I have a composite PK class that consists of {int, int, String, String}. Both attributes of type String are mapped to CHAR(size) instead of VARCHAR2(size) in an Oracle DB. My Problem: The EntityManager's find(Class entityClass, Object primaryKey) method returns null instead of an EntityBean. It all works if I handcode my EJBQL and insert the two Strings with trailing white spaces to match the size of the CHAR-Colums in the DB. This is somewhat strange because a SQL select statement works fine without supplying trailing white spaces in the where clause. Any suggestions other than changing to VARCHAR2?? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3993764#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...