BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Cancel a Query, how to          BorlandTalk.com Forum Index -> Delphi Databases (SQL Servers) View previous topic :: View next topic   Author Message Michael Luna Guest Posted: Fri May 14, 2004 12:00 am    Post subject: Cancel a Query, how to My MS Sql database is over a terribyte. Sometimes a user want to cancel a query (some can take a few minutes) when a user makes a mistatke in their request, they must wait unitll the incorrect querry runs it's course. (select queries only, no updates or inserts or deletes) How can I have the user cancel the query I belive I have to use a thread. I plan to have a form with a cancel button pop up and disable the calling form untill the query is complete or cancel. I have to get data from the results to the calling form. D7, SQL 2000 Thanks in Advance Back to top Del Murray Guest Posted: Fri May 14, 2004 1:23 am    Post subject: Re: Cancel a Query, how to AFAIK there is no way to cancel a query, once you turn it loose to the database engine, it is out of your control. The best thing is to tune the queries and the database so that queries run very very fast. You would be surprised at the mistakes folks make configuring a SQL server database . Indexes that dont get used, clustering index when it should not be done, no covering index or using a covering index when it's wrong, parameters that drive sql server nuts, I saw one last week where the programmers had been messing with the server for 18 months trying to get a 4 CPU 4GIG machine to run queries faster. They had set Max Memory to 1.2 Gig and didn't realize what they had done. the other 3 gig were not being used. There are a ton of things you might be able to do so that the 2 or 4 minutes query really runs in 6 or 18 seconds which means it doesn't have to get canceled. Back to top Craig van Nieuwkerk Guest Posted: Fri May 14, 2004 3:07 am    Post subject: Re: Cancel a Query, how to "KILL pid" will kill a process in SQLServer. You can see processes with sp_who. Quote: AFAIK there is no way to cancel a query, once you turn it loose to the database engine, it is out of your control. The best thing is to tune the queries and the database so that queries run very very fast. You would be surprised at the mistakes folks make configuring a SQL server database . Indexes that dont get used, clustering index when it should not be done, no covering index or using a covering index when it's wrong, parameters that drive sql server nuts, I saw one last week where the programmers had been messing with the server for 18 months trying to get a 4 CPU 4GIG machine to run queries faster. They had set Max Memory to 1.2 Gig and didn't realize what they had done. the other 3 gig were not being used. There are a ton of things you might be able to do so that the 2 or 4 minutes query really runs in 6 or 18 seconds which means it doesn't have to get canceled. Back to top Michael Luna Guest Posted: Fri May 14, 2004 8:39 pm    Post subject: Re: Cancel a Query, how to The system is optimized to the best we know how "Del Murray" <Del.Murray (AT) N_S_CreditHawk (DOT) Net> wrote Quote: AFAIK there is no way to cancel a query, once you turn it loose to the database engine, it is out of your control. The best thing is to tune the queries and the database so that queries run very very fast. You would be surprised at the mistakes folks make configuring a SQL server database . Indexes that dont get used, clustering index when it should not be done, no covering index or using a covering index when it's wrong, parameters that drive sql server nuts, I saw one last week where the programmers had been messing with the server for 18 months trying to get a 4 CPU 4GIG machine to run queries faster. They had set Max Memory to 1.2 Gig and didn't realize what they had done. the other 3 gig were not being used. There are a ton of things you might be able to do so that the 2 or 4 minutes query really runs in 6 or 18 seconds which means it doesn't have to get canceled. Back to top Michael Luna Guest Posted: Fri May 14, 2004 8:44 pm    Post subject: Re: Cancel a Query, how to I need help in setting this up with mulit threading so the user can cancel. "Craig van Nieuwkerk" <craigvn (AT) dart (DOT) net.au> wrote Quote: "KILL pid" will kill a process in SQLServer. You can see processes with sp_who. AFAIK there is no way to cancel a query, once you turn it loose to the database engine, it is out of your control. The best thing is to tune the queries and the database so that queries run very very fast. You would be surprised at the mistakes folks make configuring a SQL server database . Indexes that dont get used, clustering index when it should not be done, no covering index or using a covering index when it's wrong, parameters that drive sql server nuts, I saw one last week where the programmers had been messing with the server for 18 months trying to get a 4 CPU 4GIG machine to run queries faster. They had set Max Memory to 1.2 Gig and didn't realize what they had done. the other 3 gig were not being used. There are a ton of things you might be able to do so that the 2 or 4 minutes query really runs in 6 or 18 seconds which means it doesn't have to get canceled. Back to top Michael Luna Guest Posted: Fri May 14, 2004 9:14 pm    Post subject: Re: Cancel a Query, how to Now that I thnik about it. I don't need to cancel the query, Just release the the thread the called the query. So the Delphi App can continue on to other task, manily the user redifining his query. "Del Murray" <Del.Murray (AT) N_S_CreditHawk (DOT) Net> wrote Quote: AFAIK there is no way to cancel a query, once you turn it loose to the database engine, it is out of your control. The best thing is to tune the queries and the database so that queries run very very fast. You would be surprised at the mistakes folks make configuring a SQL server database . Indexes that dont get used, clustering index when it should not be done, no covering index or using a covering index when it's wrong, parameters that drive sql server nuts, I saw one last week where the programmers had been messing with the server for 18 months trying to get a 4 CPU 4GIG machine to run queries faster. They had set Max Memory to 1.2 Gig and didn't realize what they had done. the other 3 gig were not being used. There are a ton of things you might be able to do so that the 2 or 4 minutes query really runs in 6 or 18 seconds which means it doesn't have to get canceled. Back to top Ray Guest Posted: Fri May 28, 2004 11:24 am    Post subject: Re: Cancel a Query, how to You can cancel a query if you set the query to run asynchronously in ADO. However, that itself introduces a whole new set of complications, especially in dealing with the result set when it comes back. -- Peter Yeoh http://www.yohz.com Need smaller backup files? Try MiniSQLBackup "Michael Luna" <michael (AT) winvotes (DOT) com> wrote Quote: Now that I thnik about it. I don't need to cancel the query, Just release the the thread the called the query. So the Delphi App can continue on to other task, manily the user redifining his query. "Del Murray" <Del.Murray (AT) N_S_CreditHawk (DOT) Net> wrote in message news:40a41ec7$1 (AT) newsgroups (DOT) borland.com... AFAIK there is no way to cancel a query, once you turn it loose to the database engine, it is out of your control. The best thing is to tune the queries and the database so that queries run very very fast. You would be surprised at the mistakes folks make configuring a SQL server database . Indexes that dont get used, clustering index when it should not be done, no covering index or using a covering index when it's wrong, parameters that drive sql server nuts, I saw one last week where the programmers had been messing with the server for 18 months trying to get a 4 CPU 4GIG machine to run queries faster. They had set Max Memory to 1.2 Gig and didn't realize what they had done. the other 3 gig were not being used. There are a ton of things you might be able to do so that the 2 or 4 minutes query really runs in 6 or 18 seconds which means it doesn't have to get canceled. Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi Databases (SQL Servers) All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.