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• What is a correct step by step logic of exporting scene with baked occlusion for loading it at runtime?

  - by myWallJSON

  I wonder what is a correct step by step logic of exporting scene with baked occlusion (Culling data) for loading that scene at runtime (on fly from the internet for example))? So currently my plan looks like this: I create prefabs Place them onto my scene (into Hierarchy) (say create 20 buffolows and some hourses and some buildings) Create empty prefab and drag all my scene objects from hierarchy onto it Export prefab So generally I put all my scene objects into one large prefab and export it but it seems that all objects that were marked as static get this property turned off when loading them at runtime and so no Frustrum Culling, and no Occlusion culling happens. So I wonder what is a correct way of exporting Sceen + Objecrts + Occlusion (and onther culing) data for future load of such scene at runtime? I wonder about current 3.5.2 Pro and future 4 Pro versions of U3D.

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• Backing up my data causes my server to crash using Symantec Backup Exec 12, or How I Came to Loathe Irony

  - by Kyle Noland

  I have a Dell PowerEdge 2850 running Windows Server 2003. It is the primary file server for one of my clients. I have another server also running Windows Server 2003 that acts as the core media server for Symantec Backup Exec 12. I recently upgraded from Backup Exec 11d to 12. This upgrade was necessary because we also just upgraded from Exchange 2003 to Exchange 2007. After the upgrade I had to push-install the new version 12 Backup Exec Remote Agents to each of the servers I am backing up (about 6 total). 5 of my servers are doing just fine, faithfully completing backups every night. My file server routinely crashes. Observations: When the server crashes, it does not blue screen, it just locks up completely. Even the mouse is unresponsive. If you leave the server locked up long enough, it will eventually reboot itself and hang on the Windows splash screen. There is absolutely zero useful Event Viewer evidence of a problem. The logs go from routine logging to an Unexplained Shutdown Event the next morning when I have to hard reset the server to get it to boot. 90% of the time the server does not boot cleanly, it hangs on the Windows splash screen. I don't have any light to shed here. When the server hangs all I can do is hard reset it and try again. Even after a successful boot and chkdsk /r operation, if you reboot the machine, you have a 90% chance it won't back up again cleanly. The back story: This server started crashing during nightly backups about a month ago. I tried everything I could think of to troubleshoot the problem and eventually had to give up because I could not keep coming to the office at 4 AM to try to get the server back online. One Friday I got lucky and the server stayed up for its entire full backup. I took this opportunity to restore the full backup to a temporary server I set up and switched all my users to the temporary. Then I reloaded the ailing file server. I kept all my users on the temporary file server for about 3 weeks. I installed the same Backup Exec Remote Agent and Trend Micro A/V client on the temporary server that I was using on the regular file server. During this time, I had absolutely no problems backing up the temporary server. I tested the reloaded file server extensively. I rebooted the server once an hour every day for 3 weeks trying to make it fail. It never did. I felt confident that the reload was the answer to my problems. I moved all of the data from the temporary server back to the regular server. I got 3 nightly backups out of it before it locked up again and started the familiar failure to boot cleanly behavior. This weekend I decided to monitor the file server through the entire backup job. I RDPd into the file server and also into the server running Backup Exec. On the file server I opened the Task Manager so I could view the processes and watch CPU and memory usage. Everything was running smoothly for about 60GB worth of backup. Then I noticed that the byte count of the backup job in Backup Exec had stopped progressing. I looked back over at my RDP session into the file server, and I was getting real time updates about CPU and memory usage still - both nearly 0%, which is unusual. Backups usually hover around 40% usage for the duration of the backup job. Let me reiterate this point: The screen was refreshing and I was getting real time Task Manager updates - until I clicked on the Start menu. The screen went black and the server locked up. In truth, I think the server had already locked up, the video card just hadn't figured it out yet. I went back into my bag of trick: driving to the office and hard reseting the server over and over again when it hangs up at the Windows splash screen. I did this for 2 hours without getting a successful boot. I started panicking because I did not have a decent backup to use to get everything back onto the working temporary file server. Once I exhausted everything I knew to do, I took a deep breath, booted to the Windows Server 2003 CD and performed a repair installation of Windows. The server came back up fine, with all of my data intact. I can now reboot the server at will and it will come back up cleanly. The problem is that I'm afraid as soon as I try to back that data up again I will back at square one. So let me sum things up: Here is what I've done so far to troubleshoot this server: Deleted and recreated the RAID 5 sets. Initialized the drives. Reloaded the server with a fresh Server 2003 install. Confirmed with Dell that I have installed the latest, Dell approved BIOS and NIC drivers. Uninstalled / reinstalled the Backup Exec Remote Agent. Uninstalled the Trend Micro A/V client. Configured the server not to reboot itself after a blue screen so I can see any stop error. I used to think the server was blue screening, but since I enabled this setting I now know that the server just completely locks up. Run chkdsk /r from the Windows Recovery Console. Several errors were found and corrected, but did not help my problem. Help confirm or deny the following assumptions: There are two problems at work here. Why the server is locking up in the first place, and why the server won't boot cleanly after a lockup. This is ultimately a software problem. The server works fine and can be rebooted cleanly all day long - until the first lockup - following a fresh OS load or even a Repair installation. This is not a problem with Backup Exec in general. All of my other servers back up just fine. For the record, all of the other servers run Server 2003, and some of them house more data than the file server in question here. Any help is appreciated. The irony is almost too much to bear. Backing up my data is what is jeopardizing it.

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• Nhibernate upgraded getting 'Antlr.Runtime.NoViableAltException' on outer join using *=

  - by user86431

  so we upgraded to newer Nhibernate and Fluent Nhibernate. now I' getting this exception: FailedNHibernate.Hql.Ast.ANTLR.QuerySyntaxException: Exception of type 'Antlr.Runtime.NoViableAltException' was thrown. near line 1, column 459 On this hql, which worked fine before the upgrade. SELECT s.StudId, s.StudLname, s.StudFname, s.StudMi, s.Ssn, s.Sex, s.Dob, et.EnrtypeId, et.Active, et.EnrId, sss.StaffLname, sss.StaffFname, sss.StaffMi,vas.CurrentAge FROM CIS3G.Jcdc.EO.StudentEO s , CIS3G.Jcdc.EO.EnrollmentEO e , CIS3G.Jcdc.EO.EnrollmentTypeEO et , CIS3G.Jcdc.EO.VwStaffStudentStaffEO sss, CIS3G.Jcdc.EO.VwAgeStudentEO vas WHERE ( e.EnrId = et.EnrId ) AND ( s.StudId = vas.StudId ) AND ( s.StudId = e.StudId ) AND ( et.EnrtypeId *= sss.EnrtypeId ) AND ( Isnull ( sss.StudStaffRoleCd , 1044 ) = 1044 ) AND ( s.StudId = 4000 ) Clearly it does nto like the *= syntax, I tried rewritign is as ansi sql outer join and no joy. Can anyone tell me what ineed to change the sql to so I can get the outer join to work correctly? Thanks, Eric-

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• System.Security.VerificationException: Operation could destabilize the runtime

  - by Rigobert Song

  I have a web service which is queried using linq to sql but returns an array of objects. I keep getting the following error: System.Security.VerificationException: Operation could destabilize the runtime When I run a method that uses a linq statement to return an array I get this error, but only on my test server, which is windows server 2008. Everything works fine in my win 7 machine. The project is a .net 3.5. Any ideas what the problem might be? Thanks UPDATE: My linq queries return IQueryable.

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• Calling Grep inside Java gives incorrect results while calling grep in shell gives correct results.

  - by futureelite7

  I've got a problem where calling grep from inside java gives incorrect results, as compared to the results from calling grep on the same file in the shell. My grep command (called both in Java and in bash. I escaped the slash in Java accordingly): /bin/grep -vP --regexp='^[0-9]+\t.*' /usr/local/apache-tomcat-6.0.18/work/Catalina/localhost/saccitic/237482319867147879_1271411421 Java Code: String filepath = "/path/to/file"; String options = "P"; String grepparams = "^[0-9]+\\t.*"; String greppath = "/bin/"; String[] localeArray = new String[] { "LANG=", "LC_COLLATE=C", "LC_CTYPE=UTF-8", "LC_MESSAGES=C", "LC_MONETARY=C", "LC_NUMERIC=C", "LC_TIME=C", "LC_ALL=" }; options = "v"+options; //Assign optional params if (options.contains("P")) { grepparams = "\'"+grepparams+"\'"; //Quote the regex expression if -P flag is used } else { options = "E"+options; //equivalent to calling egrep } proc = sysRuntime.exec(greppath+"/grep -"+options+" --regexp="+grepparams+" "+filepath, localeArray); System.out.println(greppath+"/grep -"+options+" --regexp="+grepparams+" "+filepath); inStream = proc.getInputStream(); The command is supposed to match and discard strings like these: 85295371616 Hi Mr Lee, please be informed that... My input file is this: 85aaa234567 Hi Ms Chan, please be informed that... 85292vx5678 Hi Mrs Ng, please be informed that... 85295371616 Hi Mr Lee, please be informed that... 85aaa234567 Hi Ms Chan, please be informed that... 85292vx5678 Hi Mrs Ng, please be informed that... 85295371616 Hi Mr Lee, please be informed that... 85295371616 Hi Mr Lee, please be informed that... 85295371616 Hi Mr Lee, please be informed that... 85295371616 Hi Mr Lee, please be informed that... 85295371616 Hi Mr Lee, please be informed that... 8~!95371616 Hi Mr Lee, please be informed that... 85295371616 Hi Mr Lee, please be informed that... 852&^*&1616 Hi Mr Lee, please be informed that... 8529537Ax16 Hi Mr Lee, please be informed that... 85====ppq16 Hi Mr Lee, please be informed that... 85291234783 a3283784428349247233834728482984723333 85219299222 The commands works when I call it from inside bash (Results below): 85aaa234567 Hi Ms Chan, please be informed that... 85292vx5678 Hi Mrs Ng, please be informed that... 85aaa234567 Hi Ms Chan, please be informed that... 85292vx5678 Hi Mrs Ng, please be informed that... 8~!95371616 Hi Mr Lee, please be informed that... 852&^*&1616 Hi Mr Lee, please be informed that... 8529537Ax16 Hi Mr Lee, please be informed that... 85====ppq16 Hi Mr Lee, please be informed that... 85219299222 However, when I call grep again inside java, I get the entire file (Results below): 85aaa234567 Hi Ms Chan, please be informed that... 85292vx5678 Hi Mrs Ng, please be informed that... 85295371616 Hi Mr Lee, please be informed that... 85aaa234567 Hi Ms Chan, please be informed that... 85292vx5678 Hi Mrs Ng, please be informed that... 85295371616 Hi Mr Lee, please be informed that... 85295371616 Hi Mr Lee, please be informed that... 85295371616 Hi Mr Lee, please be informed that... 85295371616 Hi Mr Lee, please be informed that... 85295371616 Hi Mr Lee, please be informed that... 8~!95371616 Hi Mr Lee, please be informed that... 85295371616 Hi Mr Lee, please be informed that... 852&^*&1616 Hi Mr Lee, please be informed that... 8529537Ax16 Hi Mr Lee, please be informed that... 85====ppq16 Hi Mr Lee, please be informed that... 85291234783 a3283784428349247233834728482984723333 85219299222 What could be the problem that will cause the grep called by Java to return incorrect results? I tried passing local information via the environment string array in runtime.exec, but nothing seems to change. Am I passing in the locale information incorrectly, or is the problem something else entirely?

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• Unknown runtime error number: -2146827687

  - by Simone Vellei

  I have an error in my GXT code on Internet Explorer (both Development Mode and not) when i try to attach a label to a panel. The error is "Unknown runtime error number: -2146827687" but this error in a GWT module is throws always, in other gwt modules with a label attached to the panel the error there isn't. The layout of panel is a GridFormLayout developed by me. The error is thrown when the renderComponentInCell is called (the method is called on doLayout) and the component is not rendered (else condition). private void renderComponentInCell(Component component, Element cell) { if (component.isRendered()) { cell.appendChild(component.getElement()); } else { component.render(cell); } } What can I do?

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• Cygwin compiling error: "this application has requested the runtime to terminate it in an unusual wa

  - by naspinski

  I am trying to run Cygwin, and I am running into some problems. I tried to compile a program that works both on Windows with mingw and on a Unix system, but when I go to compile it through Cygwin: gcc threads.c -o threads I get the error: this application has requested the runtime to terminate it in an unusual way And that's it... any ideas what I am forgetting or screwing up? I haven't touched this stuff in about 5 years so I am beyond rusty; thanks!

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• Jquery runtime error: object expected

  - by Joris

  The Jquery script that controls my tabcontainer gives an "object expected" runtime error. I honestly can't find the reason why: $(document).ready(function() { //When page loads... $(".tab_content").hide(); //Hide all content $("ul.tabs li:first").addClass("active").show(); //Activate first tab $(".tab_content:first").show(); //Show first tab content //On Click Event $("ul.tabs li").click(function() { $("ul.tabs li").removeClass("active"); //Remove any "active" class $(this).addClass("active"); //Add "active" class to selected tab $(".tab_content").hide(); //Hide all tab content var activeTab = $(this).find("a").attr("href"); //Find the href attribute value to identify the active tab + content $(activeTab).fadeIn(); //Fade in the active ID content return false; }); }); Has it something to do with the stylesheet?

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• Assign binding path at runtime in WPF DataTemplate

  - by Abiel

  I am writing a WPF program in C# in which I have a ListView for which the columns will be populated at runtime. I would like to use a custom DataTemplate for the GridViewColumn objects in the ListView. In the examples I have seen where the number of columns is fixed in advance, a custom DataTemplate is often created using something like the XAML below. <DataTemplate x:Key="someKey"> <TextBlock Text="{Binding Path=FirstName}" /> </DataTemplate> This DataTemplate could also later be assigned to GridViewColumn.CellTemplate in the code-behind by calling FindResource("someKey"). However, this alone is of no use to me, because in this example the Path element is fixed to FirstName. Really I need something where I can set the Path in code. It is my impression that something along these lines may be possible if XamlReader is used, but I'm not sure how in practice I would do this. Any solutions are greatly appreciated.

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• Need to get .obj file names of Executable(which one is crrently executing) at runtime programaticall

  - by Usman

  Suppose I have a VC++ project contains no of(say e.g 5) Source files(.cpp files),it will generate 5 .obj files(obj files corresponding to my .cpp's files not all kernel and OS layers including .obj files) e.g my project includes xyz_1.cpp,xyz_2.cpp,xyz_3.cpp,xyz_4.cpp,it will corresponds 4 respective .objs. By programtaically HOW CAN I TAKE AND GET THE NAMES OF THESE 4 .OBJ files at runtime(On run time I need to check how many obj files & names of those objs). REMEMBER I DON'T NEED ALL KERNEL AND OS LAYER .OBJS I ONLY NEED OBJS OF MY .CPPs. Regards Usman

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• Add functions in gdb at runtime

  - by Michael Anderson

  I'm trying to debug some STL based C++ code in gdb. The code has something like int myfunc() { std::map<int,int> m; ... } Now in gdb, inside myfunc using "print m" gives something very ugly. What I've seen recommended is compiling something like void printmap( std::map<int,int> m ) { for( std::map<int,int>::iterator it = ... ) { printf("%d : %d", it->first, it->second ); } } Then in gdb doing (gdb) call printmap( m ) This seems like a good way to handle the issue... but can I put printmap into a seperate object file (or even dynamic library) that I then load into gdb at runtime rather than compiling it into my binary - as recompiling the binary every time I want to look at another STL variable is not fun .. while compiling and loading a single .o file for the print routine may be acceptable.

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• Unable to find static resource in runtime even while designer can see it

  - by xumix

  So i have this markup: <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:Werp.MigrationHelper"> <Style TargetType="{x:Type UserControl}" x:Key="WizardPageControl" x:Name="WizardPageControl"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type UserControl}"> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="10" /> <ColumnDefinition Width="475" /> <ColumnDefinition Width="10" /> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition Height="10" /> <RowDefinition Height="410"/> <RowDefinition Height="50" /> <RowDefinition Height="10" /> </Grid.RowDefinitions> <StackPanel Orientation="Vertical" Name="MainContent" Grid.Row="1" Grid.Column="1"> <ContentPresenter Content="{TemplateBinding Content}"/> </StackPanel> <StackPanel Grid.Column="1" Grid.Row="2" Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Bottom" Margin="0,0,0,10" Height="30"> <Button Name="BackButton" Width="50" xml:space="preserve">&lt; _Back</Button> <Button Name="NextButton" Width="50" Margin="10,0,0,0" xml:space="preserve" IsDefault="True">_Next &gt;</Button> <Button Name="CancelButton" Width="50" Margin="10,0,0,0" IsCancel="True">_Cancel</Button> <Button Name="FinishButton" IsEnabled="True" Width="50" Margin="10,0,0,0">_Finish</Button> </StackPanel> </Grid> </ControlTemplate> </Setter.Value> </Setter> </Style> </ResourceDictionary> <Application xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Application.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="Resources\WizardPageControl.xaml" /> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </Application.Resources> </Application> <UserControl x:Class="Werp.MigrationHelper.WizardPageControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:local="clr-namespace:Werp.MigrationHelper" mc:Ignorable="d"> </UserControl> Then I try to use it: <PageFunction xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:Werp.MigrationHelper" x:Class="Werp.MigrationHelper.WizardPage1" x:TypeArguments="local:WizardResult" KeepAlive="True" WindowTitle="Wizard Page 1" > <local:WizardPageControl Style="{StaticResource ResourceKey=WizardPageControl}"> <local:WizardPageControl.Content> qweqweqweqweq </local:WizardPageControl.Content> </local:WizardPageControl> </PageFunction> The VS designer show everything Ok, but in runtime i get System.Windows.Markup.XamlParseException occurred Message='Provide value on 'System.Windows.StaticResourceExtension' threw an exception.' Line number '4' and line position '5'. Source=PresentationFramework LineNumber=4 LinePosition=5 StackTrace: at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri) at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri) at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream) at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator) at Werp.MigrationHelper.WizardPage1.InitializeComponent() in d:\Home\Docs\Visual Studio 2008\Projects\csharp\wizardpage1.xaml:line 1 at Werp.MigrationHelper.WizardPage1..ctor(WizardData wizardData) in D:\home\Docs\Visual Studio 2008\Projects\csharp\WizardPage1.xaml.cs:line 12 InnerException: Message=Cannot find resource named 'WizardPageControl'. Resource names are case sensitive. Source=PresentationFramework StackTrace: at System.Windows.StaticResourceExtension.ProvideValue(IServiceProvider serviceProvider) at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CallProvideValue(MarkupExtension me, IServiceProvider serviceProvider) InnerException: Whats the prolem??

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• Disable selected automated tests at runtime

  - by squig

  Is is posable to disable selected automated tests at runtime? I'm using VSTS and rhino mocks and have some intergation tests that require an external dependancy to be installed (MQ). Not all the developers on my team have this installed. Currently all the tests that require MQ inherit from a base class that checks if MQ is installed and if is not sets the test result to inconclusive. This works as it stops the tests from running, but marks the test run as unsuccseessful and can hide other failures. Any ideas?

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• Crystal Reports and Report Viewer runtime question

  - by Spooky2010

  Using vs2008 c#. Howdy, Ive got an application where im trying to decide if i should use the Crystal reports or the Report viewer that comes with the visual studio install. My issue is that while it will run fine on my development machine, a lot of the machines the application will be deployed to in remote locations WONT have the runtime for either crystal reports or the report viewer installed. therefore if i build an application using either of these, and prevent user access to the reports only on the machines that do NOT have the runtimes, can the application run ok, or should i expect crazy errors on install and such Any advice appreciated.

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• Reflection and changing a variables type at runtime?

  - by james-west

  Hi I'm trying to create an object Of a specific type. I've got the following code, but it fails because it can't cast the new table object to the one that is already defined. I need table to start of an IEnumerable type so I can't declare is an object. Public sub getTable(ByVal t as Type) Dim table As Table(Of Object) Dim tableType As Type = GetType(Table(Of )).MakeGenericType(t) table = FormatterServices.GetUninitializedObject(tableType) End sub So in short - is there a way of changing a variable type at runtime? (or a better way of doing what I'm doing) Thanks in advance. James

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• add ms ajax accordion pane at runtime loses previous pane issue

  - by Chris Conway

  I have an AjaxControlToolkit accordion control that i'm trying to load panes at runtime. When I click a button inside a listview, it should add a new pane to the accordion control. Here is the code that adds the pane in the onitemcommand event within the listview var pane = new AccordionPane { ID = key }; pane.HeaderContainer.Controls.Add(new LiteralControl(label.Text)); pane.ContentContainer.Controls.Add(LoadControl("~/UserControls/Covers/" + e.CommandArgument + ".ascx")); accordion.Panes.Add(pane); And this will successfully show a webcontrol inside the accordion control. But when I click on another button in the listview, the accordion is reset and it only shows the new pane instead of appending a new pane. Is there any way to keep the previous pane visible across postbacks like this? By the way, each of the webcontrols that are loaded in the accordion have input fields that will need to be persisted across postbacks as well. thanks!

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• Change My.Settings ConnectionString in runtime?

  - by Sultanen

  I have a ClickOnce deployment where i have a INI-settings file on the network file with "global" settings that is supposed to affect the program on all client computers. The problem i have is that i whant to have the Database connectionString stored in this INI file and have it read and stored in the My.Settings ConnectionString at program startup. How do i do this? The ConnectionString setting is Application scoped and therefore Read-Only, if i try to set it by My.Settings("ConnectionString") = "Source=server;Initial Catalog=database;Integrated Security=True" I get a runtime error: An error occurred creating the form. See Exception.InnerException for details. The error is: The type initializer for 'DB_lib.DB_LINQ' threw an exception. [EDIT] I got rid of the error by using the My.Settings("ConnectionString") = "Source=server;Initial Catalog=database;Integrated Security=True" in another place then the the eventtriggerd settingsLoaded method i created.. The problem is that even though the connectionstring semes to be the right, the program still connects to the "default" database that is typed in to the app.config file??

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• Function with missing return value, behavior at runtime

  - by nabulke

  As expected, the compiler (VisualStudio 2008) will give a warning warning C4715: 'doSomethingWith' : not all control paths return a value when compiling the following code: int doSomethingWith(int value) { int returnValue = 3; bool condition = false; if(condition) // returnValue += value; // DOH return returnValue; } int main(int argc, char* argv[]) { int foo = 10; int result = doSomethingWith(foo); return 0; } But the program runs just fine. The return value of function doSomethingWith() is 0. Is is just undefined behavior, or is there a certain rule how the result value is created/computed at runtime. What happens with non-POD datatypes as return value?

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• Strange: Planner takes decision with lower cost, but (very) query long runtime

  - by S38

  Facts: PGSQL 8.4.2, Linux I make use of table inheritance Each Table contains 3 million rows Indexes on joining columns are set Table statistics (analyze, vacuum analyze) are up-to-date Only used table is "node" with varios partitioned sub-tables Recursive query (pg = 8.4) Now here is the explained query: WITH RECURSIVE rows AS ( SELECT * FROM ( SELECT r.id, r.set, r.parent, r.masterid FROM d_storage.node_dataset r WHERE masterid = 3533933 ) q UNION ALL SELECT * FROM ( SELECT c.id, c.set, c.parent, r.masterid FROM rows r JOIN a_storage.node c ON c.parent = r.id ) q ) SELECT r.masterid, r.id AS nodeid FROM rows r QUERY PLAN ----------------------------------------------------------------------------------------------------------------------------------------------------------------- CTE Scan on rows r (cost=2742105.92..2862119.94 rows=6000701 width=16) (actual time=0.033..172111.204 rows=4 loops=1) CTE rows -> Recursive Union (cost=0.00..2742105.92 rows=6000701 width=28) (actual time=0.029..172111.183 rows=4 loops=1) -> Index Scan using node_dataset_masterid on node_dataset r (cost=0.00..8.60 rows=1 width=28) (actual time=0.025..0.027 rows=1 loops=1) Index Cond: (masterid = 3533933) -> Hash Join (cost=0.33..262208.33 rows=600070 width=28) (actual time=40628.371..57370.361 rows=1 loops=3) Hash Cond: (c.parent = r.id) -> Append (cost=0.00..211202.04 rows=12001404 width=20) (actual time=0.011..46365.669 rows=12000004 loops=3) -> Seq Scan on node c (cost=0.00..24.00 rows=1400 width=20) (actual time=0.002..0.002 rows=0 loops=3) -> Seq Scan on node_dataset c (cost=0.00..55001.01 rows=3000001 width=20) (actual time=0.007..3426.593 rows=3000001 loops=3) -> Seq Scan on node_stammdaten c (cost=0.00..52059.01 rows=3000001 width=20) (actual time=0.008..9049.189 rows=3000001 loops=3) -> Seq Scan on node_stammdaten_adresse c (cost=0.00..52059.01 rows=3000001 width=20) (actual time=3.455..8381.725 rows=3000001 loops=3) -> Seq Scan on node_testdaten c (cost=0.00..52059.01 rows=3000001 width=20) (actual time=1.810..5259.178 rows=3000001 loops=3) -> Hash (cost=0.20..0.20 rows=10 width=16) (actual time=0.010..0.010 rows=1 loops=3) -> WorkTable Scan on rows r (cost=0.00..0.20 rows=10 width=16) (actual time=0.002..0.004 rows=1 loops=3) Total runtime: 172111.371 ms (16 rows) (END) So far so bad, the planner decides to choose hash joins (good) but no indexes (bad). Now after doing the following: SET enable_hashjoins TO false; The explained query looks like that: QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CTE Scan on rows r (cost=15198247.00..15318261.02 rows=6000701 width=16) (actual time=0.038..49.221 rows=4 loops=1) CTE rows -> Recursive Union (cost=0.00..15198247.00 rows=6000701 width=28) (actual time=0.032..49.201 rows=4 loops=1) -> Index Scan using node_dataset_masterid on node_dataset r (cost=0.00..8.60 rows=1 width=28) (actual time=0.028..0.031 rows=1 loops=1) Index Cond: (masterid = 3533933) -> Nested Loop (cost=0.00..1507822.44 rows=600070 width=28) (actual time=10.384..16.382 rows=1 loops=3) Join Filter: (r.id = c.parent) -> WorkTable Scan on rows r (cost=0.00..0.20 rows=10 width=16) (actual time=0.001..0.003 rows=1 loops=3) -> Append (cost=0.00..113264.67 rows=3001404 width=20) (actual time=8.546..12.268 rows=1 loops=4) -> Seq Scan on node c (cost=0.00..24.00 rows=1400 width=20) (actual time=0.001..0.001 rows=0 loops=4) -> Bitmap Heap Scan on node_dataset c (cost=58213.87..113214.88 rows=3000001 width=20) (actual time=1.906..1.906 rows=0 loops=4) Recheck Cond: (c.parent = r.id) -> Bitmap Index Scan on node_dataset_parent (cost=0.00..57463.87 rows=3000001 width=0) (actual time=1.903..1.903 rows=0 loops=4) Index Cond: (c.parent = r.id) -> Index Scan using node_stammdaten_parent on node_stammdaten c (cost=0.00..8.60 rows=1 width=20) (actual time=3.272..3.273 rows=0 loops=4) Index Cond: (c.parent = r.id) -> Index Scan using node_stammdaten_adresse_parent on node_stammdaten_adresse c (cost=0.00..8.60 rows=1 width=20) (actual time=4.333..4.333 rows=0 loops=4) Index Cond: (c.parent = r.id) -> Index Scan using node_testdaten_parent on node_testdaten c (cost=0.00..8.60 rows=1 width=20) (actual time=2.745..2.746 rows=0 loops=4) Index Cond: (c.parent = r.id) Total runtime: 49.349 ms (21 rows) (END) - incredibly faster, because indexes were used. Notice: Cost of the second query ist somewhat higher than for the first query. So the main question is: Why does the planner make the first decision, instead of the second? Also interesing: Via SET enable_seqscan TO false; i temp. disabled seq scans. Than the planner used indexes and hash joins, and the query still was slow. So the problem seems to be the hash join. Maybe someone can help in this confusing situation? thx, R.

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• How to populating Ontology at runtime?

  - by Chan

  Hi, I have a configuration file with a lot of data like sensor locations, type, rules for activating devices etc. Basically related to a pervasive system. I plan to design an ontology for this domain. The doubt in my mind is how should I populate the ontology with the information in the configuration file, as the configuration files are going to change every now and then. Earlier I was planning to use XML, so I can just read the configuration file at runtime and create an XML as per the XSD. Do we use the same technique for Ontologies? If yes then what is the format of the populated ontology? Thanks Chan

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• How to populate an ontology at runtime?

  - by Chan

  I have a configuration file with a lot of data like sensor locations, type, rules for activating devices etc. Basically related to a pervasive system. I plan to design an ontology for this domain. The doubt in my mind is how should I populate the ontology with the information in the configuration file, as the configuration files are going to change every now and then. Earlier I was planning to use XML, so I can just read the configuration file at runtime and create an XML as per the XSD. Do we use the same technique for Ontologies? If yes then what is the format of the populated ontology? Thanks Chan

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• runtime loading of ValidateAntiForgeryToken Salt value

  - by p.campbell

  Consider an ASP.NET MVC application using the Salt parameter in the [ValidateAntiForgeryToken] directive. The scenario is such that the app will be used by many customers. It's not terribly desirable to have the Salt known at compile time. The current strategy is to locate the Salt value in the web.config. [ValidateAntiForgeryToken(Salt = Config.AppSalt)] //Config.AppSalt is a static property that reads the web.config. This leads to a compile-time exception suggesting that the Salt must be a const at compile time. An attribute argument must be a constant expression, typeof expression or array creation expression of an attribute parameter type How can I modify the application to allow for a runtime loading of the Salt so that the app doesn't have to be re-salted and recompiled for each customer? Consider that the Salt won't change frequently, if at all, thereby removing the possibility of invalidating form

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• Generic List created at runtime

  - by Perry

  Hi... i neeed something like this in C#.. have list in class but decide what will be in list during runtime class A { List data; Type typeOfDataInList; } public void FillData(DataTyp[] data) where DataTyp : struct { A a = new A(); A.vListuBudouDataTypu = typeof(DataTyp); A.data = new List(); A.AddRange(data); } Is this possible to do something like this ?

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• asp.net databinding string is passed to function but runtime occurs

  - by rod

  Hi All, I'm using a code-behind function (called TestFx) in my binding expression. I'm passing a string and the function accepts a string but I still get a runtime error saying invalid args. But if I change the method to accept an object and inspect the value, "it's a string!" Can someone please explain? -rod ProductDescription: <asp:Label ID="ProductDescriptionLabel" runat="server" Text='<%# TestFx(Eval("ProductDescription")) %>' /> <br />

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• Linq to SQL Where clause based on field selected at runtime

  - by robasaurus

  I'm trying to create a simple reusable search using LINQ to SQL. I pass in a list of words entered in a search box. The results are then filtered based on this criteria. private IQueryable<User> BasicNameSearch(IQueryable<User> usersToSearch, ICollection<string> individualWordsFromSearch) { return usersToSearch .Where(user => individualWordsFromSearch.Contains(user.Forename.ToLower()) || individualWordsFromSearch.Contains(user.Surname.ToLower())); } Now I want this same search functionality on a different datasource and want to dynamically select the fields to apply the search to. For instance instead of IQueryable of Users I may have an IQueryable of Cars and instead of firstname and surname the search goes off Make and Model. Basically the goal is to reuse the search logic by dynamically selecting what to search on at runtime.

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