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  • How views are changing in future versions of SQL

    - by Rob Farley
    April is here, and this weekend, SQL v11.0 (previous known as Denali, now known as SQL Server 2012) reaches general availability. And so I thought I’d share some news about what’s coming next. I didn’t hear this at the MVP Summit earlier this year (where there was lots of NDA information given, but I didn’t go), so I think I’m free to share it. I’ve written before about CTEs being query-scoped views. Well, the actual story goes a bit further, and will continue to develop in future versions. A CTE is a like a “temporary temporary view”, scoped to a single query. Due to globally-scoped temporary objects using a two-hashes naming style, and session-scoped (or ‘local’) temporary objects a one-hash naming style, this query-scoped temporary object uses a cunning zero-hash naming style. We see this implied in Books Online in the CREATE TABLE page, but as we know, temporary views are not yet supported in the SQL Server. However, in a breakaway from ANSI-SQL, Microsoft is moving towards consistency with their naming. We know that a CTE is a “common table expression” – this is proving to be a more strategic than you may have appreciated. Within the Microsoft product group, the term “Table Expression” is far more widely used than just CTEs. Anything that can be used in a FROM clause is referred to as a Table Expression, so long as it doesn’t actually store data (which would make it a Table, rather than a Table Expression). You can see this is not just restricted to the product group by doing an internet search for how the term is used without ‘common’. In the past, Books Online has referred to a view as a “virtual table” (but notice that there is no SQL 2012 version of this page). However, it was generally decided that “virtual table” was a poor name because it wasn’t completely accurate, and it’s typically accepted that virtualisation and SQL is frowned upon. That page I linked to says “or stored query”, which is slightly better, but when the SQL 2012 version of that page is actually published, the line will be changed to read: “A view is a stored table expression (STE)”. This change will be the first of many. During the SQL 2012 R2 release, the keyword VIEW will become deprecated (this will be SQL v11 SP1.5). Three versions later, in SQL 14.5, you will need to be in compatibility mode 140 to allow “CREATE VIEW” to work. Also consistent with Microsoft’s deprecation policy, the execution of any query that refers to an object created as a view (rather than the new “CREATE STE”), will cause a Deprecation Event to fire. This will all be in preparation for the introduction of Single-Column Table Expressions (to be introduced in SQL 17.3 SP6) which will finally shut up those people waiting for a decent implementation of Inline Scalar Functions. And of course, CTEs are “Common” because the Table Expression definition needs to be repeated over and over throughout a stored procedure. ...or so I think I heard at some point. Oh, and congratulations to all the new MVPs on this April 1st. @rob_farley

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  • DIR $file "File Not Found" vs DIR $filedir shows it....not permissions, not USB

    - by Kev
    I was having this problem before on a USB drive, but now it's happening on my main RAID5-backed hard disk: 2013-10-17 9:37 C:\>dir "C:\Shares\Shared\Reference\Safety Management System\Vid eo CD\AutoPlay\Docs\Manuel*" Volume in drive C has no label. Volume Serial Number is 3C18-E114 Directory of C:\Shares\Shared\Reference\Safety Management System\Video CD\AutoP lay\Docs 2003-09-09 11:29 PM 1,056,768 Manuel d'intervention d'urgence MFC.doc 2004-06-20 10:36 PM 139,849 Manuel d'intervention d'urgence MFC.pdf 2 File(s) 1,196,617 bytes 0 Dir(s) 196,068,691,968 bytes free 2013-10-17 9:38 C:\>dir "C:\Shares\Shared\Reference\Safety Management System\Vid eo CD\AutoPlay\Docs\Manuel d'intervention d'urgence MFC.doc" Volume in drive C has no label. Volume Serial Number is 3C18-E114 Directory of C:\Shares\Shared\Reference\Safety Management System\Video CD\AutoP lay\Docs File Not Found 2013-10-17 9:38 C:\> This is from a Command Prompt window where I went to Properties and told it I wanted to modify who it ran as. I opened it, had it run as me with the "restricted access" unchecked, then ran the above. The file in question has the following ACLs: Administrators, SYSTEM, and OurCompanyUsers. All three have full control of everything. Nobody has any Deny bits set. I am a member of Administrators. So I don't believe it's a permissions issue. It's not a USB drive, so this time there is no question of USB hardware. Windows Server 2003 Standard Edition SP2. What does this mean? Is this more likely a hardware or software problem?

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  • ALT+SysRq+REISUB hangs at "resetting" (without actually resetting/restarting) in Maverick

    - by Andrei
    I'm trying ALT+SysRq+REISUB to see how it would be used to restart my system safely in case of emergency. However, I find that ALT+SysRq+REISUB hangs at "resetting" (without actually resetting/restarting) in Maverick. All other SysRq combinations appear to work correctly (i.e. ALT+SysRq+REISU). cat /proc/sys/kernel/sysrq returns 0. But I'm not sure it's relevant because ALT+SysRq certainly works. What can I do to have "B" actually restart the system? Thanks!

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  • SysRq+REISUB hangs at "resetting" (without actually resetting/restarting) in Maverick

    - by Andrei
    I'm trying SysRq+REISUB to see how it would be used to restart my system safely in case of emergency. However, I find that SysRq+REISUB hangs at "resetting" (without actually resetting/restarting) in Maverick. All other SysRq combinations appear to work correctly (i.e. SysRq+REISU). cat /proc/sys/kernel/sysrq returns 0. But I'm not sure it's relevant because SysRq certainly works. What can I do to have "B" actually restart the system? Thanks!

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  • Do you actually write 'clean code'?

    - by ykombinator
    I have seen some programmers tweaking their code over and over again not only to make it 'work good', but also to make it 'look good'. IMO, 'clean code' is actually a compliment indicating your code is elegant, perfectly understandable and maintainable. And the difference comes out when you have to choose between an aesthetically appealing code vs. code that's stressful to look at. So, how many of you actually write 'clean code'? Is it a good practice? What are the other benefits or drawbacks of this? EDIT: I came across the term 'girl-code' here.

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  • Is testable code actually more stable? [closed]

    - by Xodarap
    A google scholar search turns up numerous papers on testability, including models for computing testability, recommendations for how ones code can be more testable, etc. They all come with the assertion that more testable code is more stable, however I can't find any studies which actually demonstrate this. I tried looking for studies evaluating the effect of testable code vs. quality, however the closest I can find is Improving the Testability of Object Oriented Systems, which discusses the relationship between design flaws and testability. Is testable code is actually more stable? And why, or why not? Please back up your answers with references or evidence to back up your claim.

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  • Installation of SAP Web Application Server 6.20 in Windows Vista

    - by karthikeyan b
    I tried installing trial version of sap netweaver 7.1 in windows vista in my laptop but i couldnt succeed there.. then i tried installing SAP WEB AS 6.20 now.I am able to succeed till 91% completion.After that i get some errors and the installation stops... if anybody have any experiences please share.it will be really helpful.I mentioned the complete log details below. nfo: INSTGUI.EXE Protocol version is 10. Message checksum is 7613888. Info: INSTGUI MessageFile Start message loading... Info: INSTGUI MessageFile Finished message loading. Info: InstController Prepare {} {} R3SETUP Version: Apr 24 2002 Info: InstController Prepare {} {} Logfile will be set to E:\R3SETUP\BSP.log Check E:\R3SETUP\BSP.log for further messages. Info: CommandFileController SyFileVersionSave {} {} Saving original content of file E:\R3SETUP\BSP.R3S ... Warning: CommandFileController SyFileCopy {} {} Function CopyFile() failed at location SyFileCopy-681 Warning: CommandFileController SyFileCopy {} {} errno: 5: Access is denied. Warning: CommandFileController SyFileCreateWithPermissions {} {} errno: 13: Permission denied Warning: CommandFileController SyPermissionSet {} {} Function SetNamedSecurityInfo() failed for E:\R3SETUP\BSP.R3S at location SyPermissionSet-2484 Warning: CommandFileController SyPermissionSet {} {} errno: 5: Access is denied. Error: CommandFileController StoreMasterTableFromCommandFile 2 333 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 333 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 309 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 309 CommandFile could not be updated Info: CDSERVERBASE InternalColdKeyCheck 2 309 The CD KERNEL will not be copied. Info: CDSERVERBASE InternalColdKeyCheck 2 309 The CD DATA1 will not be copied. Info: CDSERVERBASE InternalColdKeyCheck 2 309 The CD DATA2 will not be copied. Error: CommandFileController StoreMasterTableFromCommandFile 2 333 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 333 CommandFile could not be updated Info: CENTRDBINSTANCE_NT_ADA SyCheckHostnameLookup 2 333 checking host name lookup for 'Karthikeyan' Info: CENTRDBINSTANCE_NT_ADA SyCheckHostnameLookup 2 333 offical host name for 'Karthikeyan' is 'Karthikeyan'. Info: CENTRDBINSTANCE_NT_ADA SyCheckHostnameLookup 2 333 host 'Karthikeyan' has ip address '115.184.71.93' Info: CENTRDBINSTANCE_NT_ADA SyCheckHostnameLookup 2 333 offical host name for '115.184.71.93' is 'Karthikeyan'. Info: CENTRDBINSTANCE_NT_ADA SyCheckHostnameLookup 2 333 checking host name lookup for 'Karthikeyan' Info: CENTRDBINSTANCE_NT_ADA SyCheckHostnameLookup 2 333 offical host name for 'Karthikeyan' is 'Karthikeyan'. Info: CENTRDBINSTANCE_NT_ADA SyCheckHostnameLookup 2 333 host 'Karthikeyan' has ip address '115.184.71.93' Info: CENTRDBINSTANCE_NT_ADA SyCheckHostnameLookup 2 333 offical host name for '115.184.71.93' is 'Karthikeyan'. Info: CENTRDBINSTANCE_NT_ADA SyCheckHostnameLookup 2 333 checking host name lookup for 'Karthikeyan' Info: CENTRDBINSTANCE_NT_ADA SyCheckHostnameLookup 2 333 offical host name for 'Karthikeyan' is 'Karthikeyan'. Info: CENTRDBINSTANCE_NT_ADA SyCheckHostnameLookup 2 333 host 'Karthikeyan' has ip address '115.184.71.93' Info: CENTRDBINSTANCE_NT_ADA SyCheckHostnameLookup 2 333 offical host name for '115.184.71.93' is 'Karthikeyan'. Info: CENTRDBINSTANCE_NT_ADA SyCheckHostnameLookup 2 333 checking host name lookup for 'Karthikeyan' Info: CENTRDBINSTANCE_NT_ADA SyCheckHostnameLookup 2 333 offical host name for 'Karthikeyan' is 'Karthikeyan'. Info: CENTRDBINSTANCE_NT_ADA SyCheckHostnameLookup 2 333 host 'Karthikeyan' has ip address '115.184.71.93' Info: CENTRDBINSTANCE_NT_ADA SyCheckHostnameLookup 2 333 offical host name for '115.184.71.93' is 'Karthikeyan'. Error: CommandFileController StoreMasterTableFromCommandFile 2 99 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 99 CommandFile could not be updated Warning: ADADBINSTANCE_IND_ADA GetConfirmationFor 2 58 Cleanup database instance BSP for new installation. Error: CommandFileController StoreMasterTableFromCommandFile 2 58 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 58 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 333 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 333 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1206 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1206 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 75 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 75 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 247 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 247 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1195 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1195 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1195 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1195 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 120 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 120 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 816 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 816 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 242 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 242 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 816 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 816 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 816 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 816 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 816 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 816 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 815 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 815 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 223 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 223 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 10 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 10 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 263 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 263 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 263 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 263 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 263 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 263 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 760 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 760 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1267 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1267 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1111 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1111 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1122 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1122 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1114 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1114 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 54 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 54 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1146 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1146 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 718 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 718 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 760 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 760 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 333 Requesting Installation Details Error: CommandFileController StoreMasterTableFromCommandFile 2 333 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 333 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 333 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 333 CommandFile could not be updated Info: CDSERVERBASE InternalWarmKeyCheck 2 309 The CD KERNEL will not be copied. Info: CDSERVERBASE InternalWarmKeyCheck 2 309 The CD DATA1 will not be copied. Info: CDSERVERBASE InternalWarmKeyCheck 2 309 The CD DATA2 will not be copied. Info: InstController MakeStepsDeliver 2 309 Requesting Information on CD-ROMs Error: CommandFileController StoreMasterTableFromCommandFile 2 309 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 309 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 309 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 309 CommandFile could not be updated Info: CENTRDBINSTANCE_NT_ADA InternalWarmKeyCheck 2 333 The installation phase is starting now. Please look in the log file for further information about current actions. Info: InstController MakeStepsDeliver 2 333 Requesting Installation Details Error: CommandFileController StoreMasterTableFromCommandFile 2 333 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 333 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 333 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 333 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 99 Defining Key Values Error: CommandFileController StoreMasterTableFromCommandFile 2 99 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 99 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 99 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 99 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 58 Requesting Setup Details Error: CommandFileController StoreMasterTableFromCommandFile 2 58 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 58 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 58 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 58 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 333 Requesting Installation Details Error: CommandFileController StoreMasterTableFromCommandFile 2 333 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 333 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 333 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 333 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 1206 Setting Users for Single DB landscape Error: CommandFileController StoreMasterTableFromCommandFile 2 1206 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1206 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1206 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1206 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 75 Stopping the SAP DB Instance Error: CommandFileController StoreMasterTableFromCommandFile 2 75 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 75 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 75 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 75 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 247 Stopping the SAP DB remote server Error: CommandFileController StoreMasterTableFromCommandFile 2 247 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 247 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 247 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 247 CommandFile could not be updated Warning: CDSERVERBASE ConfirmKey 2 1195 Can not read from Z:. Please ensure this path is accessible. Info: LvKeyRequest For further information see HTML documentation: step: SAPDBSETCDPATH_IND_IND and key: KERNEL_LOCATION Info: InstController MakeStepsDeliver 2 1195 Installing SAP DB Software Error: CommandFileController StoreMasterTableFromCommandFile 2 1195 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1195 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1195 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1195 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 1195 Installing SAP DB Software Info: SAPDBINSTALL_IND_ADA SyCoprocessCreate 2 1195 Creating coprocess E:\sapdb\NT\I386\sdbinst.exe ... Info: SAPDBINSTALL_IND_ADA ExecuteDo 2 1195 RC code form SyCoprocessWait = 0 . Error: CommandFileController StoreMasterTableFromCommandFile 2 1195 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1195 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1195 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1195 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 120 Extracting SAP DB Tools Software Info: ADAEXTRACTLCTOOLS_NT_ADA SyCoprocessCreate 2 120 Creating coprocess SAPCAR ... Info: ADAEXTRACTLCTOOLS_NT_ADA SyCoprocessCreate 2 120 Creating coprocess SAPCAR ... Error: CommandFileController StoreMasterTableFromCommandFile 2 120 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 120 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 120 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 120 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 816 Extracting the Database-Dependent SAP system Executables Info: ADAEXTRACTBSPCFG SyCoprocessCreate 2 816 Creating coprocess SAPCAR ... Info: ADAEXTRACTBSPCFG SyCoprocessCreate 2 816 Creating coprocess SAPCAR ... Error: CommandFileController StoreMasterTableFromCommandFile 2 816 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 816 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 816 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 816 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 242 Starting VSERVER Info: ADAXSERVER_NT_ADA SyCoprocessCreate 2 242 Creating coprocess C:\sapdb\programs\bin\x_server.exe ... Info: ADAXSERVER_NT_ADA ExecuteDo 2 242 RC code form SyCoprocessWait = 0 . Error: CommandFileController StoreMasterTableFromCommandFile 2 242 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 242 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 242 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 242 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 816 Extracting the Database-Dependent SAP system Executables Info: EXTRACTSAPEXEDBDATA1 SyCoprocessCreate 2 816 Creating coprocess SAPCAR ... Info: EXTRACTSAPEXEDBDATA1 SyCoprocessCreate 2 816 Creating coprocess SAPCAR ... Error: CommandFileController StoreMasterTableFromCommandFile 2 816 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 816 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 816 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 816 CommandFile could not be updated Warning: CDSERVERBASE ConfirmKey 2 816 Can not read from Y:. Please ensure this path is accessible. Info: LvKeyRequest For further information see HTML documentation: step: EXTRACTSAPEXEDBDATA2 and key: DATA1_LOCATION Info: InstController MakeStepsDeliver 2 816 Extracting the Database-Dependent SAP system Executables Info: EXTRACTSAPEXEDBDATA2 SyCoprocessCreate 2 816 Creating coprocess SAPCAR ... Info: EXTRACTSAPEXEDBDATA2 SyCoprocessCreate 2 816 Creating coprocess SAPCAR ... Error: CommandFileController StoreMasterTableFromCommandFile 2 816 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 816 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 816 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 816 CommandFile could not be updated Warning: CDSERVERBASE ConfirmKey 2 816 Can not read from X:. Please ensure this path is accessible. Info: LvKeyRequest For further information see HTML documentation: step: EXTRACTSAPEXEDBDATA3 and key: DATA2_LOCATION Info: InstController MakeStepsDeliver 2 816 Extracting the Database-Dependent SAP system Executables Info: EXTRACTSAPEXEDBDATA3 SyCoprocessCreate 2 816 Creating coprocess SAPCAR ... Info: EXTRACTSAPEXEDBDATA3 SyCoprocessCreate 2 816 Creating coprocess SAPCAR ... Error: CommandFileController StoreMasterTableFromCommandFile 2 816 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 816 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 816 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 816 CommandFile could not be updated Warning: CDSERVERBASE ConfirmKey 2 815 We tried to find the label SAPDB:MINI-WAS-DEMO:620:KERNEL for CD KERNEL in path E:. But the check was not successfull. Info: LvKeyRequest For further information see HTML documentation: step: EXTRACTSAPEXE and key: KERNEL_LOCATION Info: InstController MakeStepsDeliver 2 815 Extracting the SAP Executables Info: EXTRACTSAPEXE SyCoprocessCreate 2 815 Creating coprocess SAPCAR ... Info: EXTRACTSAPEXE SyCoprocessCreate 2 815 Creating coprocess SAPCAR ... Error: CommandFileController StoreMasterTableFromCommandFile 2 815 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 815 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 815 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 815 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 223 Setting new Rundirectory. Info: ADADBREGISTER_IND_ADA SyCoprocessCreate 2 223 Creating coprocess C:\sapdb\programs\pgm\dbmcli.exe ... Info: ADADBREGISTER_IND_ADA ExecuteDo 2 223 RC code form SyCoprocessWait = 0 . Error: CommandFileController StoreMasterTableFromCommandFile 2 223 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 223 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 223 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 223 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 1 ADASETDEVSPACES_IND_ADA Error: CommandFileController StoreMasterTableFromCommandFile 2 1 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 10 Performing Service BCHECK Error: CommandFileController StoreMasterTableFromCommandFile 2 10 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 10 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 10 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 10 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 263 Creating XUSER File for the User ADM for Dialog Instance Info: ADAXUSERSIDADM_DEFAULT_NT_ADA SyCoprocessCreate 2 263 Creating coprocess C:\sapdb\programs\pgm\dbmcli.exe ... Info: ADAXUSERSIDADM_DEFAULT_NT_ADA ExecuteDo 2 263 RC code form SyCoprocessWait = 0 . Error: CommandFileController StoreMasterTableFromCommandFile 2 263 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 263 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 263 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 263 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 263 Creating XUSER File for the User ADM for Dialog Instance Info: ADAXUSERSIDADM_COLD_NT_ADA SyCoprocessCreate 2 263 Creating coprocess C:\sapdb\programs\pgm\dbmcli.exe ... Info: ADAXUSERSIDADM_COLD_NT_ADA ExecuteDo 2 263 RC code form SyCoprocessWait = 0 . Error: CommandFileController StoreMasterTableFromCommandFile 2 263 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 263 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 263 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 263 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 263 Creating XUSER File for the User ADM for Dialog Instance Info: ADAXUSERSIDADM_WARM_NT_ADA SyCoprocessCreate 2 263 Creating coprocess C:\sapdb\programs\pgm\dbmcli.exe ... Info: ADAXUSERSIDADM_WARM_NT_ADA ExecuteDo 2 263 RC code form SyCoprocessWait = 0 . Error: CommandFileController StoreMasterTableFromCommandFile 2 263 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 263 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 263 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 263 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 760 Creating the Default Profile Info: DEFAULTPROFILE_IND_IND SyFileVersionSave 2 760 Saving original content of file C:\MiniWAS\DEFAULT.PFL ... Error: CommandFileController StoreMasterTableFromCommandFile 2 760 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 760 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 760 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 760 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 1267 Modifying or Creating the TPPARAM File Info: TPPARAMMODIFY_NT_ADA SyFileVersionSave 2 1267 Saving original content of file C:\MiniWAS\trans\bin\TPPARAM ... Error: CommandFileController StoreMasterTableFromCommandFile 2 1267 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1267 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1267 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1267 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 1111 Creating the Service Entry for the Dispatcher Info: R3DISPATCHERPORT_IND_IND IaServicePortAppend 2 1111 Checking service name sapdp00, protocol tcp, port number 3200 ... Info: R3DISPATCHERPORT_IND_IND IaServicePortAppend 2 1111 Port name sapdp00 is known and the port number 3200 is equal to the existing port number 3200 Error: CommandFileController StoreMasterTableFromCommandFile 2 1111 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1111 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1111 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1111 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 1122 Creating the Service Entry for the Message Server Info: R3MESSAGEPORT_IND_IND IaServicePortAppend 2 1122 Checking service name sapmsBSP, protocol tcp, port number 3600 ... Info: R3MESSAGEPORT_IND_IND IaServicePortAppend 2 1122 Port name sapmsBSP is known and the port number 3600 is equal to the existing port number 3600 Error: CommandFileController StoreMasterTableFromCommandFile 2 1122 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1122 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1122 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1122 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 1114 Creating the Service Entry for the Gateway Service Info: R3GATEWAYPORT_IND_IND IaServicePortAppend 2 1114 Checking service name sapgw00, protocol tcp, port number 3300 ... Info: R3GATEWAYPORT_IND_IND IaServicePortAppend 2 1114 Port name sapgw00 is known and the port number 3300 is equal to the existing port number 3300 Error: CommandFileController StoreMasterTableFromCommandFile 2 1114 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1114 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1114 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1114 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 1 PISTARTBSP Info: PISTARTBSP SyDirCreate 2 1 Checking existence of directory C:\Users\Karthikeyan\Desktop. If it does not exist creating it with user , group and permission 0 ... Error: CommandFileController StoreMasterTableFromCommandFile 2 1 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 1 PISTARTBSPGROUP Info: PISTARTBSPGROUP SyDirCreate 2 1 Checking existence of directory C:\Users\Karthikeyan\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Mini SAP Web Application Server. If it does not exist creating it with user , group and permission 0 ... Error: CommandFileController StoreMasterTableFromCommandFile 2 1 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1 CommandFile could not be updated Error: CommandFileController StoreMasterTableFromCommandFile 2 1 Command file could not be opened. Error: CommandFileController SetKeytableForSect 2 1 CommandFile could not be updated Info: InstController MakeStepsDeliver 2 54 Starting SAP DB to Mode WARM Error: Command

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  • How Do You Actually Model Data?

    Since the 1970’s Developers, Analysts and DBAs have been able to represent concepts and relations in the form of data through the use of generic symbols.  But what is data modeling?  The first time I actually heard this term I could not understand why anyone would want to display a computer on a fashion show runway. Hey, what do you expect? At that time I was a freshman in community college, and obviously this was a long time ago.  I have since had the chance to learn what data modeling truly is through using it. Data modeling is a process of breaking down information and/or requirements in to common categories called objects. Once objects start being defined then relationships start to form based on dependencies found amongst other existing objects.  Currently, there are several tools on the market that help data designer actually map out objects and their relationships through the use of symbols and lines.  These diagrams allow for designs to be review from several perspectives so that designers can ensure that they have the optimal data design for their project and that the design is flexible enough to allow for potential changes and/or extension in the future. Additionally these basic models can always be further refined to show different levels of details depending on the target audience through the use of three different types of models. Conceptual Data Model(CDM)Conceptual Data Models include all key entities and relationships giving a viewer a high level understanding of attributes. Conceptual data model are created by gathering and analyzing information from various sources pertaining to a project during the typical planning phase of a project. Logical Data Model (LDM)Logical Data Models are conceptual data models that have been expanded to include implementation details pertaining to the data that it will store. Additionally, this model typically represents an origination’s business requirements and business rules by defining various attribute data types and relationships regarding each entity. This additional information can be directly translated to the Physical Data Model which reduces the actual time need to implement it. Physical Data Model(PDMs)Physical Data Model are transformed Logical Data Models that include the necessary tables, columns, relationships, database properties for the creation of a database. This model also allows for considerations regarding performance, indexing and denormalization that are applied through database rules, data integrity. Further expanding on why we actually use models in modern application/database development can be seen in the benefits that data modeling provides for data modelers and projects themselves, Benefits of Data Modeling according to Applied Information Science Abstraction that allows data designers remove concepts and ideas form hard facts in the form of data. This gives the data designers the ability to express general concepts and/or ideas in a generic form through the use of symbols to represent data items and the relationships between the items. Transparency through the use of data models allows complex ideas to be translated in to simple symbols so that the concept can be understood by all viewpoints and limits the amount of confusion and misunderstanding. Effectiveness in regards to tuning a model for acceptable performance while maintaining affordable operational costs. In addition it allows systems to be built on a solid foundation in terms of data. I shudder at the thought of a world without data modeling, think about it? Data is everywhere in our lives. Data modeling allows for optimizing a design for performance and the reduction of duplication. If one was to design a database without data modeling then I would think that the first things to get impacted would be database performance due to poorly designed database and there would be greater chances of unnecessary data duplication that would also play in to the excessive query times because unneeded records would need to be processed. You could say that a data designer designing a database is like a box of chocolates. You will never know what kind of database you will get until after it is built.

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  • If Expression True in Immediate Window But Code In if Block Never Runs

    - by Julian
    I set a break point in my code in MonoDevelop to break whenever I click on a surface. I then enter the immediate window and test to see if the the if statement will return true in comparing two Vector3's. It does return true. However, when I step over, the code is never run as though the statement evaluated false. Does anyone know how this could be possible? I've attached a screenshot. Here is the picture of my debug window and immediate window. You can see where the immediate window evaluates to true. The second breakpoint is not hit. Here are the details of the two Vector3's I am comparing. Does anyone know why I am experiencing this? It really seems like an anomaly to me :/ Does it have something to do with threading?

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  • Reminder: True WCF Asynchronous Operation

    - by Sean Feldman
    A true asynchronous service operation is not the one that returns void, but the one that is marked as IsOneWay=true. Without this, client will always wait for valid response from server, blocking execution. Possible work-around is to generate asynchronous methods and subscribe to Completed event, but then it’s a pseudo asynchronous. Real fire-and-forget is with one way operations.

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  • LCM says Smart List import is complete but actually its not...Here are probable reasons

    - by RahulS
    First of all some basics of smart list: Administrators use Smart Lists to create custom drop-down lists that users access from data form cells. When clicking in cells whose members are associated with a Smart List (as a member property), users select items from drop-down lists instead of entering data. Users cannot type in cells that contain Smart Lists. Smart Lists display in cells as down arrows that expand when users click into the cells. Below link will give you more information on Smart Lists: http://download.oracle.com/docs/cd/E17236_01/epm.1112/hp_admin/enum_pg.html I got a simple query today, "The LCM process generates and indicates a status of "Complete", however, the 3,018 records do not appear in the Planning application. No error exists in the log to identify the problem." Things which can be checked in this case: 1. Spaces are not allowed in the Entry Name, 2. Spaces are allowed in the Entry Label, 3. The name must start with an alpha character or underscore, 4. Valid characters for the remaining part of the name must be alpha, numeric, or an underscore, 5. Enter a name that is unique within the smart list, 6. I am not sure about the limits but I have seen 22,000 members loaded fine, 7. ID for every entry should be unique,  8. IDs need not to be consecutive, Ex: It was go from 1 to 100 then 500 to 900 then 1900 to 4500 etc. While import .xml file using LCM there were no errors in the foundation and LCM migration logs, but when checked in the HyS9PlanningSysErr.log, few errors were found:Ex: The name Data_Coord_(Prod)_ACS is invalid, The name Sr_Dir_b+Medcd_Gvt_Rel_Sls_Mkt is invalid, The name entered is invalid. Enter a name that is unique within the smart list, Also, we can Load Smart List dimensions and Smart List dimension entries using the /DS:HSP_SMARTLISTS parameter in outlineload utility: OutlineLoad /A:acpt /U:admin /M /I:c:/smartlist_create1.csv /DS:HSP_SMARTLISTS /L:c:/OutlineLogs/outlineLoad.log /X:c:/OutlineLogs/outlineLoad.exc SmartList Name, Operation, Label, Display Order, Missing Label, Use Form Missing Label, Entry ID, Entry Name, Entry Label SL1,addsmartlist,SL1Label,,,,,, SL1,addEntry,,,,,,entry1,entrylabel1 SL1,addEntry,,,,,,entry2,entrylabel2 Cheers..!!! Rahul S. http://www.facebook.com/pages/HyperionPlanning/117320818374228

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  • The True Cost of a Solution

    - by D'Arcy Lussier
    I had a Twitter chat recently with someone suggesting Oracle and SQL Server were losing out to OSS (Open Source Software) in the enterprise due to their issues with scaling or being too generic (one size fits all). I challenged that a bit, as my experience with enterprise sized clients has been different – adverse to OSS but receptive to an established vendor. The response I got was: Found it easier to influence change by showing how X can’t solve our problems or X is extremely costly to scale. Money talks. I think this is definitely the right approach for anyone pitching an alternate or alien technology as part of a solution: identify the issue, identify the solution, then present pros and cons including a cost/benefit analysis. What can happen though is we get tunnel vision and don’t present a full view of the costs associated with a solution. An “Acura”te Example (I’m so clever…) This is my dream vehicle, a Crystal Black Pearl coloured Acura MDX with the SH-AWD package! We’re a family of 4 (5 if my daughters ever get their wish of adding a dog), and I’ve always wanted a luxury type of vehicle, so this is a perfect replacement in a few years when our Rav 4 has hit the 8 – 10 year mark. MSRP – $62,890 But as we all know, that’s not *really* the cost of the vehicle. There’s taxes and fees added on, there’s the extended warranty if I choose to purchase it, there’s the finance rate that needs to be factored in… MSRP –   $62,890 Taxes –      $7,546 Warranty - $2,500 SubTotal – $72,936 Finance Charge – $ 1094.04 Grand Total – $74,030 Well! Glad we did that exercise – we discovered an extra $11k added on to the MSRP! Well now we have our true price…or do we? Lifetime of the Vehicle I’m expecting to have this vehicle for 7 – 10 years. While the hard cost of the vehicle is known and dealt with, the costs to run and maintain the vehicle are on top of this. I did some research, and here’s what I’ve found: Fuel and Mileage Gas prices are high as it is for regular fuel, but getting into an MDX will require that I *only* purchase premium fuel, which comes at a premium price. I need to expect my bill at the pump to be higher. Comparing the MDX to my 2007 Rav4 also shows I’ll be gassing up more often. The Rav4 has a city MPG of 21, while the MDX plummets to 16! The MDX does have a bigger fuel tank though, so all in all the number of times I hit the pumps might even out. Still, I estimate I’ll be spending approximately $8000 – $10000 more on gas over a 10 year period than my current Rav4. Service Options Limited Although I have options with my Toyota here in Winnipeg (we have 4 Toyota dealerships), I do go to my original dealer for any service work. Still, I like the fact that I have options. However, there’s only one Acura dealership in all of Winnipeg! So if, for whatever reason, I’m not satisfied with the level of service I’m stuck. Non Warranty Service Work Also let’s not forget that there’s a bulk of work required every year that is *not* covered under warranty – oil changes, tire rotations, brake pads, etc. I expect I’ll need to get new tires at the 5 years mark as well, which can easily be $1200 – $1500 (I just paid $1000 for new tires for the Rav4 and we’re at the 5 year mark). Now these aren’t going to be *new* costs that I’m not used to from our existing vehicles, but they should still be factored in. I’d budget $500/year, or $5000 over the 10 years I’ll own the vehicle. Final Assessment So let’s re-assess the true cost of my dream MDX: MSRP                    $62,890 Taxes                       $7,546 Warranty                 $2,500 Finance Charge         $1094 Gas                        $10,000 Service Work            $5000 Grand Total           $89,030 So now I have a better idea of 10 year cost overall, and I’ve identified some concerns with local service availability. And there’s now much more to consider over the original $62,890 price tag. Tying This Back to Technology Solutions The process that we just went through is no different than what organizations do when considering implementing a new system, technology, or technology based solution, within their environments. It’s easy to tout the short term cost savings of particular product/platform/technology in a vacuum. But its when you consider the wider impact that the true cost comes into play. Let’s create a scenario: A company is not happy with its current data reporting suite. An employee suggests moving to an open source solution. The selling points are: - Because its open source its free - The organization would have access to the source code so they could alter it however they wished - It provided features not available with the current reporting suite At first this sounds great to the management and executive, but then they start asking some questions and uncover more information: - The OSS product is built on a technology not used anywhere within the organization - There are no vendors offering product support for the OSS product - The OSS product requires a specific server platform to operate on, one that’s not standard in the organization All of a sudden, the true cost of implementing this solution is starting to become clearer. The company might save money on licensing costs, but their training costs would increase significantly – developers would need to learn how to develop in the technology the OSS solution was built on, IT staff must learn how to set up and maintain a new server platform within their existing infrastructure, and if a problem was found there was no vendor to contact for support. The true cost of implementing a “free” OSS solution is actually spinning up a project to implement it within the organization – no small cost. And that’s just the short-term cost. Now the organization must ensure they maintain trained staff who can make changes to the OSS reporting solution and IT staff that will stay knowledgeable in the new server platform. If those skills are very niche, then higher labour costs could be incurred if those people are hard to find or if trained employees use that knowledge as leverage for higher pay. Maybe a vendor exists that will contract out support, but then there are those costs to consider as well. And let’s not forget end-user training – in our example, anyone that runs reports will need to be trained on how to use the new system. Here’s the Point We still tend to look at software in an “off the shelf” kind of way. It’s very easy to say “oh, this product is better than vendor x’s product – and its free because its OSS!” but the reality is that implementing any new technology within an organization has a cost regardless of the retail price of the product. Training, integration, support – these are real costs that impact an organization and span multiple departments. Whether you’re pitching an improved business process, a new system, or a new technology, you need to consider the bigger picture costs of implementation. What you define as success (in our example, having better reporting functionality) might not be what others define as success if implementing your solution causes them issues. A true enterprise solution needs to consider the entire enterprise.

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  • Does Email Address Obfuscation Actually Prevent Spam?

    - by Jason Fitzpatrick
    Many people obfuscate their email addresses–typing out someguy (at) somedomain (dot) com, for example–to project themselves from SPAM bots. Do such obfuscation techniques actually work? Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. HTG Explains: Does Your Android Phone Need an Antivirus? How To Use USB Drives With the Nexus 7 and Other Android Devices Why Does 64-Bit Windows Need a Separate “Program Files (x86)” Folder?

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  • Get and Set property accessors are ‘actually’ methods

    - by nmarun
    Well, they are ‘special’ methods, but they indeed are methods. See the class below: 1: public class Person 2: { 3: private string _name; 4:  5: public string Name 6: { 7: get 8: { 9: return _name; 10: } 11: set 12: { 13: if (value == "aaa") 14: { 15: throw new ArgumentException("Invalid Name"); 16: } 17: _name = value; 18: } 19: } 20:  21: public void Save() 22: { 23: Console.WriteLine("Saving..."); 24: } 25: } Ok, so a class with a field, a property with the get and set accessors and a method. Now my calling code says: 1: static void Main() 2: { 3: try 4: { 5: Person person1 = new Person 6: { 7: Name = "aaa", 8: }; 9:  10: } 11: catch (Exception ex) 12: { 13: Console.WriteLine(ex.Message); 14: Console.WriteLine(ex.StackTrace); 15: Console.WriteLine("--------------------"); 16: } 17: } When the code is run, you’ll get the following exception message displayed: Now, you see the first line of the stack trace where it says that the exception was thrown in the method set_Name(String value). Wait a minute, we have not declared any method with that name in our Person class. Oh no, we actually have. When you create a property, this is what happens behind the screen. The CLR creates two methods for each get and set property accessor. Let’s look at the signature once again: set_Name(String value) This also tells you where the ‘value’ keyword comes from in our set property accessor. You’re actually wiring up a method parameter to a field. 1: set 2: { 3: if (value == "aaa") 4: { 5: throw new ArgumentException("Invalid Name"); 6: } 7: _name = value; 8: } Digging deeper on this, I ran the ILDasm tool and this is what I see: We see the ‘free’ constructor (named .ctor) that the compiler gives us, the _name field, the Name property and the Save method. We also see the get_Name and set_Name methods. In order to compare the Save and the set_Name methods, I double-clicked on the two methods and this is what I see: The ‘.method’ keyword tells that both Save and set_Name are both methods (no guessing there!). Seeing the set_Name method as a public method did kinda surprise me. So I said, why can’t I do a person1.set_Name(“abc”) since it is declared as public. This cannot be done because the get_Name and set_Name methods have an extra attribute called ‘specialname’. This attribute is used to identify an IL (Intermediate Language) token that can be treated with special care by the .net language. So the thumb-rule is that any method with the ‘specialname’ attribute cannot be generally called / invoked by the user (a simple test using intellisense proves this). Their functionality is exposed through other ways. In our case, this is done through the property itself. The same concept gets extended to constructors as well making them special methods too. These so-called ‘special’ methods can be identified through reflection. 1: static void ReflectOnPerson() 2: { 3: Type personType = typeof(Person); 4:  5: MethodInfo[] methods = personType.GetMethods(); 6:  7: for (int i = 0; i < methods.Length; i++) 8: { 9: Console.Write("Method: {0}", methods[i].Name); 10: // Determine whether or not each method is a special name. 11: if (methods[i].IsSpecialName) 12: { 13: Console.Write(" has 'SpecialName' attribute"); 14: } 15: Console.WriteLine(); 16: } 17: } Line 11 shows the ‘IsSpecialName’ boolean property. So a method with a ‘specialname’ attribute gets mapped to the IsSpecialName property. The output is displayed as: Wuhuuu! There they are.. our special guests / methods. Verdict: Getting to know the internals… helps!

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  • Does anyone actually use the /// comment blocks?

    - by Rachel
    Someone once said we should prefix all our methods with the /// <summary> comment blocks (C#) and I am wondering if that is true or not. I started to use them and found they annoyed me quite a bit, so stopped using them except for libraries and static methods. They're bulky and I'm always forgetting to update them. Do you recommend using them? Why? EDIT: I normally use // comments all the time, it's just the /// <summary> blocks I was wondering about

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  • Can Dust Actually Damage My Computer?

    - by Jason Fitzpatrick
    Thousands of hours per year of fan-driven air movement combined with electrostatic charges make computers veritable dust magnets. Is all that dust simply a nuisance or is it actually harmful? Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. What To Do If You Get a Virus on Your Computer Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked HTG Explains: What is the Windows Page File and Should You Disable It?

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  • How many developers actually have private offices?

    - by Prof Plum
    So I know everyone here is all about private offices, how many developers actually have them. I am sort of half skeptical. I can believe that lead developers have them, but thats normally just one person in your average office. If it would not be to much to ask: Do you work in a totally awesome office or a nasty old cube? (or somewhere in between) What's your relative rank in the office? (junior, programmer II, senior, lead, etc.) are you doing internal software, or are you in a software-centric environment? (the general thought seems to be that internal developers get cubes while others live in "Joel-Spolsky-Programmer-Candyland")

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  • How many developers actually have private offices?

    - by Morgan Herlocker
    So I know everyone here is all about private offices, how many developers actually have them. I am sort of half skeptical. I can believe that lead developers have them, but thats normally just one person in your average office. If it would not be to much to ask: Do you work in a totally awesome office or a nasty old cube? (or somewhere in between) What's your relative rank in the office? (junior, programmer II, senior, lead, etc.) are you doing internal software, or are you in a software-centric environment? (the general thought seems to be that internal developers get cubes while others live in "Joel-Spolsky-Programmer-Candyland")

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  • What is a byte stream actually?

    - by user2720323
    Can anyone explain me what byte stream actually contains? Does it contain bytes (hex data) or binary data or english letters only? I am also confused about the term Raw Data. If someone asked me to "reverse the 4 byte data", then what should I assume the data is hex code or binary code? Can anyone please clarify this for me. I have read so many articles and in java and c. They used to talk these words frequently but never understood them clearly.

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  • Boot-repair commands not found in PATH or not executable

    - by Bram Meerten
    I recently had problems with my ubuntu partition (after the battery died), I managed to fix them by running ubuntu from usb and run gparted. It worked I can access my files on the partition by running ubuntu from usb. But when I restart the computer, after selecting ubuntu in Grub, I get a black screen with a white underscore. I googled the problem, and tried to solve it by setting nomodeset, but it didn't work. Next I wanted to try to fix Grub using boot-repair, I clicked on 'Recommended repair', it tells me to type the following commands in the terminal: sudo chroot "/mnt/boot-sav/sda5" apt-get install -fy sudo chroot "/mnt/boot-sav/sda5" dpkg --configure -a sudo chroot "/mnt/boot-sav/sda5" apt-get purge -y --force-yes grub-common But when running the second command, I get this error: dpkg: warning: 'sh' not found in PATH or not executable. dpkg: warning: 'rm' not found in PATH or not executable. dpkg: warning: 'tar' not found in PATH or not executable. dpkg: error: 3 expected programs not found in PATH or not executable. Note: root's PATH should usually contain /usr/local/sbin, /usr/sbin and /sbin. I didn't edit /etc/environment (or any other files), this is what it looks like: PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" RUNNING_UNDER_GDM="yes" I have no idea how to fix this. I'm running dualboot Ubuntu 12.04 and Windows 7, Windows boots fine.

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  • mp3 codecs cannot be installed no software is actually installing

    - by joseph michore
    My Rythm box player cannot play mp3 and iget this error "GStreamer extra plugins cannot be installed on your computer type (i386) Either the application requires special hardware features or the vendor decided to not support your computer type" if i go to software center i get this error The repository may no longer be available or could not be contacted because of network problems. If available an older version of the failed index will be used. Otherwise the repository will be ignored. Check your network connection and ensure the repository address in the preferences is correct. in shot i have tried to dowload deb softs i still get the error above .so i have downloaded tar.gz and i have installed using terminal but i get another error of gcc c++ insanity check failure! i ask my self what i am supposed to do nothing is working nothing at all yet i have to run my bussiness help urgently before i collapse and choose to die!

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  • How does this game loop actually work?

    - by Nicolai
    I read this playfulJS post, about ray-casting: http://www.playfuljs.com/a-first-person-engine-in-265-lines/ It looks really interested, so I decided to look at his javascript. I am no expert in javascript, so I quickly got lost. It's the game loop "object" that really gets me. I simply don't understand how it works. From the code: function GameLoop() { this.frame = this.frame.bind(this); this.lastTime = 0; this.callback = function() {}; } GameLoop.prototype.start = function(callback) { this.callback = callback; requestAnimationFrame(this.frame); }; GameLoop.prototype.frame = function(time) { var seconds = (time - this.lastTime) / 1000; this.lastTime = time; if (seconds < 0.2) this.callback(seconds); requestAnimationFrame(this.frame); }; var loop = new GameLoop(); loop.start(function frame(seconds) { map.update(seconds); player.update(controls.states, map, seconds); camera.render(player, map); }); Now, what really confuses me here, is this bind stuff and how this actually loops. I am guessing, that if less than 0.2 seconds have passed, since the last time the loop was run, it simply goes back to re-check the time. If more than 0.2 seconds have passed, it leaves the frame function, and executes the 3 lines in the loop. But, if this is true, then how does the loop.start() get called again? And what on earth is the meaning of this.frame = this.frame.bind(this);? I've looked up prototypes bind() but I really don't understand it.

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  • Actually utilizing relational databases for entity systems

    - by Marc Müller
    Recently I was researching several entity systems and obviously I came across T=Machine's fantastic articles on the subject. In Part 5 of the series the author uses a relational schema to explain how an entity system is built and works. Since reading this, I have been wondering whether or not actually using a compact SQL library would be fast enough for real-time usage in video games. Performance seems to be the main issue with a full blown SQL database for management of all entities and components. However, as mentioned in T=Machine's post, basically all access to data inside the SQLDB is done sequentlially by each system over each component. Additionally, using a library like SQLite, one could easily improve performance by storing the entity data exclusively in RAM to increase access speeds. Disregarding possible performance issues, using a SQL database, in my opinion, would allow for a very intuitive implementation of entity systems and bring a long certain other benefits like easy de/serialization of game states and consistency checks like the uniqueness of entity IDs. Edit for clarification: The main question was whether using a SQL database for the actual entity management (not just storing the game state on the disk) in a real-time game would still yield a framerate appropriate for a game or even if someone is aware of projects that demonstrate SQL in a video game.

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  • Maximize, minimize and close buttons are either not present or not working in Lubuntu

    - by jimirings
    As the title indicates, the maximize, minimize, and close buttons are either not present or not working on my Lubuntu desktop. In fact, it only seems to be Google Chrome that displays the buttons at all, and only the close button works in Chrome, maximize and minimize don't do anything. When I use regular Ubuntu, they're all there just fine but not on Lubuntu. This all seemed to occur after I hooked my netbook up to an external monitor while using Lubuntu. Not sure if that had anything to do with it or not, but it seemed too big of a coincidence to not mention. Any ideas what the cause and a fix might be? Thanks in advance.

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