add extension if not present.
if (String.IsNullOrEmpty(Path.GetExtension(packagePath)))
{
packagePath = String.Concat(packagePath, ".dtsx");
}
if (File.Exists(packagePath))
{
myPackage = integrationServices.LoadPackage(packagePath, null);
}
else
{
throw new ApplicationException("Invalid file location: " + packagePath);
}
break;
case "sql":
// Package is stored in MSDB.
// Combine logical path and package name.
//if (integrationServices.ExistsOnSqlServer(packagePath, ".", String.Empty, String.Empty))
if (integrationServices.ExistsOnSqlServer(packagePath, ".", "executeSSIS", "p4ssw0rd"))
{
//myPackage = integrationServices.LoadFromSqlServer(packageName, "(local)", String.Empty, String.Empty, null);
myPackage = integrationServices.LoadFromSqlServer(packageName, "(local)", "executeSSIS", "p4ssw0rd", null);
}
else
{
throw new ApplicationException("Invalid package name or location: " + packagePath);
}
break;
case "dts":
// Package is managed by SSIS Package Store.
// Default logical paths are File System and MSDB.
if (integrationServices.ExistsOnDtsServer(packagePath, "."))
{
myPackage = integrationServices.LoadFromDtsServer(packagePath, "localhost", null);
}
else
{
throw new ApplicationException("Invalid package name or location: " + packagePath);
}
break;
default:
throw new ApplicationException("Invalid sourceType argument: valid values are 'file', 'sql', and 'dts'.");
}
//Variables var = myPackage.Variables;
//foreach (string key in variablePairs.Keys)
//{
// var[key].Value = variablePairs[key].ToString();
//}
Variables var = myPackage.Variables;
for (int i = 0; i < variableArray.Length; i++)
{
var[variableArray[0]].Value = variableArray[1].ToString();
}
return (Int32)myPackage.Execute();
}
[/code]
For some reason the above code runs and passes back the value that it succeeded. Yet the package doesn't do what it should. Does anyone have any ideas as to why this might be the case or even a better way to pass the variables.
Many thanks,
Grant
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Jun 2, 2006
I currently have the fllowing Stored Procedure. When I pass the the Url of the web service in the parameters, I'm having a sp_OAMethor read response failed error.
I don't know how to pass the parameter as well as the name of the function in the Web Service I'm calling. Maybe I'm all wrong here with this code too?
Thanks for any help.
ALTER PROCEDURE [dbo].[pTAPServiceWeb]
@sUrl varchar(200),
@response varchar(8000) out
AS
DECLARE @obj int
DECLARE @hr int
DECLARE @status int
DECLARE @msg varchar(255)
EXEC @hr = sp_OACreate 'MSXML2.ServerXMLHttp', @obj OUT
IF @hr < 0
BEGIN
RAISERROR('sp_OACreate MSXML2.ServerXMLHttp failed', 16, 1)
RETURN
END
EXEC @hr = sp_OAMethod @obj, 'Open', NULL, 'GET', @sUrl, false
IF @hr < 0
BEGIN
SET @msg = 'sp_OAMethod Open failed'
GOTO err
END
EXEC @hr = sp_OAMethod @obj, 'send'
IF @hr < 0
BEGIN
SET @msg = 'sp_OAMethod Send failed'
GOTO err
END
EXEC @hr = sp_OAGetProperty @obj, 'status', @status OUT
IF @hr < 0
BEGIN
SET @msg = 'sp_OAMethod read status failed'
GOTO err
END
-- IF @status <> 200
-- BEGIN
-- SET @msg = 'sp_OAMethod http status ' + str(@status)
-- GOTO err
-- END
EXEC @hr = sp_OAGetProperty @obj, 'responseText', @response OUT
IF @hr < 0
BEGIN
SET @msg = 'sp_OAMethod read response failed'
GOTO err
END
EXEC @hr = sp_OADestroy @obj
RETURN
err:
EXEC @hr = sp_OADestroy @obj
RAISERROR(@msg, 16, 1)
RETURN
GO
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Feb 9, 2007
Appreciate if anyone can show me the code to call a web service from Script Component ?
I cannot use the Web Service Task. Because parameters to the webservice are from rows of data inside Data Flow Task.
Thanks !!
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Jul 2, 2007
I am trying to call a web service using the web service task and passing it variables, but even when I set variables to be Strings/any other data type, they always get passed out as objects. The call is then rejected based on the fact that there is no web service that accepts those parameter types. If there is a workaround to this problem, that would be great, otherwise I think I'm going to have to call the web services in a script task. Would someone please give me an example of the steps necessary to call a web service from the script task?
Thank you,
James Mac William
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Jan 11, 2007
Hi,
I m trying to use the web services task, but when i try to run it i got the following error
[Web Service Task] Error: An error occurred with the following error message: "Microsoft.SqlServer.Dts.Tasks.WebServiceTask.WebserviceTaskException: Could not execute the Web method. The error is: Object reference not set to an instance of an object.. at Microsoft.SqlServer.Dts.Tasks.WebServiceTask.WebMethodInvokerProxy.InvokeMethod(DTSWebMethodInfo methodInfo, String serviceName, Object connection) at Microsoft.SqlServer.Dts.Tasks.WebServiceTask.WebServiceTaskUtil.Invoke(DTSWebMethodInfo methodInfo, String serviceName, Object connection, VariableDispenser taskVariableDispenser) at Microsoft.SqlServer.Dts.Tasks.WebServiceTask.WebServiceTask.executeThread()".
This is probably because i never worked with this task, even so, does anyone knows what might be wrong?
I got a connection a wsdl, i can configure the service, method and variables(i use fixed values), and i configure the output to a variable with the type object(i have tryed string and int)
I even can download the wsdl file, but the error seems to be in the connection
Thanks
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Apr 2, 2007
We have a requirement to call a Web Service method from SSIS where the method accepts a single parameter that is derived from a database recordset and can exceed 4k characters. From the little we know about the Web Service task it is limited to only accepting direct input and variables. Does anyone have any suggestions to overcoming this issue? Any detailed information in possibly calling the Web Service from script or using an object variable would be extremely appreciated.
Thank you in advance for your help.
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Feb 7, 2007
Hi Remus,
I just started looking into SB about a week ago, so my question is likely to be pretty lame. However, that's not going to stop me from asking it :-)
We're trying to do something similar to what you're describing here. How do you "reset" a dialog timer? Why would you need to deal with resetting timers (or with timers at all for that matter) in the event of a success? Couldn't you rewrite the logic to be as follows?
begin transaction
receive message
if message is web request
save state of request (http address, caller etc)
else if message is retry timer message
load state of request
endif
commit
do the web request (no transaction open)
if success
begin transaction
send back response
end conversation
commit
else
set a retry timer on the dialog (say 1 minute) using BEGIN DIALOG TIMER
endif
Also, when you set the retry timer you have to associate it with the saved request state, right? Otherwise, how will the service know which request to load on receipt of the timer message?
TIA.
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Nov 28, 2007
Hello ,
I get this error (connection closed) in web applications, whenever SQL Server database Service is restarted. When I run the application again, the error disappears. Granted that there are lots of users and Database gets restarted every night is not helping.
Is there any setting in the JDBC driver properties, where I can tell it to open a closed connection (like a retry count), rather than fail the first time and work the second time.
We use
1. SQL SERVER 2005 SP2,
2. Websphere Protal Server 5.1
3. SQL SERVER 2005 JDBC driver 1.1(com.microsoft.sqlserver.jdbc.SQLServerConnectionPoolDataSource.)
I am wondering if connection pool driver is causing this problem. I do not care about connection pooling, but Websphere doen not seem to like any other JDBC Driver. I don't mind switching to another driver as the last option.
Error is :
[11/27/07 17:01:59:331 MST] 7202440d WSRdbManagedC W DSRA0080E: An exception was received by the Data Store Adapter. See original exception message: com.microsoft.sqlserver.jdbc.SQLServerException: The connection is closed.
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.checkClosed(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.getCatalog(Unknown Source)
at com.ibm.ws.rsadapter.spi.WSRdbManagedConnectionImpl.getCatalog(WSRdbManagedConnectionImpl.java:676)
at com.ibm.ws.rsadapter.spi.WSRdbManagedConnectionImpl.introspectSelf(WSRdbManagedConnectionImpl.java:808)
at com.ibm.ws.rsadapter.FFDCLogger.introspect(FFDCLogger.java:169)
at com.ibm.ws.rsadapter.jdbc.WSJdbcConnection.introspectSelf(WSJdbcConnection.java:1253)
at com.ibm.ws.ffdc.IntrospectionLevelMember.getNextMembers(IntrospectionLevelMember.java(Compiled Code))
at com.ibm.ws.ffdc.IntrospectionLevel.getNextLevel(IntrospectionLevel.java:181)
at com.ibm.ws.ffdc.ObjectIntrospectorImpl.dumpContents(ObjectIntrospectorImpl.java:67)
at com.ibm.ws.ffdc.ObjectIntrospectorImpl.dumpContents(ObjectIntrospectorImpl.java:51)
at com.ibm.ws.ffdc.IncidentStreamImpl.introspectAndWrite(IncidentStreamImpl.java:396)
at com.ibm.ws.ffdc.IncidentStreamImpl.introspectAndWriteLine(IncidentStreamImpl.java:632)
at com.ibm.ws.ffdc.DiagnosticEngine.dumpObjectAndStack(DiagnosticEngine.java:301)
at com.ibm.ws.ffdc.DiagnosticEngine.processIncident(DiagnosticEngine.java:147)
at com.ibm.ws.ffdc.FFDCFilter.filterEngine(FFDCFilter.java:428)
.......lots of lines
Regards
Bobba
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Jan 11, 2008
Is there a way to modify the RSReportServer.config file with a Web Service call. We want to install an app and have it modify the Renders. We want to remove the Tiff export for example. We also want to add simple headers to Excel. Right now we have to open the file and then make our edits.
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May 26, 2006
I was playing around with the new SQL 2005 CLR functionality andremembered this discussion that I had with Erland Sommarskog concerningperformance of scalar UDFs some time ago (See "Calling sp_oa* infunction" in this newsgroup). In that discussion, Erland made thefollowing comment about UDFs in SQL 2005:[color=blue][color=green]>>The good news is that in SQL 2005, Microsoft has addressed several of[/color][/color]these issues, and the cost of a UDF is not as severe there. In fact fora complex expression, a UDF in written a CLR language may be fasterthanthe corresponding expression using built-in T-SQL functions.<<I thought the I would put this to the test using some of the same SQLas before, but adding a simple scalar CLR UDF into the mix. The testinvolved querying a simple table with about 300,000 rows. Thescenarios are as follows:(A) Use a simple CASE function to calculate a column(B) Use a simple CASE function to calculate a column and as a criterionin the WHERE clause(C) Use a scalar UDF to calculate a column(D) Use a scalar UDF to calculate a column and as a criterion in theWHERE clause(E) Use a scalar CLR UDF to calculate a column(F) Use a scalar CLR UDF to calculate a column and as a criterion inthe WHERE clauseA sample of the results is as follows (time in milliseconds):(295310 row(s) affected)A: 1563(150003 row(s) affected)B: 906(295310 row(s) affected)C: 2703(150003 row(s) affected)D: 2533(295310 row(s) affected)E: 2060(150003 row(s) affected)F: 2190The scalar CLR UDF function was significantly faster than the classicscalar UDF, even for this very simple function. Perhaps a more complexfunction would have shown even a greater difference. Based on this, Imust conclude that Erland was right. Of course, it's still faster tostick with basic built-in functions like CASE.In another test, I decided to run some queries to compare built-inaggregates vs. a couple of simple CLR aggregates as follows:(G) Calculate averages by group using the built-in AVG aggregate(H) Calculate averages by group using a CLR aggregate that similatesthe built-in AVG aggregate(I) Calculate a "trimmed" average by group (average excluding highestand lowest values) using built-in aggregates(J) Calculate a "trimmed" average by group using a CLR aggregatespecially designed for this purposeA sample of the results is as follows (time in milliseconds):(59 row(s) affected)G: 313(59 row(s) affected)H: 890(59 row(s) affected)I: 216(59 row(s) affected)J: 846It seems that the CLR aggregates came with a significant performancepenalty over the built-in aggregates. Perhaps they would pay off if Iwere attempting a very complex type of aggregation. However, at thispoint I'm going to shy away from using these unless I can't find a wayto do the calculation with standard SQL.In a way, I'm happy that basic SQL still seems to be the fastest way toget things done. With the addition of the new CLR functionality, Isuspect that MS may be giving us developers enough rope to comfortablyhang ourselves if we're not careful.Bill E.Hollywood, FL------------------------------------------------------------------------- table TestAssignment, about 300,000 rowsCREATE TABLE [dbo].[TestAssignment]([TestAssignmentID] [int] NOT NULL,[ProductID] [int] NULL,[PercentPassed] [int] NULL,CONSTRAINT [PK_TestAssignment] PRIMARY KEY CLUSTERED([TestAssignmentID] ASC)--Scalar UDF in SQLCREATE FUNCTION [dbo].[fnIsEven](@intValue int)RETURNS bitASBEGINDeclare @bitReturnValue bitIf @intValue % 2 = 0Set @bitReturnValue=1ElseSet @bitReturnValue=0RETURN @bitReturnValueEND--Scalar CLR UDF/*using System;using System.Data;using System.Data.SqlClient;using System.Data.SqlTypes;using Microsoft.SqlServer.Server;public partial class UserDefinedFunctions{[Microsoft.SqlServer.Server.SqlFunction(IsDetermini stic=true,IsPrecise=true)]public static SqlBoolean IsEven(SqlInt32 value){if(value % 2 == 0){return true;}else{return false;}}};*/--Test #1--Scenario A - Query with calculated column--SELECT TestAssignmentID,CASE WHEN TestAssignmentID % 2=0 THEN 1 ELSE 0 END ASCalcColumnFROM TestAssignment--Scenario B - Query with calculated column as criterion--SELECT TestAssignmentID,CASE WHEN TestAssignmentID % 2=0 THEN 1 ELSE 0 END ASCalcColumnFROM TestAssignmentWHERE CASE WHEN TestAssignmentID % 2=0 THEN 1 ELSE 0 END=1--Scenario C - Query using scalar UDF--SELECT TestAssignmentID,dbo.fnIsEven(TestAssignmentID) AS CalcColumnFROM TestAssignment--Scenario D - Query using scalar UDF as crierion--SELECT TestAssignmentID,dbo.fnIsEven(TestAssignmentID) AS CalcColumnFROM TestAssignmentWHERE dbo.fnIsEven(TestAssignmentID)=1--Scenario E - Query using CLR scalar UDF--SELECT TestAssignmentID,dbo.fnIsEven_CLR(TestAssignmentID) AS CalcColumnFROM TestAssignment--Scenario F - Query using CLR scalar UDF as crierion--SELECT TestAssignmentID,dbo.fnIsEven_CLR(TestAssignmentID) AS CalcColumnFROM TestAssignmentWHERE dbo.fnIsEven(TestAssignmentID)=1--CLR Aggregate functions/*using System;using System.Data;using System.Data.SqlClient;using System.Data.SqlTypes;using Microsoft.SqlServer.Server;[Serializable][Microsoft.SqlServer.Server.SqlUserDefinedAggregate (Format.Native)]public struct Avg{public void Init(){this.numValues = 0;this.totalValue = 0;}public void Accumulate(SqlDouble Value){if (!Value.IsNull){this.numValues++;this.totalValue += Value;}}public void Merge(Avg Group){if (Group.numValues > 0){this.numValues += Group.numValues;this.totalValue += Group.totalValue;}}public SqlDouble Terminate(){if (numValues == 0){return SqlDouble.Null;}else{return (this.totalValue / this.numValues);}}// private accumulatorsprivate int numValues;private SqlDouble totalValue;}[Serializable][Microsoft.SqlServer.Server.SqlUserDefinedAggregate (Format.Native)]public struct TrimmedAvg{public void Init(){this.numValues = 0;this.totalValue = 0;this.minValue = SqlDouble.MaxValue;this.maxValue = SqlDouble.MinValue;}public void Accumulate(SqlDouble Value){if (!Value.IsNull){this.numValues++;this.totalValue += Value;if (Value < this.minValue)this.minValue = Value;if (Value > this.maxValue)this.maxValue = Value;}}public void Merge(TrimmedAvg Group){if (Group.numValues > 0){this.numValues += Group.numValues;this.totalValue += Group.totalValue;if (Group.minValue < this.minValue)this.minValue = Group.minValue;if (Group.maxValue > this.maxValue)this.maxValue = Group.maxValue;}}public SqlDouble Terminate(){if (this.numValues < 3)return SqlDouble.Null;else{this.numValues -= 2;this.totalValue -= this.minValue;this.totalValue -= this.maxValue;return (this.totalValue / this.numValues);}}// private accumulatorsprivate int numValues;private SqlDouble totalValue;private SqlDouble minValue;private SqlDouble maxValue;}*/--Test #2--Scenario G - Average Query using built-in aggregate--SELECT ProductID, Avg(Cast(PercentPassed AS float))FROM TestAssignmentGROUP BY ProductIDORDER BY ProductID--Scenario H - Average Query using CLR aggregate--SELECT ProductID, dbo.Avg_CLR(Cast(PercentPassed AS float)) AS AverageFROM TestAssignmentGROUP BY ProductIDORDER BY ProductID--Scenario I - Trimmed Average Query using built in aggregates/setoperations--SELECT A.ProductID,CaseWhen B.CountValues<3 Then NullElse Cast(A.Total-B.MaxValue-B.MinValue ASfloat)/Cast(B.CountValues-2 As float)End AS AverageFROM(SELECT ProductID, Sum(PercentPassed) AS TotalFROM TestAssignmentGROUP BY ProductID) ALEFT JOIN(SELECT ProductID,Max(PercentPassed) AS MaxValue,Min(PercentPassed) AS MinValue,Count(*) AS CountValuesFROM TestAssignmentWHERE PercentPassed Is Not NullGROUP BY ProductID) BON A.ProductID=B.ProductIDORDER BY A.ProductID--Scenario J - Trimmed Average Query using CLR aggregate--SELECT ProductID, dbo.TrimmedAvg_CLR(Cast(PercentPassed AS real)) ASAverageFROM TestAssignmentGROUP BY ProductIDORDER BY ProductID
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Mar 19, 2008
Hi,
I am producing a php report using SQL queries to show the SLA status of our calls. Each call has response, fix & completion targets. If any of these targets are breached, the whole SLA status is set as 'Breach'.
The results table should look like the one below:
CallRef.
Description
Severity
ProblemRef
Logged
Date
Call
Status
SLA Status
C0001
Approval for PO€™s not received
2
DGE0014
05-01-06 14:48
Resolved
Breach
C0002
PO€™s not published
2
DGE0014
06-01-06 10:21
Resolved
OK
C0003
Approval for PO€™s not received from Siebel.
2
n/a
05-01-06 14:48
Investigating
OK
Whereas I can pick the results for the first 6 columns from my Select query, the 'SLA Status' column requires the following calculation:
if (due_date < completed_date)
{ sla_status = 'OK';
}
else sla_status = 'Breach';
The Select statement in my query is looking like this...
Select Distinct CallRef, Description, Severity, ProblemRef, Logdate, Status, Due_date, Completed_date;
The problem is that my query is returning multiple entries for each stage of the call (see below), whereas I just want one entry for each call, with SLA status 'Breach' if any of the stages for the call were out of SLA.
CallRef.
Description
Severity
ProblemRef
Logged
Date
Call
Status
SLA Status
C0001
Approval for PO€™s not received
2
DGE0014
05-01-06 14:48
Resolved
Breach
C0001
Approval for PO€™s not received
2
DGE0014
05-01-06 14:48
Resolved
OK
C0001
Approval for PO€™s not received
2
DGE0014
05-01-06 14:48
Resolved
Breach
Any help will be much much appreciated, this issue has been bothering me for some time now!!!
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