BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  TAdoData Master Detail Relationships          BorlandTalk.com Forum Index -> Delphi Databases (ADO) View previous topic :: View next topic   Author Message Jeff Howard Guest Posted: Fri Feb 18, 2005 10:49 pm    Post subject: TAdoData Master Detail Relationships I have been doing some stress testing with my new application that is using Access as a database with my AdoDataSet2 having a master relationship with the primary field of my AdoDataSet1. I have noticed that once I get up around 50,000 records in my master table and 140,000 in my detail table (my detail table has a primary key built upon the first 2 fields so about 3 records per master record) that to do a seek or next or prior is really slow, sometimes up to 2-4 seconds to move the master cursor. If my detail table is empty then it has no problem. I am using a server side cursor so that I can use seek and build indexes. Any thoughts as if I am doing something wrong is or is there too much overhead associated with the master/detail relationship? Back to top yc Guest Posted: Sat Feb 19, 2005 4:13 pm    Post subject: Re: TAdoData Master Detail Relationships Any thoughts that I can remember is make sure that in your detail table the column you are using to seek is indexed. Hope it helps yc "Jeff Howard" <jhoward (AT) cubiscan (DOT) com> wrote Quote: I have been doing some stress testing with my new application that is using Access as a database with my AdoDataSet2 having a master relationship with the primary field of my AdoDataSet1. I have noticed that once I get up around 50,000 records in my master table and 140,000 in my detail table (my detail table has a primary key built upon the first 2 fields so about 3 records per master record) that to do a seek or next or prior is really slow, sometimes up to 2-4 seconds to move the master cursor. If my detail table is empty then it has no problem. I am using a server side cursor so that I can use seek and build indexes. Any thoughts as if I am doing something wrong is or is there too much overhead associated with the master/detail relationship? Back to top Jeff Howard Guest Posted: Wed Feb 23, 2005 6:00 pm    Post subject: Re: TAdoData Master Detail Relationships My detail table seems to be the table that is slowing things down. The detail table has a primary key based upon the first two fields as well as a indexed field on the first field of the detail table which is the field that links back to the master table. When I try to navigate through the records in the master table it is extremely slow when the master/detail link is established (the master table has about 50k, and the detail table has about 125,000 records) for example to click the next button takes at least 1 second to respond. When I remove the master detail link then it is instaneous. Any thoughts as to why the performace is so bad with the master detail link established and over 100,000 records? Behind the scenes is this truly a sql join and therefore a performance pig? "yc" <email (AT) test (DOT) com> wrote Quote: Any thoughts that I can remember is make sure that in your detail table the column you are using to seek is indexed. Hope it helps yc "Jeff Howard" <jhoward (AT) cubiscan (DOT) com> wrote in message news:42167281$1 (AT) newsgroups (DOT) borland.com... I have been doing some stress testing with my new application that is using Access as a database with my AdoDataSet2 having a master relationship with the primary field of my AdoDataSet1. I have noticed that once I get up around 50,000 records in my master table and 140,000 in my detail table (my detail table has a primary key built upon the first 2 fields so about 3 records per master record) that to do a seek or next or prior is really slow, sometimes up to 2-4 seconds to move the master cursor. If my detail table is empty then it has no problem. I am using a server side cursor so that I can use seek and build indexes. Any thoughts as if I am doing something wrong is or is there too much overhead associated with the master/detail relationship? Back to top Vitali Kalinin Guest Posted: Thu Feb 24, 2005 10:00 am    Post subject: Re: TAdoData Master Detail Relationships Change yours detail table to parameterized query. Back to top Jeff Howard Guest Posted: Thu Feb 24, 2005 3:37 pm    Post subject: Re: TAdoData Master Detail Relationships Thanks! What about data shaping which means that I would remove the detail table and create an additional field in the master table to hold the detail records? I have not ever used data shaping so I have no idea if it works with Access or if it is very effecient. "Brian Bushay TeamB" <BBushay (AT) Nmpls (DOT) com> wrote Quote: My detail table seems to be the table that is slowing things down. The detail table has a primary key based upon the first two fields as well as a indexed field on the first field of the detail table which is the field that links back to the master table. When I try to navigate through the records in the master table it is extremely slow when the master/detail link is established (the master table has about 50k, and the detail table has about 125,000 records) for example to click the next button takes at least 1 second to respond. When I remove the master detail link then it is instaneous. Any thoughts as to why the performace is so bad with the master detail link established and over 100,000 records? I think you are hitting the limits of what you can do with Access serverside cursors. I suggest you switch to using a clientside cursor at least for the detail data. -- Brian Bushay (TeamB) [email]Bbushay (AT) NMPLS (DOT) com[/email] Back to top Jeff Howard Guest Posted: Thu Feb 24, 2005 3:39 pm    Post subject: Re: TAdoData Master Detail Relationships So would I just remove the master detail relationship and then use a query with a where clause to get my detail records? "Vitali Kalinin" <vitkalinin (AT) yahoo (DOT) com> wrote Quote: Change yours detail table to parameterized query. Back to top Vitali Kalinin Guest Posted: Thu Feb 24, 2005 4:20 pm    Post subject: Re: TAdoData Master Detail Relationships Nope you should change CommandText of detail dataset to something like this: select * from <DETAIL> where <MASTER_ID> = :MASTER_ID and thats all. If you need exact syntax then show DDL for master and detail tables. Back to top Nick Kilpasis Guest Posted: Wed Apr 13, 2005 1:50 pm    Post subject: Re: TAdoData Master Detail Relationships Can you give a sample with more than one master fields I can;t make it work with Insert in detail table "Vitali Kalinin" <vitkalinin (AT) yahoo (DOT) com> wrote Quote: Nope you should change CommandText of detail dataset to something like this: select * from <DETAIL> where <MASTER_ID> = :MASTER_ID and thats all. If you need exact syntax then show DDL for master and detail tables. 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 (ADO) 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.