ResultSet.updateObject(int index, Object x, int scale)
ResultSet.updateObject(String, Object x, int scale)

The scale column is being changed to be called scaleOrLength to provide support for Readers.

This had not compatibility implications, just addtional functionality
The following methods were ommitted from the JDBC 4 initial Integration:

ResultSet
getNString(int)
getNString(String)

CallableStatement
getNString(int)
getNString(String)

SQLInput

readRowId()
readNString()
readSQLXML()
readNClob()

SQLOutput
writeRowId()
writeNString()
writeSQLXML()
writeNClob()

SQLXML

createStreamReader()
createStreamWriter()

DataTruncation
 2 new constructors which support the cause parameter