This method locks the specified REF in the database and returns the object that the specified REF references, as a custom type, using the specified wait option.

Declaration

// C#
public object GetCustomObjectForUpdate(bool bWait);

Parameters

• bWait

  Specifies if the REF is to be locked with the no-wait option. If wait is set to true, this method invocation does not return until the REF is locked.

Return Value

A custom object that represents the object that the specified REF references.

Exceptions

InvalidOperationException - The specified connection is not open, or a valid custom type has not been registered for type of the referenced object.

OracleException - bWait is set to false, and the lock cannot be acquired.

Remarks

This method returns the latest copy of the referenced object, as a custom type, determined by the custom types registered on the OracleRef connection.

To be able to release the lock on the REF appropriately after flushing the REF using the Flush method on the OracleRef or FlushCache method on the OracleConnection, the application must commit or rollback the transaction. Therefore, it is required that, before invoking this method, a transaction is explicitly started by executing the BeginTransaction method on the OracleConnection object.

This method makes a network round-trip to lock the REF in the database. After this call, programmers can modify the associated row object exclusively. Then a call to the Flush method on the OracleRef or FlushCache method on the OracleConnection flushes the changes to the database.

If true is passed, this method blocks until the lock can be acquired. If false is passed, this method immediately returns. If the lock cannot be acquired, an OracleException is thrown.

The connection must be opened explicitly by the application. This method does not open the connection implicitly.