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• How does the momentum/inertial scroll work with the Magic Mouse on NSScrollView?

  - by jbrennan

  When you scroll with the newer Apple Magic Mouse (at least on 10.6, I can't confirm any previous Mac OS) you get inertial scroll like scrolling on iPhone (that is, after a flick of the finger to scroll, it doesn't abruptly stop, but instead gradually slows down). This behaviour is "for free" with all NSScrollViews, it would appear. There are exceptional cases, such as Tweetie for Mac (I've heard Tweetie was written with a custom Table View class that works akin to how UITableView works on iPhone). My question is, how do the scroll views know how to do this inertial scrolling? My guess is the mouse [driver] repeatedly sends scroll events with a dampening scroll magnitude (or something like that) over the scroll period. But I'm not really sure how it works. I am having some scrolling problems in my scrollview class and I'm trying to figure out why (obviously we don't have the source code to Tweetie to see why it doesn't get the proper scrolling), but just trying to better understand how it works in order to fix my own problems.

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• How should I implement lazy session creation in PHP?

  - by Adam Franco

  By default, PHP's session handling mechanisms set a session cookie header and store a session even if there is no data in the session. If no data is set in the session then I don't want a Set-Cookie header sent to the client in the response and I don't want an empty session record stored on the server. If data is added to $_SESSION, then the normal behavior should continue. My goal is to implement lazy session creation behavior of the sort that Drupal 7 and Pressflow where no session is stored (or session cookie header sent) unless data is added to the $_SESSION array during application execution. The point of this behavior is to allow reverse proxies such as Varnish to cache and serve anonymous traffic while letting authenticated requests pass through to Apache/PHP. Varnish (or another proxy-server) is configured to pass through any requests without cookies, assuming correctly that if a cookie exists then the request is for a particular client. I have ported the session handling code from Pressflow that uses session_set_save_handler() and overrides the implementation of session_write() to check for data in the $_SESSION array before saving and will write this up as library and add an answer here if this is the best/only route to take. My Question: While I can implement a fully custom session_set_save_handler() system, is there an easier way to get this lazy session creation behavior in a relatively generic way that would be transparent to most applications?

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• best way to statistically detect anomalies in data

  - by reinier

  Hi, our webapp collects huge amount of data about user actions, network business, database load, etc etc etc All data is stored in warehouses and we have quite a lot of interesting views on this data. if something odd happens chances are, it shows up somewhere in the data. However, to manually detect if something out of the ordinary is going on, one has to continually look through this data, and look for oddities. My question: what is the best way to detect changes in dynamic data which can be seen as 'out of the ordinary'. Are bayesan filters (I've seen these mentioned when reading about spam detection) the way to go? Any pointers would be great! EDIT: To clarify the data for example shows a daily curve of database load. This curve typically looks similar to the curve from yesterday In time this curve might change slowly. It would be nice that if the curve from day to day changes say within some perimeters, a warning could go off. R

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• Three Silverlight 4 issues

  - by Muhammad Jamal Shaikh

  Silverlight version : 4 Silverlight patter :MVVM Visual Studio template :Silverlight navigation application How do I block main navigation on (mainpage.xaml) as in any silverlight navigation application and block page's controls ( i.e whichever page is it in ) during async webservice calls? Any best practices? How do I deal with the browser's forward and backward buttons, specially during async calls? How do I deal with dialogs on the views ( e.g when using a childwindow to select a color). How should the color's picker control hex be communicated to the viewmodel?

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• Is there an equivalence to CDOSYS AutoGenerateTextBody in .NET

  - by AnthonyWJones

  I'm porting some VBScript code which generates emails using the standard CDOSYS Message object. The Message oject has a property AutoGenerateTextBody which when true will cause it to automatically create the TextBody property value when you assign HTML to the HTMLBody property. Hence creating the typical text/plain and text/html alternatives in the message body. However .NET appears to be missing this function. The MailMessage object does have the ability to create alternative views but there doesn't appear to be a way to easily create the text body content from the HTML content. I'm not necessarily looking for an auto-magic option but I do need a solution to taking what is an HTML string and converting it to a reasonable plain text representation. Just dropping all the HTML markup doesn't cut it. Is there a tool buried somewhere in the existing .NET framework that can do this?

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• I keep Getting KeyError: 'tried' Whenever I Tried to Run Django Dev Server from Remote Machine

  - by Spikie

  I am running django on python2.6.1, and did start the django web server like this manage.py runserver 192.0.0.1:8000 then tried to connect to the django dev web server on http://192.0.0.1:8000/ keep getting this message on the remote computer Traceback (most recent call last): File "C:\Python26\Lib\site-packages\django\core\servers\basehttp.py", line 279, in run self.result = application(self.environ, self.start_response) File "C:\Python26\Lib\site-packages\django\core\servers\basehttp.py", line 651, in call return self.application(environ, start_response) File "C:\Python26\lib\site-packages\django\core\handlers\wsgi.py", line 241, in call response = self.get_response(request) File "C:\Python26\lib\site-packages\django\core\handlers\base.py", line 115, in get_response return debug.technical_404_response(request, e) File "C:\Python26\Lib\site-packages\django\views\debug.py", line 247, in technical_404_response tried = exception.args[0]['tried'] KeyError: 'tried' what i am doing wrong ? it seen to work ok if i run http://192.0.0.1:8000/ on the computer that runs the Django web server and have that ip 192.0.0.1:8000

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• How Can I Add a New Command to a Control's Event

  - by Chris

  Hi, thanks for taking a look at this question. I have been building an application (VB/WPF) following Josh Smith's example of an MVVM pattern: Click here to view My Views have Controls which trigger a Command upon an event, such as a button click and these are bound to properties in the ViewModel. My ViewModel exposes properties of type ICommand which invoke the appropriate methods. This has worked well, until now! I now want to use a Thumb Control to allow a user to move an object within a Canvas. I don't believe that the Thumb has a Command capability 'out of the box'. A Thumb raises a 'DragDelta' event when being moved. So my question is as follows: How do I extend a Control's capability to issue a Command upon an event please? I wish to issue a new Command, let's say 'onDragDelta' so that I can bind it to a property in my ViewModel just like my Buttons. Thank you very much

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• Gmail-like labelling system

  - by Dimitris

  Hi I am looking into a number of ways to implement a labelling system similar to the one in Gmail. Basically I have a Resource at the lowest level and I would like to provide a number of organisational groupings for that resource in the form of labels. If anyone has implemented something like that I would like to hear your views. My idea is to have within the Resource instance a List<Label>. I need to have an efficient mechanism in order to do very fast searches based on the labels or based on the resources. Thanks Dimitris

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• FlexUnit - howto check label text

  - by Maik

  I am trying to automatically verify certain conventions, such as label/table column header text (Sentence Case, use of colons, etc). It would be nice if there was a way in FlexUnit, or other means, to Iterate over all views in the app Get all titles, labels, column headers Run some pattern checks and fail where needed. Does anyone have a suggestion on what the best way would be to achieve that? I suppose I could do this on a code level on the MXML files, but it would be nicer if it could be integrated into the overall unit test suits. Thanks for any suggestions

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• UINavigationController Right button

  I am unable to set any property of parentController (which is always a UINavigationController in my case) from child views. e.g. I want to add a button on the navigation bar using following code: UINavigationController* parentController = (UINavigationController)self.parentViewController; UIBarButtonItem *addButton = [[[UIBarButtonItem alloc] initWithTitle:@"Something" style:UIBarButtonItemStyleBordered target:self action:@selector(doSomething)] autorelease]; [_parentController.navigationItem setRightBarButtonItem:addButton animated:YES]; This code runs perfectly without errors but I can't see any button added to the navigation bar. Thanks in advance.

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• Can Automapper populate a strongly typed object from the data in a NameValueCollection?

  - by Seth Petry-Johnson

  Can Automapper map values from a NameValueCollection onto an object, where target.Foo receives the value stored in the collection under the "Foo" key? I have a business object that stores some data in named properties and other data in a property bag. Different views make different assumptions about the data in the property bag, which I capture in page-specific view models. I want to use AutoMapper to map both the "inherent" attributes (the ones that always exist) as well as the "dynamic" attributes (the ones that vary per view and may or may not exist).

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• Decoration View *above* cells in UICollectionView

  - by Dhiraj Gupta

  I've got a decoration view showing the way I want, in my UICollectionView. The position and size is right. The decoration view stays at the frame I'm setting for it in my layout. But, I want the decoration view to be above the cells, not below them. I tried setting the zIndex property on the UICollectionViewLayoutAttributes for the decoration view, but this has no effect - I tried logging out the zindex of the cells, and they're all returning 0, and my decoration view's zIndex is set to 20. I'm guessing having decoration views above the cells is not supported, at least in UICollectionViewFlowLayout? Someone please confirm this, thanks! In the meantime, I'm going back to having a custom UIView subclass as a subview in the parent controller of the collection view and laying out the frame of it in the - (void) viewWillLayoutSubviews() method.

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• Android ScrollView jumps around when setting child visibility to View.GONE

  - by Mike

  I have a ScrollView that contains an number of other views (TextViews, ImageViews, etc.). The ScrollView is taller than the screen. I have an AsyncTask that updates the children of the ScrollView based on an http response. I've discovered an interesting behavior that I can't figure out how to work around. If I set any of the children's visibilities to View.INVISIBLE as part of the AsyncTask.onPostExecute(), everything works fine. However, if I set any of the children's visibilities to View.GONE, the ScrollView jumps down from the top when onPostExecute() is called. Exactly how far seems to vary. I'm guessing that re-laying out the ScrollView is causing it to scroll away from the top for some reason. So the question is: is there a way to either prevent or work around this behavior? PS. Using ScrollView.jump(FOCUS_UP) as a workaround isn't ideal since that'll force the user to the top even if they had intended to scroll down.

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• How to handle localization in javascript files?

  - by Arnis L.

  I want javascript to be separated from views. Got requirement to implement localization for simple image button generated by JS: <img src="..." onclick="..." title="Close" /> What's the best technique to localize title of it? P.s. Found a solution by Ayende. This is the right direction. Edit: I got Localization helper class which provides Controller.Resource('foo') extension method. Thinking about to extend it (helper) so it could return all JavaScript resources (from "ClientSideResources" subfolder in App_LocalResources) for specified controller by it's name. Then - call it in BaseController, add it to ViewData and render it in Layout. Would that be a good idea?

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• IPhone UIView:Is it possible to enable userinteraction only on subviews?

  - by Syg

  Hi guys, I created a viewcontroller that displays a button which is used to slide a view onto the screen. The idea is to place for instance three such viewcontrollers onscreen, resulting in three buttons at the bottom of the screen providing navigation. The viewcontrollers get stacked, so to the top one is now overlaying the other views and therefore the other buttons. Only the top viewcontroller's button is working in this situation, where I would like all three of them to be clickable. I tried disabling userinteraction on the view and enabling it on the buttons only, but it looks like the superview settings overrule the subview settings. Any ideas?

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• What tools are people using to measure SQL Server database performance?

  - by Paul McLoughlin

  I've experimented with a number of techniques for monitoring the health of our SQL Servers, ranging from using the Management Data Warehouse functionality built into SQL Server 2008, through other commercial products such as Confio Ignite 8 and also of course rolling my own solution using perfmon, performance counters and collecting of various information from the dynamic management views and functions. What I am finding is that whilst each of these approaches has its own associated strengths, they all have associated weaknesses too. I feel that to actually get people within the organisation to take the monitoring of SQL Server performance seriously whatever solution we roll out has to be very simple and quick to use, must provide some form of a dashboard, and the act of monitoring must have minimal impact on the production databases (and perhaps even more importantly, it must be possible to prove that this is the case). So I'm interested to hear what others are using for this task? Any recommendations?

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• C# ProgressBar design pattern

  - by MadSeb

  Hi, I'm working on a database upgrader application. The upgrader updates the schema of a database ( adds new columns, renames columns , adds new tables, new views to an existing database by executing SQL statements ). When a user wants to upgrade from version 1.0 to 2.0 , "Upgrader" objects are taken from an object factory and the "Execute" method of each "Upgrader" is called. The GUI of the application has a progress bar and each time an upgrader object performs a SQL statement the progress bar gets incremented. while (!version.Equal(CurrentVersion)) { IUpgrader myUpgrader = UpgraderFactory.GetUpgrader(version); myUpgrader.Execute(UpgradedFile,progressbar); version.Increment(); } My question is very simple : how should the upgrader object communicate with the progressbar. In the code above, the upgrader object is given direct access to the progressbar but I'm wondering if some better way of doing this or better design pattern exists. Regards, Seb

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• Problems in php coding

  - by anwar

  Hi there everyone im new to PHP and Joomla and I have developed a component in Joomla but my code is giving me errors. I have tried to solve the problem but I’am unable to solve it. So can anyone suggest me what is the problem with my code? Thanks in advance. Here are my two files: 1st view.html.php defined('_JEXEC') or die('=;)'); jimport('joomla.application.component.view'); class namnamViewlistrestaurant extends JView { function display($tpl = null) { $item = 'item'; RestUser::RestrictDirectAccess(); //-- Custom css JHTML::stylesheet( 'style.css', 'components/com_namnam/assets/css/' ); $cuisine=Lookups::getLookup('cuisine'); $lists['cuisine'] = JHTML::_('select.genericlist', $cuisine, 'idcuisine[]', 'class="inputbox" size="7"', 'value', 'text', $item->idcuisine); $category=Lookups::getLookup('restcategory'); $lists['category'] = JHTML::_('select.genericlist', $category, 'idcategory[]', 'class="inputbox" multiple="multiple" size="7"', 'value', 'text', $item->idcategory); $items = & $this->get('Data'); $pagination =& $this->get('Pagination'); $lists = & $this->get('List'); $this->assignRef('items', $items); $this->assignRef('pagination', $pagination); $this->assignRef('lists', $lists); parent::display($tpl); }//function }//class And 2nd is listrestaurant.php defined('_JEXEC') or die('=;)'); jimport('joomla.application.component.model'); class namnamModellistrestaurant extends JModel { var $_data; var $_total = null; var $_pagination = null; function __construct() { parent::__construct(); global $mainframe, $option; $limit = $mainframe->getUserStateFromRequest( 'global.list.limit', 'limit', $mainframe->getCfg('list_limit'), 'int' ); $limitstart = $mainframe->getUserStateFromRequest( $option.'.limitstart', 'limitstart', 0, 'int' ); $limitstart = ($limit != 0 ? (floor($limitstart / $limit) * $limit) : 0); $this->setState('limit', $limit); $this->setState('limitstart', $limitstart); } function _buildQuery() { $where = array(); $where[]=" idowner=".RestUser::getUserID()." "; if ($this->search) { $where[] = 'LOWER(name) LIKE \''. $this->search. '\''; } $where =( count($where) ) ? ' WHERE ' . implode( ' AND ', $where ) : ''; $orderby = ''; #_ECR_MAT_FILTER_MODEL1_ if (($this->filter_order) && ($this->filter_order_Dir)) { $orderby = ' ORDER BY '. $this->filter_order .' '. $this->filter_order_Dir; } $this->_query = ' SELECT *' . ' FROM #__namnam_restaurants ' . $where . $orderby ; return $this->_query; } function getData() { if (empty($this->_data)) { $query = $this->_buildQuery(); $this->_data = $this->_getList($query, $this->getState('limitstart'), $this->getState('limit')); } return $this->_data; } function getList() { // table ordering $lists['order_Dir'] = $this->filter_order_Dir; $lists['order'] = $this->filter_order; // search filter $lists['search']= $this->search; return $lists; } function getTotal() { // Load the content if it doesn't already exist if (empty($this->_total)) { $query = $this->_buildQuery(); $this->_total = $this->_getListCount($query); } return $this->_total; } function getPagination() { // Load the content if it doesn't already exist if (empty($this->_pagination)) { jimport('joomla.html.pagination'); $this->_pagination = new JPagination($this->getTotal(), $this->getState('limitstart'), $this->getState('limit') ); } return $this->_pagination; } }//class And the errors are: Notice: Trying to get property of non-object in C:\wamp\www\namnam.com\components\com_namnam\views\listrestaurant\view.html.php on line 26 Notice: Trying to get property of non-object in C:\wamp\www\namnam.com\components\com_namnam\views\listrestaurant\view.html.php on line 29 Notice: Undefined property: namnamModellistrestaurant::$search in C:\wamp\www\namnam.com\components\com_namnam\models\listrestaurant.php on line 38 Notice: Undefined property: namnamModellistrestaurant::$filter_order in C:\wamp\www\namnam.com\components\com_namnam\models\listrestaurant.php on line 48 Notice: Undefined property: namnamModellistrestaurant::$search in C:\wamp\www\namnam.com\components\com_namnam\models\listrestaurant.php on line 38 Notice: Undefined property: namnamModellistrestaurant::$filter_order in C:\wamp\www\namnam.com\components\com_namnam\models\listrestaurant.php on line 48 Notice: Undefined property: namnamModellistrestaurant::$filter_order_Dir in C:\wamp\www\namnam.com\components\com_namnam\models\listrestaurant.php on line 76 Notice: Undefined property: namnamModellistrestaurant::$filter_order in C:\wamp\www\namnam.com\components\com_namnam\models\listrestaurant.php on line 77 Notice: Undefined property: namnamModellistrestaurant::$search in C:\wamp\www\namnam.com\components\com_namnam\models\listrestaurant.php on line 80

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• Generate links for routes with non-parameter url segments on ASP.NET MVC 2

  - by spapaseit

  I have a route defined with several hardcoded (non-parameter) segments: routes.MapRoute(null, "suggestion/list/by/{tag}", new { controller = "Suggestion", action = "List", tag = UrlParameter.Optional }); Suppose I'm in the Index view of SuggestionController, which has a Suggestion object for Model, how can I create a link that matches that route? I'd rather use one of the provided helpers and keep the route name as null in order to avoid hard-coding to much on my views, but I can't figure out how to user these non-parameter segments in Html.ActionLink or RouteLink methods. I've even tried to render the link using plain ol' html <a href="/suggestion/list/by/<%=Model.Tag %>"><%=Model.Tag %></a> but this somehow didn't match the route either. There's probably a very simple solution and I might be over-complicating things in mi mind, but I'm at a loss. Any ideas? Thanks in advance.

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• How do you use kate? Tips/Tricks/Workflow

  - by Roman A. Taycher

  We all seen a bunch of these? Mostly for IDE's but also for vim and emacs. Kate is (only) a text editor (an awesome one) but it has a ton of options plus a number of plugins, so its hard to know all of it well. How do use the Kate text editor? Please share your workflow and help me and others learn some of the cool tricks you use. I'll start I use the built in terminal a lot opening files quickly, and using it as an enhanced haskell repl with ghci (since ghci doesn't allow you all to just put in all kinds of haskell code). Also use split views to quickly compare files (especially different versions of the same file). Also the auto-complete maybe simple(more use for saving typing time then remembering functions) but it works really well for that. Also if You highlight something and hit a start [/{/( it puts it in between brackets rather then replacing it with a bracket(why the hell do a lot of IDEs not have this feature).

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• Displaying UserControls based on the type a TreeView selection is bound to

  - by Ray Wenderlich

  I am making an app in WPF in a style similar to Windows Explorer, with a TreeView on the left and a pane on the right. I want the contents of the right pane to change depending on the type of the selected element in the TreeView. For example, say the top level in the Tree View contains objects of class "A", and if you expand the "A" object you'll see a list of "B" objects as children of the "A" object. If the "A" object is selected, I want the right pane to show a user control for "A", and if "B" is selected I want the right pane to show a user control for "B". I've currently got this working by: setting up the TreeView with one HierarchialDataTemplate per type adding all the UserControls to the right pane, but collapsed implementing SelectedItemChanged on the TreeView, and setting the appropriate usercontrol to visible and the others to collapsed. However, I'm sure there's a better/more elegant way to switch out the views based on the type the selection is bound to, perhaps by making more use of data binding... any ideas?

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• UIAlertView crashing on undocumented method

  - by morticae

  Our app has been crashing with a frequency of roughly 1 in 1,500 launches due to a bug that is proving elusive. The relevant portion of the stack trace is included. It's being fired as a callback so I have no reference for where it's occurring in my own code. It looks like what's going on is there is a UIViewAnimationState object that is calling UIAlertView's private method (_popoutAnimationDidStop:finished:). Only problem is, it appears the UIAlertView has been dealloced by this point. I don't do anything weird with alert views. I throw them up, and I wait for user input. They are all shown before being released. Anyone encountered this? At this point, I'm leaning toward it being an Apple bug. Thread 0 Crashed: 0 libobjc.A.dylib 0x3138cec0 objc_msgSend + 24 1 UIKit 0x326258c4 -[UIAlertView(Private) _popoutAnimationDidStop:finished:] 2 UIKit 0x324fad70 -[UIViewAnimationState sendDelegateAnimationDidStop:finished:] 3 UIKit 0x324fac08 -[UIViewAnimationState animationDidStop:finished:] 4 QuartzCore 0x311db05c run_animation_cal lbacks

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• Create iPhone app programmatically, in its entirety

  - by miorel

  I recently became interested in iPhone app development, so I've been looking at online tutorials, and also reading a book, trying out the examples as I go along. I'm getting better, but one of the things I still find quite annoying about the usual development model is that I really have no idea what the SDK is really doing behind the scenes to make the app "work" because Apple protects me from this. For example, when I make connections on interface builder, this presumably corresponds to code being generated somewhere... Where that code is and what it does and how it works are not obvious (to me). So I'm wondering, is it possible to create an iPhone app entirely programmatically? That is, have execution start in some main method, which will then programmatically create any views, register event listeners, etc. And if yes, what are some good resources for something like this?

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• How to SET ARITHABORT ON for connections in Linq To SQL

  - by Laurence

  By default, the SQL connection option ARITHABORT is OFF for OLEDB connections, which I assume Linq To SQL is using. However I need it to be ON. The reason is that my DB contains some indexed views, and any insert/update/delete operations against tables that are part of an indexed view fail if the connection does not have ARITHABORT ON. Even selects against the indexed view itself fail if the WITH(NOEXPAND) hint is used (which you have to use in SQL Standard Edition to get the performance benefit of the indexed view). Is there somewhere in the data context I can specify I want this option ON? Or somewhere in code I can do it?? I have managed a clumsy workaround, but I don't like it .... I have to create a stored procedure for every select/insert/update/delete operation, and in this proc first run SET ARITHABORT ON, then exec another proc which contains the actual select/insert/update/delete. In other words the first proc is just a wrapper for the second. It doesn't work to just put SET ARITHABORT ON above the select/insert/update/delete code.

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• Sql server indexed view

  - by Jose

  OK, I'm confused about sql server indexed views(using 2008) I've got an indexed view called AssignmentDetail when I look at the execution plan for select * from AssignmentDetail it shows the execution plan of all the underlying indexes of all the other tables that the indexed view is supposed to abstract away. I would think that the execution plan woul simply be an clustered index scan of PK_AssignmentDetail(the name of the clustered index for my view) but it doesn't. There seems to be no performance gain with this indexed view what am I supposed to do? Should I also create a non-clustered index with all of the columns so that it doesn't have to hit all the other indexes? Any insight would be greatly appreciated

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