Heikki,
Thanks for your answer. I was yesterday making other tests using dbExpress components and the only way that I found so far to get the dbExpress components working on transactions on MySQL is using the method ExcuteDirect of the TSQLConnection. This is the code : TSQLConnection *Conn; Conn = SQLConnection1->CloneConnection(); Conn->Connected=true; Conn->ExecuteDirect("BEGIN"); Conn->ExecuteDirect("INSERT INTO regn_info VALUES('t3','test1')"); Conn->ExecuteDirect("INSERT INTO regn_info VALUES('t4','test2')"); Conn->ExecuteDirect("COMMIT"); But I don't know why is impossible to do the same using the normal TSQLQuery. I already sent the message to the borland newsgroups. Thanks Javier -----Original Message----- From: Heikki Tuuri [mailto:[EMAIL PROTECTED]] Sent: 02 September 2002 20:06 To: [EMAIL PROTECTED] Subject: Re: Inno DB Question Javier, it may be that the dbExpress interface is still lagging behind MySQL development. If I recall right, people have complained loudly in Borland newsgroups that dbExpress created a new connection for each SQL query it issues to MySQL. That makes the use of transactions impossible with it. If this has not been fixed in the latest version of dbExpress, it would be good if you would write to Borland people about this, or to the Borland newsgroups. Regards, Heikki Innobase Oy ----- Original Message ----- From: "Javier Diaz" <[EMAIL PROTECTED]> Newsgroups: mailing.database.mysql Sent: Monday, September 02, 2002 3:06 PM Subject: Inno DB Question > Hi all, > > I'm using MySQL 4.0.2 alpha-max with Inno DB and Borland Builder 6.0 to > connect to MySQL. I'm trying to use the new dbExpress component for Borland > to connect to MySQL using the libmysql.dll > > I have been making some tests with transactions using the dbExpress > components and the normal ODBC but I can't get the ROLLBACK function to > work. > Here are some examples: > > using dbExpress > > TSQLConnection Q; > Q= new TSQLQuery(Application); > Q->SQLConnection=SQLConnection1; > > /* I test with and without BEGIN > Q->SQL->Clear(); > Q->SQL->Add("BEGIN"); > Q->ExecSQL(); > */ > > Q->SQL->Clear(); > Q->SQL->Add("SET AUTOCOMMIT=0"); > Q->ExecSQL(); > > Q->SQL->Clear(); > Q->SQL->Add("INSERT INTO regn_info VALUES('t1','test1')"); > Q->ExecSQL(); > > > Q->SQL->Clear(); > Q->SQL->Add("INSERT INTO regn_info VALUES('t2','test2')"); > Q->ExecSQL(); > > Q->SQL->Clear(); > Q->SQL->Add("ROLLBACK"); > Q->ExecSQL(); > > //---------------------------------------------------------- > Using ODBC > > > TQuery *Q_ODBC; > Q_ODBC= new TQuery(Application); > Q_ODBC->DatabaseName="salsadb"; > > /* > Q->SQL->Clear(); > Q->SQL->Add("BEGIN"); > Q->ExecSQL(); > */ > > Q_ODBC->SQL->Clear(); > Q_ODBC->SQL->Add("SET AUTOCOMMIT=0"); > Q_ODBC->ExecSQL(); > > Q_ODBC->SQL->Clear(); > Q_ODBC->SQL->Add("INSERT INTO regn_info VALUES('t1','test1')"); > > Q_ODBC->ExecSQL(); > > > Q_ODBC->SQL->Clear(); > Q_ODBC->SQL->Add("INSERT INTO regn_info VALUES('t2','test2')"); > Q_ODBC->ExecSQL(); > > Q_ODBC->SQL->Clear(); > Q_ODBC->SQL->Add("ROLLBACK"); > Q_ODBC->ExecSQL(); > > In both cases the ROLLBACK dosen't work and I get the inserted values in the > table. > > Any idea what can be happening? > > Thanks a lot > > Javier Diaz > > > > ------------------------------ > > This e-mail is intended for the named addressee only. 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