How do I execute an alter type DQL via DFS as a service context?

Derrick

In my C# application, I am calling DFS as a service, by making service references to the wsdl files on the DFS server.  Next, I create an object of type PassthroughQuery and assign it the DQL alter type statement.  Using a valid QueryServicePortClient object, I call its execute method and pass in my PassthroughQuery object as a parameter, as well as the QueryExecution object as a parameter.

However, my program throws an exception with the error message:

"QUERY" action failed.

And the confusing stack trace of:

Server stack trace:
   at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]:
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at D6_Value_Assistance_Manager.QueryService.QueryServicePort.execute(executeRequest request)
   at D6_Value_Assistance_Manager.QueryService.QueryServicePortClient.D6_Value_Assistance_Manager.QueryService.QueryServicePort.execute(executeRequest request) in C:\Derrick\ProgramCode\Documentum\D6_Value_Assistance_Manager\Service References\QueryService\Reference.cs:line 5001
   at D6_Value_Assistance_Manager.QueryService.QueryServicePortClient.execute(Query query, QueryExecution execution, OperationOptions options) in C:\Derrick\ProgramCode\Documentum\D6_Value_Assistance_Manager\Service References\QueryService\Reference.cs:line 5009
   at D6_Value_Assistance_Manager.DfsWrapper.updateValueAssistance(String customType, String customAttribute, String valueAssistanceValues) in C:\Derrick\ProgramCode\Documentum\D6_Value_Assistance_Manager\DfsWrapper.cs:line 332

What type of object should I instantiate my DFS query as so it can execute ALTER TYPE DQL queries?

zhou_simonq

if you're using DFS productivity layer for .NET, you can refer to the sample shipped in DFS SDK.

for wsdl consumer, you can find Axis and Jaxws samples in DFS SDK.