MDAC 2.5 SDK - OLE DB Programmer's Reference
OLE DB Interfaces
Commits a transaction.
HRESULT Commit(
BOOL fRetaining,
DWORD grfTC,
DWORD grfRM);
Parameters
fRetaining
[in]
Whether the commit is retaining or nonretaining.
Note A retaining commit or abort should not change the characteristics (isolation level, isolation flags, transaction options) of the transaction. The new unit of work retains the same characteristics as the committed work.
grfTC
[in]
Values taken from the enumeration XACTTC. Values that may be specified in grfTC are as follows. These values are mutually exclusive.
| Flag | Description |
| XACTTC_ASYNC_PHASEONE | When this flag is specified, an asynchronous commit is performed. |
| XACTTC_SYNC_PHASEONE | When this flag is specified, the call to ITransaction::Commit returns after phase one of the two-phase commit protocol. |
| XACTTC_SYNC_PHASETWO | When this flag is specified, the call to ITransaction::Commit returns after phase two of the two-phase commit protocol. |
| XACTTC_SYNC | Synonym for XACTTC_SYNC_PHASETWO. |
grfRM
[in]
Must be zero.
Return Code
S_OK
The transaction was successfully committed.
XACT_S_ASYNC
An asynchronous commit was specified. The commit operation has begun, but its outcome is not yet known. When the transaction is complete, notification will be sent by ITransactionOutcomeEvents.
E_FAIL
A provider-specific error occurred. The transaction was aborted.
E_UNEXPECTED
An unexpected error occurred. The transaction status is unknown.
XACT_E_ABORTED
The transaction was aborted before ITransaction::Commit was called.
XACT_E_ALREADYINPROGRESS
A commit or abort operation was already in progress. This call was ignored.
XACT_E_CANTRETAIN
Retaining commit is not supported, or a new unit of work could not be created. The commit succeeded and the session is in auto-commit mode.
Commit was called on a distributed transaction with fRetaining set to TRUE.
XACT_E_COMMITFAILED
The transaction failed to commit for an unknown reason. The transaction was aborted.
XACT_E_CONNECTION_DOWN
The connection to the transaction manager failed. The transaction was aborted.
XACT_E_INDOUBT
The transaction status is in doubt. A communication failure occurred, or a transaction manager or resource manager has failed.
XACT_E_NOTRANSACTION
Unable to commit the transaction because it had already been implicitly or explicitly committed or aborted. This call was ignored.
XACT_E_NOTSUPPORTED
An invalid combination of commit flags was specified, or grfRM was not equal to zero. This call was ignored.
Comments
The following table shows how values of the fRetaining parameter and DBPROP_COMMITPRESERVE affect the rowset state and transaction mode.
| DBPROP_COMMITPRESERVE | fRetaining |
Rowset state after commit |
Resulting transaction mode of session |
| FALSE | FALSE | zombie | implicit/auto-commit |
| FALSE | TRUE | zombie | explicit/manual-commit |
| TRUE | FALSE | preserved | implicit/auto-commit |
| TRUE | TRUE | preserved | explicit/manual-commit |
If ITransaction::Commit fails for any reason that results in an aborted transaction, the session is left in auto-commit mode.
See Also