BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  How to handle updates of multi tables ?          BorlandTalk.com Forum Index -> Delphi Databases (Multi-Tier) View previous topic :: View next topic   Author Message Lasse Guest Posted: Sun Oct 05, 2003 7:05 pm    Post subject: How to handle updates of multi tables ? Hi, I have join query in a dbexpress TSQLQuery and I am trying to update 2 tables by writing code in the providers BeforeUpdateRecord event. One table update works fine. But with 2 tables it does not work, for example I get an error that the Field XXXX does not exist. How should I set the providerFlags in the TSQLQuery? Does the provider GetTableName event have any function when updating 2 tables, in that case what should I write there ? Do I need to change some properties in the provider when updating 2 tables ? Please help Lasse Back to top Bill Todd Guest Posted: Sun Oct 05, 2003 7:44 pm    Post subject: Re: How to handle updates of multi tables ? If you need to update fields in both tables you must create and execute your own SQL statements to perform the updates. You can handle updates to join where only fields in one of the tables are being changed by setting the ProviderFlags and using the OnGetTableName event but you are on your own if fields in both tables must be updated. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Lasse Guest Posted: Mon Oct 06, 2003 10:45 am    Post subject: Re: How to handle updates of multi tables ? I forgot to set Applied := True in the BeforeUpdateRecord event. "Bill Todd" <no (AT) no (DOT) com> skrev i meddelandet news:prs0ovgin20tfvoc24ocn2brjnki51h0a7 (AT) 4ax (DOT) com... Quote: If you need to update fields in both tables you must create and execute your own SQL statements to perform the updates. You can handle updates to join where only fields in one of the tables are being changed by setting the ProviderFlags and using the OnGetTableName event but you are on your own if fields in both tables must be updated. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Lasse Guest Posted: Mon Oct 06, 2003 10:51 am    Post subject: Re: How to handle updates of multi tables ? Ok if I do update both tables in the BeforeUpdateRecord event, does that mean that I have to construct a query that check if the record have been changed by other user since I retrieved it?(if I want to know that) Lasse "Bill Todd" <no (AT) no (DOT) com> skrev i meddelandet news:prs0ovgin20tfvoc24ocn2brjnki51h0a7 (AT) 4ax (DOT) com... Quote: If you need to update fields in both tables you must create and execute your own SQL statements to perform the updates. You can handle updates to join where only fields in one of the tables are being changed by setting the ProviderFlags and using the OnGetTableName event but you are on your own if fields in both tables must be updated. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Bill Todd Guest Posted: Mon Oct 06, 2003 12:41 pm    Post subject: Re: How to handle updates of multi tables ? On Mon, 6 Oct 2003 12:51:23 +0200, "Lasse" <NOSPAMlars-ake.makiaho (AT) telia (DOT) com> wrote: Quote: Ok if I do update both tables in the BeforeUpdateRecord event, does that mean that I have to construct a query that check if the record have been changed by other user since I retrieved it?(if I want to know that) Lasse Yes. Just use the old values in the WHERE clause. That is how the Provider ensures that the record has not been changed. -- Bill (TeamB) (TeamB cannot respond to questions received via email) 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 (Multi-Tier) 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.