BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Delphi7 ADO MSSQL2000 Deadlock?          BorlandTalk.com Forum Index -> Delphi Databases (SQL Servers) View previous topic :: View next topic   Author Message Jo Beaven Guest Posted: Fri Oct 08, 2004 10:20 am    Post subject: Delphi7 ADO MSSQL2000 Deadlock? I've written a multi-tier application that uses Delphi ADO classes in the middle tier to connect to a MSSQL2000 database. Whilst it was deployed on a customer site the database got into a state whereby issuing a simple select command in Query Analyzer on a small table (10 records, 6 columns) would not return a recordset - even after 90 seconds. However when the middle tier app was terminated the query would run as expected. If I started the middle tier server again the problem would return. Eventually I got around it be restarting the MSSQLServer service and its OK now. Just wondered if anyone had experienced anything similar? Is it a deadlock issue? I didn't think Selects required a lock? Thanks Jo Beaven Back to top Mark L. Tiede Guest Posted: Wed Nov 17, 2004 6:01 pm    Post subject: Re: Delphi7 ADO MSSQL2000 Deadlock? Jo, Did you have a transaction involved and did you either commit or rollback? If the app was in the middle of the transaction, that could potentially tie up the database. "Jo Beaven" <jo (AT) donor2000 (DOT) co.uk> wrote Quote: I've written a multi-tier application that uses Delphi ADO classes in the middle tier to connect to a MSSQL2000 database. Whilst it was deployed on a customer site the database got into a state whereby issuing a simple select command in Query Analyzer on a small table (10 records, 6 columns) would not return a recordset - even after 90 seconds. However when the middle tier app was terminated the query would run as expected. If I started the middle tier server again the problem would return. Eventually I got around it be restarting the MSSQLServer service and its OK now. Just wondered if anyone had experienced anything similar? Is it a deadlock issue? I didn't think Selects required a lock? 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