Sets the designated parameter to a Reader object. The reader must contain the number of characters specified by length otherwise a SQLException will be generated when the CallableStatement is executed. This method differs from the setCharacterStream (int, Reader, int) method because it informs the driver that the parameter value should be sent to the server as a NCLOB. When the setCharacterStream method is used, the driver may have to do extra work to determine whether the parameter data should be send to the server as a LONGNVARCHAR or a NCLOB

Parameters:

parameterName		the name of the parameter to be set
reader		An object that contains the data to set the parameter value to.
length		the number of characters in the parameter data.

Exceptions:

SQLException		if parameterName does not correspond to a named parameter; if the length specified is less than zero; if the driver does not support national character sets; if the driver can detect that a data conversion error could occur; if a database access error occurs or this method is called on a closed CallableStatement
SQLFeatureNotSupportedException		if the JDBC driver does not support this method

Since:  1.6