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SQLSetConnectOption (Access Driver)

  • Artikkeli

Note

This topic provides Access Driver-specific information. For general information about this function, see the appropriate topic under ODBC API Reference.

fOption Comment
SQL_ACCESS_MODE The SQL_ACCESS_MODE fOption can be set to either SQL_MODE_READ_ONLY or SQL_MODE_READ_WRITE. However, the driver does not prevent updates if SQL_ACCESS_MODE is set to SQL_MODE_READ_ONLY.
SQL_AUTOCOMMIT When the Microsoft Access driver is used, the SQL_AUTOCOMMIT option may be set to either SQL_AUTOCOMMIT_ON or SQL_AUTOCOMMIT_OFF, because the Microsoft Access driver supports transactions[1].
SQL_CURRENT_QUALIFIER Supported.
SQL_LOGIN_TIMEOUT Not supported.
SQL_OPT_TRACE Supported.
SQL_OPT_TRACEFILE Supported.
SQL_PACKET_SIZE Not supported.
SQL_QUIET_MODE Not supported.
SQL_TRANSLATE_DLL Not supported.
SQL_TRANSLATION_OPTION Not supported.
SQL_TXN_ISOLATION SQL_TXN_ISOLATION is always SQL_TXN_READ_COMMITTED.

[1] Atomic transactions are not supported by the Microsoft Access driver. When committing a transaction using the Microsoft Access driver, a finite delay exists between the time the transaction is committed and the time the values are written to disk. This delay is determined by a delay inherent in the Microsoft Jet engine. The page timeout will not be less than a minimum value, even if the PageTimeout option is set below that value. As a result, there is no guarantee that committed data is stable, since changes may be made during the delay.