Retrieves the value of a JDBC NCLOB parameter as a java.sql.NClob object in the Java programming language.

Parameters:

parameterName the name of the parameter

Returns: the parameter value as a NClob object in the Java programming language. If the value was SQL NULL, the value null is returned.

Exceptions:

SQLException if parameterName does not correspond to a named parameter; 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

`SQLException`		if parameterName does not correspond to a named parameter; 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