Mike Yearwood
Toronto, Ontario, Canada
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Base de données, Tables, Vues, Index et syntaxe SQL
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>Hi All,
>
>We are looking to perform transaction protection against a remote VFP database. We are using cursor adapters and so the data source can flip between SQL Server and a VFP DBC. We wrote a program to loop through the connection handles that we wish to protect and then issue the BEGIN TRANSACTION command and then during the save process we fire the END TRANSACTION or COMMIT (depending on data source) it the TABLEUPDATE was succeesful or issue a ROLLBACK if it fails. This works just fine when SQL Server is the backend data, but when the commands are issued against a DBC the BEGIN TRANSACTION fails with a 42000 - Syntax Error or Access Violation. I received that with another command that I used that was unsupported by the ODBC driver, but moving to an ADO call against the VFPOLEDB driver fixed that one. Not so lucky this time. Does anyone have any ideas?
>
>In its simplest form the calls look like this:
>nHandle = SQLSTRINGCONNECT("Driver={Microsoft Visual FoxPro Driver};SourceType=DBC;SourceDB=C:\database.dbc")
>lnRet = SQLEXEC(nHandle,"BEGIN TRANSACTION")
>
>Thanks in advance,
>Ian
You should be using buffering and the begin transaction should be happening in the save.
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