BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  migration from Delphi_1 table, date 0.0 issue          BorlandTalk.com Forum Index -> Delphi Databases (Desktop) View previous topic :: View next topic   Author Message Gianni Filippini Guest Posted: Thu Mar 15, 2007 3:40 pm    Post subject: migration from Delphi_1 table, date 0.0 issue Hello Group, I have to convert/restructure some tables written in delphi_1; at that time date fields not significant were set to 0.0; Database desktop shows the fields (defined as date) as 00/00/0000. if now I open the tables in delphi_6 these fields cause the error: "0.0 is not a valid timestamp" To clear these fields I tryied the code below but I get the error "type mismatch in expression". I could reinstall delphi_1 and convert these fields from 0.0 to "clear" since delphi_1 accept 0.0, But is there a way to work around ? query1.SQL.Clear; query1.SQL.add('update mytable '); query1.SQL.add('set date9 = :wdate9'); query1.SQL.add('where date9 < 1'); query1.parambyname('wdate9').clear; query1.execsql; Many thanks in advance & regards, Gianni Filippini Back to top Gianni Filippini Guest Posted: Thu Mar 15, 2007 7:00 pm    Post subject: Re: migration from Delphi_1 table, date 0.0 issue Bill, thanks for replying; I use Paradox shipped with delphi_6 regards, Gianni Filippini Back to top Bill Todd Guest Posted: Thu Mar 15, 2007 8:40 pm    Post subject: Re: migration from Delphi_1 table, date 0.0 issue Gianni Filippini wrote: Quote: Hello Group, I have to convert/restructure some tables written in delphi_1; at that time date fields not significant were set to 0.0; Database desktop shows the fields (defined as date) as 00/00/0000. if now I open the tables in delphi_6 these fields cause the error: "0.0 is not a valid timestamp" To clear these fields I tryied the code below but I get the error "type mismatch in expression". I could reinstall delphi_1 and convert these fields from 0.0 to "clear" since delphi_1 accept 0.0, But is there a way to work around ? query1.SQL.Clear; query1.SQL.add('update mytable '); query1.SQL.add('set date9 = :wdate9'); query1.SQL.add('where date9 < 1'); query1.parambyname('wdate9').clear; query1.execsql; Many thanks in advance & regards, Gianni Filippini What database are you using? -- Bill Todd (TeamB) Back to top Bill Todd Guest Posted: Fri Mar 16, 2007 12:11 am    Post subject: Re: migration from Delphi_1 table, date 0.0 issue IIRC, Paradox timestamp fields contain the number of milliseconds sine /1/1/0000 so try the following: UPDATE MYTABLE SET THETIMESTAMP = NULL WHERE THETIMESTAMP = '01/01/0000 00:00:00' -- Bill Todd (TeamB) Back to top Brian Bushay TeamB Guest Posted: Fri Mar 16, 2007 5:42 am    Post subject: Re: migration from Delphi_1 table, date 0.0 issue Quote: "0.0 is not a valid timestamp" To clear these fields I tryied the code below but I get the error "type mismatch in expression". I could reinstall delphi_1 and convert these fields from 0.0 to "clear" since delphi_1 accept 0.0, But is there a way to work around ? query1.SQL.Clear; query1.SQL.add('update mytable '); query1.SQL.add('set date9 = :wdate9'); query1.SQL.add('where date9 < 1'); query1.parambyname('wdate9').clear; query1.execsql; Try this SQL Update "mytablef" set date9 = null where Date9 < '1/1/1900' -- Brian Bushay (TeamB) Bbushay (AT) NMPLS (DOT) com Back to top Gianni Filippini Guest Posted: Fri Mar 16, 2007 2:36 pm    Post subject: Re: migration from Delphi_1 table, date 0.0 issue Bill, Brian, thank you for replying, I solved : query1.SQL.clear; query1.SQL.add('update myTable'); query1.SQL.add('set date9 = null'); query1.SQL.add('where CAST(date9 AS DATE) < :myDATE'); query1.PARAMbyname('myDATE').asdatetime := strtodate('01/01/1900'); query1.ExecSQL; regards, Gianni Filippini 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 (Desktop) 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.