This constructor creates an instance of the OracleRef class using the specified OracleConnection object, user-defined type name, and an object table name.

Declaration

// C#
public OracleRef(OracleConnection con, string udtTypeName, string objTabName);

Parameters

• con

  An OracleConnection instance.

• udtTypeName

  A user-defined type name.

• objTabName

  An object table name.

Exceptions

ArgumentException - The object type name or the object table name is not valid.

ArgumentNullException - The object type name or the table name is null.

InvalidOperationException - The OracleConnection object is not open.

Remarks

When an OracleRef instance is created, this OracleRef instance is associated with the specific table in the database. In other words, it represents a persistent REF.

This constructor creates a reference to the object table. However, it does not cause any entries to be made in database tables until the object is flushed to the database, that is, until the OracleRef.Flush or the OracleConnection.FlushCache method is called on the OracleRef Connection. Therefore, any operation that attempts to operate on the database copy of the object before flushing the object, such as, lock the object or fetch the latest copy of the object from the database, results in an OracleException.

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