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• Slow in the Application but Fast in SQL Server Management Studio - from Erland

  - by Greg Low

  Our MVP buddy Erland Sommarskog doesn't post articles that often but when he does, you should read them. His latest post is here: http://www.sommarskog.se/query-plan-mysteries.html It talks about why a query might be slow when sent from an application but fast when you execute it in SSMS. But it covers way more than that. There is a great deal of good info on how queries are executed and query plans generated. Highly recommended!...(read more)

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• SQL Server Maintenance Utilities Update for SQL Server 2008 R2

  - by Greg Low

  Great to see that our friend Ola Hallengren has updated his maintenance utility scripts to deal with SQL Server 2008 R2. These scripts are highly regarded, particularly given the price: free ! You'll find them here: http://ola.hallengren.com/Versions.html Ola noted that the main change from 2008 is that backup compression is now supported in Standard Edition of SQL Server. That in itself is good news. Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!...(read more)

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• SQL Server 2008 R2: StreamInsight - User-defined aggregates

  - by Greg Low

  I'd briefly played around with user-defined aggregates in StreamInsight with CTP3 but when I started working with the new Count Windows, I found I had to have one working. I learned a few things along the way that I hope will help someone. The first thing you have to do is define a class: public class IntegerAverage : CepAggregate < int , int > { public override int GenerateOutput( IEnumerable < int > eventData) { if (eventData.Count() == 0) { return 0; } else { return eventData.Sum()...(read more)

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• Book Review: Fast Track to MDX

  - by Greg Low

  Another book that I re-read while travelling last week was Fast Track to MDX . I still think that it's the best book that I've seen for introducing the core concepts of MDX. SolidQ colleague Mark Whitehorn, along with Mosha Pasumansky and Robert Zare do an amazing job of building MDX knowledge throughout the book. I had dinner with Mark in London a few years back and I was pestering him to update this book. The biggest limitation of the book is that it was written for SQL Server 2000 Analysis Services,...(read more)

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• Securing credentials passed to web service

  - by Greg Smith

  I'm attempting to design a single sign on system for use in a distributed architecture. Specifically, I must provide a way for a client website (that is, a website on a different domain/server/network) to allow users to register accounts on my central system. So, when the user takes an action on a client website, and that action is deemed to require an account, the client will produce a page (on their site/domain) where the user can register for a new account by providing an email and password. The client must then send this information to a web service, which will register the account and return some session token type value. The client will need to hash the password before sending it across the wire, and the webservice will require https, but this doesn't feel like it's safe enough and I need some advice on how I can implement this in the most secure way possible. A few other bits of relevant information: Ideally we'd prefer not to share any code with the client We've considered just redirecting the user to a secure page on the same server as the webservice, but this is likely to be rejected for non-technical reasons. We almost certainaly need to salt the password before hashing and passing it over, but that requires the client to either a) generate the salt and communicate it to us, or b) come and ask us for the salt - both feel dirty. Any help or advice is most appreciated.

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• Kicking yourself because you missed the Oracle OpenWorld and Oracle Develop Call for Papers?

  - by Greg Kelly

  Here's a great opportunity! If you missed the Oracle OpenWorld and Oracle Develop Call for Papers, here is another opportunity to submit a paper to present. Submit a paper and ask your colleagues, Oracle Mix community, friends and anyone else you know to vote for your session. Note, only Oracle Mix members are allowed to vote. Voting is open from the end of May through June 20. For the most part, the top voted sessions will be selected for the program (although we may choose sessions in order to balance the content across the program). Please note that Oracle reserves the right to decline sessions that are not appropriate for the conference, such as subjects that are competitive in nature or sessions that cover outdated versions of products. Oracle OpenWorld and Oracle Develop Suggest-a-Session https://mix.oracle.com/oow10/proposals FAQ https://mix.oracle.com/oow10/faq

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• Adding included columns to indexes using SMO

  - by Greg Low

  A question came up on the SQL Down Under mailing list today about how to add an included column to an index using SMO. A quick search of the documentatio didn't seem to reveal any clues but a little investigation turned up what's needed: the IndexedColumn class has an IsIncluded property. Index i = new Index (); IndexedColumn ic = new IndexedColumn (i, "somecolumn" ); ic.IsIncluded = true ; Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!...(read more)

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• Update from Ola Hallengren: Target multiple devices during SQL Server backup

  - by Greg Low

  Ola has produced another update of his database management scripts. If you haven't taken a look at them, you should. At the very least, they'll give you good ideas about what to implement and how others have done so. The latest update allows targeting multiple devices during backup. This is available in native SQL Server backup and can be helpful with very large databases. Ola's scripts now support it as well.Details are here: http://ola.hallengren.com/sql-server-backup.html http://ola.hallengren.com/versions.html The following example shows it backing up to 4 files on 4 drives, one file on each drive:EXECUTE dbo.DatabaseBackup@Databases = 'USER_DATABASES',@Directory = 'C:\Backup, D:\Backup, E:\Backup, F:\Backup',@BackupType = 'FULL',@Compress = 'Y',@NumberOfFiles = 4And this example shows backing up to 16 files on 4 drives, 4 files on each drive: EXECUTE dbo.DatabaseBackup@Databases = 'USER_DATABASES',@Directory = 'C:\Backup, D:\Backup, E:\Backup, F:\Backup',@BackupType = 'FULL',@Compress = 'Y',@NumberOfFiles = 16Ola mentioned that you can now back up to up to 64 drives. 

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• Why does my application hang in interruptible state?

  - by Greg

  Hello, I am running on Ubuntu 10.04 LTS Server an GTK application that used to work fine. It suddenly started to hang in interruptible state (Sl+) without any apparent reason. Here is a snippet of the strace: poll([{fd=3, events=POLLIN}, {fd=5, events=POLLIN}], 2, 0) = 0 (Timeout) poll([{fd=5, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=5, revents=POLLOUT}]) writev(5, [{"\2\30\4\0\224\4\240\0\0@\0\0\37\0\240\0\2\4\4\0\224\4\240\0\0@\0\0\37\0\240\0"..., 192}, {NULL, 0}, {"", 0}], 3) = 192 read(5, 0x2ba9ac4, 4096) = -1 EAGAIN (Resource temporarily unavailable) I googled that line read(5, 0x2ba9ac4, 4096), which seems to be more significant, and it seems that many other applications tend to have the same problem. I tried to restart my X server, but it didn't help. Do you have an idea how to solve this problem?

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• Run database checks but omit large tables or filegroups - New option in Ola Hallengren's Scripts

  - by Greg Low

  One of the things I've always wanted in DBCC CHECKDB is the option to omit particular tables from the check. The situation that I often see is that companies with large databases often have only one or two very large tables. They want to run a DBCC CHECKDB on the database to check everything except those couple of tables due to time constraints. I posted a request on the Connect site about time some time ago: https://connect.microsoft.com/SQLServer/feedback/details/611164/dbcc-checkdb-omit-tables-option The workaround from the product team was that you could script out the checks that you did want to carry out, rather than omitting the ones that you didn't. I didn't overly like this as a workaround as clients often had a very large number of objects that they did want to check and only one or two that they didn't. I've always been impressed with the work that our buddy Ola Hallengren has done on his maintenance scripts. He pinged me recently about my old Connect item and said he was going to implement something similar. The good news is that it's available now. Here are some examples he provided of the newly-supported syntax: EXECUTE dbo.DatabaseIntegrityCheck @Databases = 'AdventureWorks', @CheckCommands = 'CHECKDB' EXECUTE dbo.DatabaseIntegrityCheck @Databases = 'AdventureWorks', @CheckCommands = 'CHECKALLOC,CHECKTABLE,CHECKCATALOG', @Objects = 'AdventureWorks.Person.Address' EXECUTE dbo.DatabaseIntegrityCheck @Databases = 'AdventureWorks', @CheckCommands = 'CHECKALLOC,CHECKTABLE,CHECKCATALOG', @Objects = 'ALL_OBJECTS,-AdventureWorks.Person.Address' EXECUTE dbo.DatabaseIntegrityCheck @Databases = 'AdventureWorks', @CheckCommands = 'CHECKFILEGROUP,CHECKCATALOG', @FileGroups = 'AdventureWorks.PRIMARY' EXECUTE dbo.DatabaseIntegrityCheck @Databases = 'AdventureWorks', @CheckCommands = 'CHECKFILEGROUP,CHECKCATALOG', @FileGroups = 'ALL_FILEGROUPS,-AdventureWorks.PRIMARY' Note the syntax to omit an object from the list of objects and the option to omit one filegroup. Nice! Thanks Ola! You'll find details here: http://ola.hallengren.com/  

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• GTK applications do not start

  - by Greg

  Hello, I have a fresh install of Ubuntu 10.04 Server on nodes of a computational cluster, and I access the nodes via ssh. I configured a X server, which I start with the command startx -- -ac. The server is running fine on port :0. Then, I set the environment variable DISPLAY to :0. Now, when I run a GTK application on the node, it fails with the following error: Error: Unable to initialize gtk, is DISPLAY set properly? Now, my question is, is there any runtime library that I need for running GTK applications on top of a X server? I'm probably missing something obvious here, but I can't tell what :P

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• Azure Search Preview

  - by Greg Low

  One of the things I’ve been keeping an eye on for quite a while now is the development of the Azure Search system. While it’s not a full replacement for the full-text indexing service in SQL Server on-premises as yet, it’s a really, really good start. Liam Cavanagh, Pablo Castro and the team have done a great job bringing this to the preview stage and I suspect it could be quite popular. I was very impressed by how they incorporated quite a bit of feedback I gave them early on, and I’m sure that others involved would have felt the same. There are two tiers at present. One is a free tier and has shared resources; the other is currently $125/month and has reserved resources. I would like to see another tier between these two, much the same way that Azure websites work. If you have any feedback on this, now would be a good time to make it known. In the meantime, given there is a free tier, there’s no excuse to not get out and try it. You’ll find details of it here: http://azure.microsoft.com/en-us/documentation/services/search/ I’ll be posting more info about this service, and showing examples of it during the upcoming months.

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• Free eBooks - SQL Server and other Microsoft Technologies

  - by Greg Low

  Great to see the advice from Gail Erickson about the release of a number of SQL Server related eBooks on the new Microsoft eBook Gallery site. It's good to see this sort of content moving over to eBook formats.The e-books that are currently available include: SQL Server 2012 Transact-SQL DML Reference Master Data Services Capacity Guidelines Microsoft SQL Server AlwaysOn Solutions Guide for High Availability and Disaster Recovery QuickStart: Learn DAX Basics in 30 Minutes Microsoft SQL Server Analysis Services Multidimensional Performance and Operations Guide You'll find details of them here: http://social.technet.microsoft.com/wiki/contents/articles/11608.e-book-gallery-for-microsoft-technologies.aspx

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• SQL Server 2008 R2: StreamInsight changes at RTM: Count Windows

  - by Greg Low

  Another interesting change in the RTM version of StreamInsight is the addition of a new window type. Count Windows aren't time based but are based on counting a number of events. The window type provided in this release is called CountByStartTimeWindow. Based on that name, you'd have to presume we might get other types of count windows in the future. This new window type takes two parameters. The first is the number of events. The second is an output policy, similar to the policies now required for...(read more)

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• Is it normal to these Xcode prompts/errors when you deploy to IOS Simulator from Unity?

  - by Greg

  Just trying out the IOS build process.... Is it normal to see: Q1 - "upgrade to latest project format - project currently in Xcode 3.1 format, this will upgrade to 3.2" - just click OK and let Xcode do it's stuff? Q2 - same as Q1 but this time for the message "Remove obsolete build settings - will remove the build setting PREBINDING" Q3 - also when deploying to "Lastest IOS Simulator" you get the Simulator target produced, but also a non-simulator target which has lots of errors. So I assume you just ignore this target and not use it in Xcode correct? (i.e. just use the simulator target that is produced) Q4 - get a lot of warning after the simulator target is built? program works ok however.... Images For Q1 and Q2: For Q4: Settings used in Unity: Errors I see in XCode:

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• SQL Server 2008 R2 Cumulative Update 8 now available

  - by Greg Low

  CU8 is now available for SQL Server 2008 R2. You will find it here: http://support.microsoft.com/kb/2534352/en-us It includes the following fixes: VSTS bug number KB article number Description 726734 2522893 (http://support.microsoft.com/kb/2522893/ ) FIX: A backup operation on a SQL Server 2008 or SQL Server 2008 R2 database fails if you enable change tracking on this database 730658 2525665 (http://support.microsoft.com/kb/2525665/ ) FIX: SQL Server 2008 BIDS stops responding when you stop debugging...(read more)

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• More free geek-read.December SolidQ Journal is online

  - by Greg Low

  I'm really excited to see the last SolidQ Journal for this year out the door. It's our free online magazine. I've been wondering about the future of printed technical magazines for a long time. I doubt they have much of a future, as online publications become more prevalent and more timely. By the time a print magazine gets to you, it's such a long time since the author wrote the material that it's hard to even retain relevance in a fast moving world. That's why I'm so happy to have the format we...(read more)

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• Facebook video is too choppy to watch.

  - by Greg Pauline

  Using firefox and chrome on an Acer Aspire 5100 with an AMD Turion 64 MK36 processor with 2GB of RAM and an ATI Radeon Xpress 110 Graphics card. I had a problem viewing Vimeo and youtube that has now been resolved with the help of this website. But now I find that trying to watch Facebook videos from family and friends is impossible due to the terrible choppy frame rate and near freezing of the browser window. Any idea what is going on and how to fix it?

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• Library Organization in .NET

  - by Greg Ros

  I've written a .NET bitwise operations library as part of my projects (stuff ranging from get MSB set to some more complicated bitwise transformations) and I mean to release it as free software. I'm a bit confused about a design aspect of the library, though. Many of the methods/transformations in the library come with different endianness. A simple example is a getBitAt method that regards index 0 as the least significant bit, or the most significant bit, depending on the version used. In practice, I've found that using separate functions for different endianness results in much more comprehensible and reusable code than assuming all operations are little-endian or something. I'm really stumped regarding how best to package the library. Should I have methods that have LE and BE versions take an enum parameter in their signature, e.g. Endianness.Little, Endianness.Big? Should I have different static classes with identically named methods? such as MSB.GetBit and LSB.GetBit On a much wider note, is there a standard I could use in cases like this? Some guide? Is my design issue trivial? I have a perfectionist bent, and I sometimes get stuck on tricky design issues like this... Note: I've sort of realized I'm using endianness somewhat colloquially to refer to the order/place value of digital component parts (be they bits, bytes, or words) in a larger whole, in any setting. I'm not talking about machine-level endianness or serial transmission endianness. Just about place-value semantics in general. So there isn't a context of targeting different machines/transmission techniques or something.

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• What types of objects are useful in SQL CLR?

  - by Greg Low

  I've had a number of people over the years ask about whether or not a particular type of object is a good candidate for SQL CLR integration. The rules that I normally apply are as follows: Database Object Transact-SQL Managed Code Scalar UDF Generally poor performance Good option when limited or no data-access Table-valued UDF Good option if data-related Good option when limited or no data-access Stored Procedure Good option Good option when external access is required or limited data access DML...(read more)

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• SQL Server 2008 R2: StreamInsight changes at RTM: AdvanceTimeSettings

  - by Greg Low

  For those that have worked with the earlier versions of the simulator that Bill Chesnut and I constructed for the Metro content (the Highway Simulator), changes are also required to how AdvanceTimeSettings are specified. The AdapterAdvanceTimeSettings value is now generated by binding an AdvanceTimeGenerationSettings (that is based on your adapter configuration) with an AdvanceTimePolicy setting. public class TollPointInputFactory : ITypedInputAdapterFactory < TollPointInputConfig >, ITypedDeclareAdvanceTimeProperties...(read more)

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• FIX: A network error occurred during SQL Server Native Client installation

  - by Greg Low

  One of the things that I have been pestering the SQL team to do is to name their updates according to what is contained in them. For example, instead of just: sqlncli.msi What I'd prefer is that the file was called something like: SQLServerNativeClient2k8SP1CU3x64.msi So I normally rename them as soon as I receive them, to avoid confusion in future. However, today I found that doing so caused me a problem. After renaming the file, and installing it, the installation failed with the error: " A network...(read more)

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• PASS Summit edition of SolidQ Journal (November edition)

  - by Greg Low

  I've been travelling a lot again lately and while I was in Beijing, our SolidQ Journal team released the November edition, so I'm a bit late letting you know about it. In addition to the regular columnists, the November edition brought articles from some of our mentors that were presenting at the PASS summit. In the BI area this month, we have a feature from Davide Mauri that covers a new dimension loading tool (DLPC) which is available for free download to SolidQ Journal readers and PASS attendees....(read more)

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• Web Usage Policies at "Best Companies to Work For"

  - by Greg

  For any company that has made it onto a "Best Companies to Work For" list* in 2010 that hires programmers, what restrictions on web usage do they have in place? Does that company view unrestricted internet access as a benefit to their employees even if they might use it for non-work related reasons? If you can provide a link to back up this information, even better. (* I don't want to promote any specific publication, but they are easy enough to find.) My hypothesis is that a company that aspires to be one of the best needs to provide fairly unrestricted internet access and I'm trying to test it.

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• what's wrong with this Lua code (creating text inside listener in Corona)

  - by Greg

  If you double/triple click on the myObject here the text does NOT disappear. Why is this not working when there are multiple events being fired? That is, are there actually multiple "text" objects, with some existing but no longer having a reference to them held by the local "myText" variable? Do I have to manually removeSelf() on the local "myText" field before assigning it another "display.newText(...)"? display.setStatusBar( display.HiddenStatusBar ) local myText local function hideMyText(event) print ("hideMyText") myText.isVisible = false end local function showTextListener(event) if event.phase == "began" then print("showTextListener") myText = display.newText("Hello World!", 0, 0, native.systemFont, 30) timer.performWithDelay(1000, hideMyText, 1 ) end end -- Display object to press to show text local myObject = display.newImage( "inventory_button.png", display.contentWidth/2, display.contentHeight/2) myObject:addEventListener("touch", showTextListener) Question 2 - Also why is it the case that if I add a line BEFORE "myText = ..." of: a) "if myText then myText:removeSelf() end" = THIS FIXES THINGS, whereas b) "if myText then myText=nil end" = DOES NOT FIX THINGS Interested in hearing how Lua works here re the answer...

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