I can confirm that the first method (using Clob#getSubString) does NOT 
work for MySQL, since the Hibernate ClobImpl class does not allow 
extraction of data using getSubString, which is exactly the method 
MySQL uses to get to the character data (which actually causes the 2nd 
method to bomb as well, since the stream methods are not used by the 
MySQL JDBC driver (v 3.0.14) in this case).