BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Obtaining server side defaults          BorlandTalk.com Forum Index -> Delphi Databases (dbExpress) View previous topic :: View next topic   Author Message Craig Stuntz [TeamB] Guest Posted: Fri Nov 14, 2003 5:12 pm    Post subject: Re: Obtaining server side defaults Pete Gajria wrote: Quote: i have a table with a few cols that have default values how would i go about obtaining those defaults so i can assign them to the default expression on a clientdataset It's generally speaking difficult to answer DB-specific questions when you don't mention which DB you're using. Not all DB servers have support for this. -Craig -- Craig Stuntz [TeamB] . Vertex Systems Corp. . Columbus, OH Delphi/InterBase Weblog : http://delphi.weblogs.com Everything You Need to Know About InterBase Character Sets: http://delphi.weblogs.com/stories/storyReader$306 Back to top Pete Gajria Guest Posted: Fri Nov 14, 2003 5:53 pm    Post subject: Obtaining server side defaults hi, i have a table with a few cols that have default values how would i go about obtaining those defaults so i can assign them to the default expression on a clientdataset thanks pete Back to top Craig Stuntz [TeamB] Guest Posted: Fri Nov 14, 2003 6:15 pm    Post subject: Re: Obtaining server side defaults Pete Gajria wrote: Quote: hi craig, im targetting interbase/oracle for now the idea is to get the defaults at runtime using a generic function. In InterBase the defaults are stored in RDB$FIELDS.RDB$DEFAULT_VALUE. This is binary BLR and about as readable as machine code. InterBase also has a column called RDB$FIELDS.RDB$DEFAULT_SOURCE, where it stores the source code used to generate the BLR. But you can change this (for example, to obfuscate your DB metadata) without affecting the actual default. I don't know how Oracle handles this, but there is no generic way to do this. -Craig -- Craig Stuntz [TeamB] . Vertex Systems Corp. . Columbus, OH Delphi/InterBase Weblog : http://delphi.weblogs.com InterBase Performance Monitor -- Analyze and control your IB7 server: http://delphi.weblogs.com/IBPerformanceMonitor Back to top Pete Gajria Guest Posted: Fri Nov 14, 2003 6:22 pm    Post subject: Re: Obtaining server side defaults hi craig, im targetting interbase/oracle for now the idea is to get the defaults at runtime using a generic function. pete Back to top Craig Stuntz [TeamB] Guest Posted: Fri Nov 14, 2003 6:42 pm    Post subject: Re: Obtaining server side defaults Dmitry Arefiev [gs-soft.ru] wrote: Quote: But defaults may contain expressions. Same in InterBase. -Craig -- Craig Stuntz [TeamB] ž Vertex Systems Corp. ž Columbus, OH Delphi/InterBase Weblog : http://delphi.weblogs.com Please read and follow Borland's rules for the user of their news server: http://info.borland.com/newsgroups/guide.html Back to top Dmitry Arefiev [gs-soft.r Guest Posted: Fri Nov 14, 2003 7:25 pm    Post subject: Re: Obtaining server side defaults Hello ! I will say about Oracle. Take a look on [USER]|[ALL]|[DBA]_TAB_COLUMNS view. They have columns: - DEFAULT_LENGTH - length of default value for column - DATA_DEFAULT - actually default value But defaults may contain expressions. And in Oracle case - on Oracle expression language. So, how you will evaluate that ? <g> Regards, Dmitry -- Dmitry Arefiev, gs-soft Company, community.gs-soft.com Personal - www.da-soft.com SAPx - Delphi to SAP R/3 direct access Saphir - SAP R/3 metadata on your fingertips MetaBase - ERWIN model in Delphi applications NCOCI8 - Freeware Delphi to ORACLE direct access Pete Gajria wrote: Quote: hi craig, im targetting interbase/oracle for now the idea is to get the defaults at runtime using a generic function. pete Back to top Pete Gajria Guest Posted: Fri Nov 14, 2003 7:42 pm    Post subject: Re: Obtaining server side defaults thanks for the replies guys confirms what i thought yeah i do know about the oracle dba_* & all* views being an oracle dba i was simply hoping to get the data using setschemainfo but as mentioned by another poster that seems to be slow on certain drivers regards, pete Back to top Dmitry Arefiev [gs-soft.r Guest Posted: Fri Nov 14, 2003 7:56 pm    Post subject: Re: Obtaining server side defaults Hello ! Quote: But defaults may contain expressions. Same in InterBase. Although my freeware lib (i dont have anymore time to support it already year ...), has complete implementation for Oracle expression language. Also many things from ANSI and etc. So, if it is extremely required, then it may by filled with IB functions. IMHO, operators are at most (in Oracle '||' is string concatination) the same. Regards, Dmitry -- Dmitry Arefiev, gs-soft Company, community.gs-soft.com Personal - www.da-soft.com SAPx - Delphi to SAP R/3 direct access Saphir - SAP R/3 metadata on your fingertips MetaBase - ERWIN model in Delphi applications NCOCI8 - Freeware Delphi to ORACLE direct access 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 (dbExpress) 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.