UPDATE 
POSTING_RULE 
SET 
POSTING_RULE.OJB_CONCRETE_CLASS = "net.sourceforge.fenixedu.domain.accounting.postingRules.gratuity.DFAGratuityByAmountPerEctsPR" 
WHERE 
POSTING_RULE.OJB_CONCRETE_CLASS = "net.sourceforge.fenixedu.domain.accounting.postingRules.gratuity.DFAGratuityPR";
